Fiber Optic Network Patents (Class 380/256)
  • Patent number: 10447472
    Abstract: Systems and method for applying security measures to data sets requiring external quantum-level processing. Specifically, segmenting a data set into a plurality of data blocks/segments, such that each data block is communicated to different external entities for subsequent quantum-level computing processing of the data blocks. Once the data blocks have been quantum-level processed by the external entities and returned to the data provider/owner, the data blocks are combined to re-form the data set.
    Type: Grant
    Filed: February 21, 2017
    Date of Patent: October 15, 2019
    Assignee: BANK OF AMERICA CORPORATION
    Inventor: Manu Jacob Kurian
  • Patent number: 10432396
    Abstract: An identity authentication method for a quantum key distribution process includes selecting, by a sender, preparation bases of an identity authentication bit string in accordance with a preset basis vector selection rule; sending, by a sender, quantum states of the identity authentication bit string and quantum states of a randomly generated key bit string by using different wavelengths. The identity authentication bit string is interleaved in the key bit string at a random position and with a random length.
    Type: Grant
    Filed: July 31, 2018
    Date of Patent: October 1, 2019
    Assignee: ALIBABA GROUP HOLDING LIMITED
    Inventors: Yingfang Fu, Shuanlin Liu
  • Patent number: 10396986
    Abstract: A method for generating a shared secret between a first user and a second user of a network is provided. The first user receives from the second user a first training sequence via a communication link between the first user and the second user. The first user ascertains at least one first value for at least one physical property of the communication link, and determines a portion of the shared secret as a function of the first value. A comparison of the first value to at least one threshold takes place for determining the portion of the shared secret. The first user transmits the first training sequence to the second user via the communication link, and adapts the transmission parameters of the first training sequence as a function of the position of the first value relative to the threshold.
    Type: Grant
    Filed: August 12, 2016
    Date of Patent: August 27, 2019
    Assignee: Robert Bosch GmbH
    Inventor: Stephan Ludwig
  • Patent number: 10382141
    Abstract: A communication linker includes: a classical encoder; an optical transmitter; a receiver; a local oscillator in communication with the receiver and that: receives a feedback signal; and produces a displacement frequency, based on the feedback signal; a single photon detector in communication with the receiver and that: receives an optical signal from the receiver; and produces a single photon detector signal, based on the optical signal; a signal processor in communication with the single photon detector and that: receives the single photon detector signal from the single photon detector; produces the feedback signal, based on the single photon detector signal; and produces a decoded signal, based on the single photon detector signal, the decoded signal comprising a frequency of the feedback signal.
    Type: Grant
    Filed: July 12, 2018
    Date of Patent: August 13, 2019
    Assignee: THE UNITED STATES OF AMERICA, AS REPRESENTED BY THE SECRETARY OF COMMERCE
    Inventors: Sergey V. Polyakov, Ivan Burenkov
  • Patent number: 10355857
    Abstract: A hardware system and encryption method that generates encryption keys based on quantum mechanical phenomena that can be delivered directly, over public wired and wireless channels, to communicating devices. The encryption strength is derived from physical phenomena and not mathematical complexity and, therefore, is “future proof” against advances in computational power. The present invention allows pre-existing networked devices to communicate securely within a geographically defined “protection zone.
    Type: Grant
    Filed: May 21, 2014
    Date of Patent: July 16, 2019
    Assignee: QUBITEKK, INC.
    Inventor: Dennis Duncan Earl
  • Patent number: 10356054
    Abstract: A method for establishing a fully private, information theoretically secure interconnection between a source and a destination, over an unmanaged data network with at least a portion of a public infrastructure. Accordingly, n shares of the source data are created at the source according to a predetermined secret sharing scheme and the shares are sent to the data network, while encrypting the sent data using (n,k) secret sharing. A plurality of intermediating nodes are deployed in different locations over the network, to create a plurality of fully and/or partially independent paths in different directions on the path from the source to the destination, and with sufficient data separation. Then, the shares are sent over the plurality of fully and/or partially independent paths while forcing shares' carrying packets to pass through selected intermediate nodes, such that no router at any intermediating nodes intercepts k or more shares.
    Type: Grant
    Filed: May 18, 2015
    Date of Patent: July 16, 2019
    Assignee: SECRET DOUBLE OCTOPUS LTD
    Inventors: Shlomi Dolev, Shimrit Tzur-David
  • Patent number: 10341096
    Abstract: Various technologies for performing discrete-variable (DV) quantum key distribution (QKD) with integrated electro-optical circuits are described herein. An integrated DV-QKD system uses Mach-Zehnder modulators (MZMs) to modulate a polarization of photons at a transmitter and select a photon polarization measurement basis at a receiver. A transmitter of a DV-QKD system further uses phase shifters to correct for non-idealities of the MZM in output provided to a polarization beam splitter. A receiver of a DV-QKD system can use phase shifters between a polarization beam splitter and an MZM to correct for non-idealities of the polarization beam splitter and the MZM on the receiver side.
    Type: Grant
    Filed: October 10, 2016
    Date of Patent: July 2, 2019
    Assignee: National Technology & Engineering Solutions of Sandia, LLC
    Inventors: Anthony L. Lentine, Christopher DeRose, Paul Davids, Hong Cai
  • Patent number: 10313114
    Abstract: An authentication method for a QKD process includes: a sender selects a basis for preparing authentication information according to an algorithm in an algorithms library, and respectively applies different wavelengths to send quantum states of control information and data information according to a preset information format; a receiver filters the received quantum states, employs a basis of measurement corresponding to the algorithm to measure the authentication information quantum state, sends reverse authentication information when the measurement result is in line with the algorithm, and terminates the distribution process otherwise. In addition, the sender terminates the distribution process when its local authentication information is inconsistent with the reverse authentication information.
    Type: Grant
    Filed: July 29, 2016
    Date of Patent: June 4, 2019
    Assignee: Alibaba Group Holding Limited
    Inventor: Yingfang Fu
  • Patent number: 10313113
    Abstract: In a quantum communication system, each transmitter unit has a source of quantum signals. A receiver unit has a quantum receiver with at least one detector configured to detect quantum signals; a first classical communication device; and a passive optical splitter. The transmitter units are optically coupled to the receiver unit through the passive optical splitter. The passive optical splitter is optically coupled to the quantum receiver through a first spatial channel and optically coupled to the first classical communication device through a second spatial channel. The first spatial channel and second spatial channel are separate spatial channels. The passive optical splitter is configured to distribute an inputted optical signal irrespective of its wavelength.
    Type: Grant
    Filed: August 3, 2015
    Date of Patent: June 4, 2019
    Assignee: Kabushiki Kaisha Toshiba
    Inventors: Bernd Matthias Frohlich, Zhiliang Yuan, Andrew James Shields
  • Patent number: 10305687
    Abstract: A method is provided for a verifying system to verify a location of a target apparatus. The method comprises transmitting a plurality of signals from two or more of a plurality of communication devices of the verifying system to the target apparatus, each signal of the plurality of signals comprising information. The method further comprises sending quantum information to the target apparatus via a quantum communication channel, wherein a plurality of bits is encoded in the quantum information and the encoding of the plurality of bits is based on an output of a function of the information associated with the plurality of signals. The method further comprises receiving a response related to the plurality of bits at two or more of the plurality of communication devices. The method further comprises analyzing the response, the plurality of bits encoded in the quantum information, and a time between the transmitting of the plurality of signals and the receiving of the response.
    Type: Grant
    Filed: February 10, 2015
    Date of Patent: May 28, 2019
    Assignee: QUBALT GMBH
    Inventor: Dominique Unruh
  • Patent number: 10305688
    Abstract: A cloud-based encryption machine key injection system includes at least one key injection sub-system including a key generation device and a quantum key distribution device connected with the key generation device, and a cloud-based encryption machine hosting sub-system including an encryption machine carrying a virtual encryption device and a quantum key distribution device connected with the encryption machine. The key injection sub-system and the encryption machine hosting sub-system are connected with each other through their respective quantum key distribution devices. The key generation device may generate a root key component of the virtual encryption device and transmit the root key component to the encryption machine. The encryption machine may receive root key components from one or more key generation devices and synthesize a root key of the virtual encryption device in accordance with the received root key components.
    Type: Grant
    Filed: April 20, 2016
    Date of Patent: May 28, 2019
    Assignee: ALIBABA GROUP HOLDING LIMITED
    Inventors: Yingfang Fu, Shuanlin Liu
  • Patent number: 10291399
    Abstract: Quantum secure communication systems communicate quantum signals for quantum key distribution and classical signals with encrypted data and commands via a single optical fiber. In some systems, the single fiber carries classical data in both directions along with quantum communications. For example, quantum keys can be used to encrypt packets for bidirectional communication between two parties. In other systems, a single fiber is used for one way classical communications and quantum communications. The communication systems are secured using a security parameter based on the quantum and classical communications across the optical fiber.
    Type: Grant
    Filed: September 30, 2014
    Date of Patent: May 14, 2019
    Assignee: Traid National Security, LLC
    Inventors: Jane Elizabeth Nordholt, Richard John Hughes, Charles Glen Peterson, Raymond Thorson Newell
  • Patent number: 10225732
    Abstract: A system and method for securing communications between a plurality of users communicating over an optical network. The system utilizes a fixed or tunable source optical generator to generate entangled photon pairs, distribute the photons and establish a key exchange between users. The distribution of entangled photon pairs is implemented via at least one wavelength selective switch.
    Type: Grant
    Filed: August 17, 2016
    Date of Patent: March 5, 2019
    Assignee: AT&T Intellectual Property II, L.P.
    Inventors: Mikhail Brodsky, Mark David Feuer
  • Patent number: 10223182
    Abstract: According to an embodiment, a communication device is connected with external devices by quantum communication channels and a classical communication channel, and generates an encryption key with photons exchanged over the quantum communication channel. The communication device includes an acquirer, a calculator, a selector, and a communicating unit. The acquirer is configured to acquire a quantum error rate for each quantum communication channel. The calculator is configured to calculate a metric of a first path to each external device based on the quantum error rate. The selector is configured to select a second path in the classical communication channel to a specific one of the external devices based on the metric. The communicating unit is configured to transmit an application key to the specific one of the external devices over the second path.
    Type: Grant
    Filed: October 16, 2015
    Date of Patent: March 5, 2019
    Assignee: Kabushiki Kaisha Toshiba
    Inventor: Ririka Takahashi
  • Patent number: 10171237
    Abstract: The invention relates to quantum cryptography, and includes a communication system for transmitting a cryptographic key between the ends of a channel, including a transmitting node (Alice) comprising a beam splitter, an electro-optical attenuator, an amplitude modulator, a phase modulator, a storage line, a Faraday mirror, a synchronization detector; a receiving node (Bob) that includes avalanche photodiodes, a beam splitter, a circulator, a delay line, a phase modulator, a polarizing beam splitter, a Mach-Zehnder interferometer, and also a quantum channel for connecting these nodes. In this case, for the storage line is placed between the electro-optical phase modulator of the sender and the Faraday mirror. The limiting frequency of the laser pulse repetition at a fixed value of their width is increased, which makes it possible to use an autocompensation circuit at a frequency corresponding to the width of the laser pulse, which is the maximum possible result.
    Type: Grant
    Filed: December 26, 2017
    Date of Patent: January 1, 2019
    Assignee: Inernational Center for Quantum Optics & Quantum Technologies LLC
    Inventors: Alexandr Valerievich Duplinskiy, Vasily Evgenyevich Ustimchik, Yuri Vladimirovich Kurochkin, Vladimir Leonidovich Kurochkin, Alexander Vitalievich Miller
  • Patent number: 10129021
    Abstract: A photon pair generator includes a light source configured to emit light, and a nonlinear optical element configured to receive the light radiated from the light source and generate a quantum-entangled photon pair through spontaneous parametric down-conversion (SPDC), the nonlinear optical element including a polar material layer and a nonlinear material layer provided on the polar material layer.
    Type: Grant
    Filed: April 13, 2015
    Date of Patent: November 13, 2018
    Assignee: SAMSUNG ELECTRONICS CO., LTD.
    Inventors: Heejeong Jeong, Jisoo Kyoung, Changwon Lee, Chanwook Baik, Yeryoung Lee
  • Patent number: 10110322
    Abstract: A secure communication system utilizes multiple “decoy” data signals to hide one or more true data signals. The true data signal(s) are encrypted, and received at a scrambling unit according to an original set of channel assignments. The channel assignments are optically switched with multiple decoy data signals to form a multi-channel “scrambled” output signal that is thereafter transmitted across a communication system. The greater the number of decoy signals, the greater the security provided to the open-air system. Further security may be provided by encrypting the decoy signals prior to scrambling and/or by utilizing a spatially diverse set of transmitters and receivers. Without the knowledge of the channel assignment(s) for the true signal(s), an eavesdropper may be able to intercept (and, with time, perhaps descramble) the open-air transmitted signals, will not be able to distinguish the true data from the decoys without also knowing the channel assignment(s).
    Type: Grant
    Filed: September 1, 2017
    Date of Patent: October 23, 2018
    Assignee: AT&T Intellectual Property II, L.P.
    Inventors: David M. Britz, Robert Raymond Miller, II, Nemmara K. Shankaranarayanan
  • Patent number: 10079677
    Abstract: Techniques are disclosed relating to relating to a public key infrastructure (PKI). In one embodiment, an integrated circuit is disclosed that includes at least one processor and a secure circuit isolated from access by the processor except through a mailbox mechanism. The secure circuit is configured to generate a key pair having a public key and a private key, and to issue, to a certificate authority (CA), a certificate signing request (CSR) for a certificate corresponding to the key pair. In some embodiments, the secure circuit may be configured to receive, via the mailbox mechanism, a first request from an application executing on the processor to issue a certificate to the application. The secure circuit may also be configured to perform, in response to a second request, a cryptographic operation using a public key circuit included in the secure circuit.
    Type: Grant
    Filed: June 4, 2016
    Date of Patent: September 18, 2018
    Inventors: Wade Benson, Libor Sykora, Vratislav Kuzela, Michael Brouwer, Andrew R. Whalley, Jerrold V. Hauck, David Finkelstein, Thomas Mensch
  • Patent number: 10038554
    Abstract: An identity authentication method for a quantum key distribution process includes selecting, by a sender, preparation bases of an identity authentication bit string in accordance with a preset basis vector selection rule; sending, by a sender, quantum states of the identity authentication bit string and quantum states of a randomly generated key bit string by using different wavelengths. The identity authentication bit string is interleaved in the key bit string at a random position and with a random length.
    Type: Grant
    Filed: February 5, 2016
    Date of Patent: July 31, 2018
    Assignee: ALIBABA GROUP HOLDING LIMITED
    Inventors: Yingfang Fu, Shuanlin Liu
  • Patent number: 10020937
    Abstract: An apparatus and method for revealing both attack attempts performed on the single-photon detector(s) of a quantum cryptography system and Trojan horse attack attempts performed on quantum cryptography apparatus containing at least one single photon detector. The attacks detection relies on both the random modification of the setting parameters of the said single-photon detector(s) and the comparison of the measured detection probability values for each setting parameter with the expected detection probability values. The modified parameter of the single-photon detector can be its efficiency or its timing of activation for example.
    Type: Grant
    Filed: March 8, 2017
    Date of Patent: July 10, 2018
    Assignee: ID Quantique SA
    Inventors: Matthieu Legre, Grégorie Ribordy
  • Patent number: 9998255
    Abstract: A fiber optic light intensity encryption method is provided. The method includes determining light intensities associated with multi-frequency light pulses emitted by a laser transmitter apparatus in response to an encryptions process. An encryption type for application of an encryption algorithm to each light intensity is determined and a first light intensity associated with a first light pulse is selected. Data indicating results of the random selection is transmitted to the laser transmitter apparatus and an initial security key is transmitted over a signaling channel of the laser transmitter apparatus. The signaling channel is secured based on the initial security key resulting in a secure signaling channel. In response, a secure bundle comprising said the secure signaling channel and an additional group of channels is generated and the data is transmitted via the secure bundle.
    Type: Grant
    Filed: May 11, 2016
    Date of Patent: June 12, 2018
    Assignee: International Business Machines Corporation
    Inventors: Ricardo A. Golcher Ugalde, Franz F. Liebinger Portela, Meller J. Perez Nunez
  • Patent number: 9921593
    Abstract: The present disclosure provides a detailed description of techniques for implementing a wideband low dropout voltage regulator with power supply rejection boost. More specifically, some embodiments of the present disclosure are directed to a voltage regulator comprising a voltage regulator core powered by a supply voltage and providing a regulated voltage output, and a power supply feed forward injection module delivering an injection signal to the voltage regulator core to effect a power supply rejection of the supply voltage variation from the regulated voltage. In one or more embodiments, the injection signal is determined from the supply voltage variation and a gain factor that is based on various design attributes of the output stage of the voltage regulator core. In one or more embodiments, the power supply feed forward injection module comprises a supply voltage sense circuit, a low pass filter, and one or more selectable transconductance amplifiers.
    Type: Grant
    Filed: December 9, 2016
    Date of Patent: March 20, 2018
    Assignee: INPHI CORPORATION
    Inventors: James Lawrence Gorecki, Han-Yuan Tan
  • Patent number: 9900313
    Abstract: Implementations provide for a secure shell (SSH) proxy for a Platform-as-a-Service (PaaS) system. A method of the disclosure includes receiving, by a processing device executing a Secure Shell (SSH) proxy server, a request to establish an SSH connection with a component of an application of a multi-tenant Platform-as-a-Service (PaaS) system, the component is separate from the SSH proxy server, authenticating credentials provided as part of the request, establishing the SSH connection with a device originating the request, receiving, in view of authenticating the credentials and establishing the SSH connection, routing information for the application, the routing information comprising a location of a node of the multi-tenant PaaS system executing the application, establishing an internal communication session with an executing proxy of the node, and forward information conveyed over the SSH connection to the executing proxy via the internal communication session.
    Type: Grant
    Filed: February 4, 2015
    Date of Patent: February 20, 2018
    Assignee: Red Hat, Inc.
    Inventors: Thomas Wiest, Clayton Coleman, Andrew Goldstein
  • Patent number: 9866379
    Abstract: Quantum communication transmitters include beacon lasers that transmit a beacon optical signal in a predetermined state of polarization such as one of the states of polarization of a quantum communication basis. Changes in the beacon polarization are detected at a receiver, and a retarder is adjusted so that the states of polarization in a received quantum communication optical signal are matched to basis polarizations. The beacon and QC signals can be at different wavelengths so that the beacon does not interfere with detection and decoding of the QC optical signal.
    Type: Grant
    Filed: August 31, 2012
    Date of Patent: January 9, 2018
    Assignee: Los Alamos National Security, LLC
    Inventors: Jane Elizabeth Nordholt, Raymond Thorson Newell, Charles Glen Peterson, Richard John Hughes
  • Patent number: 9838141
    Abstract: A method and system for adaptive quantum information processing can be provided by determining a state of a quantum channel governing an environment with a tomography module. Next a scope of the quantum channel can be calculated with a scope algorithm module. Finally, an optimization module can be utilized to optimize the way to quantum mechanically represent information to be transmitted through the quantum channel based on the scope.
    Type: Grant
    Filed: September 16, 2013
    Date of Patent: December 5, 2017
    Assignee: The United States of America, as represented by the Secretary of the Navy
    Inventor: Keye Martin
  • Patent number: 9800352
    Abstract: A quantum communication system, comprising: a quantum transmitter optically coupled to a first waveguide; a first communication device optically coupled to a second waveguide; a multi-core optical fiber comprising a first core and a second core; a spatial multiplexing unit, configured to optically couple the first waveguide to the first core and the second waveguide to the second core.
    Type: Grant
    Filed: July 14, 2015
    Date of Patent: October 24, 2017
    Assignee: Kabushiki Kaisha Toshiba
    Inventors: Bernd Matthias Frohlich, James Dynes, Zhiliang Yuan, Andrew James Shields
  • Patent number: 9787411
    Abstract: A secure communication system utilizes multiple “decoy” data signals to hide one or more true data signals. The true data signal(s) are encrypted, and received at a scrambling unit according to an original set of channel assignments. The channel assignments are optically switched with multiple decoy data signals to form a multi-channel “scrambled” output signal that is thereafter transmitted across a communication system. The greater the number of decoy signals, the greater the security provided to the open-air system. Further security may be provided by encrypting the decoy signals prior to scrambling and/or by utilizing a spatially diverse set of transmitters and receivers. Without the knowledge of the channel assignment(s) for the true signal(s), an eavesdropper may be able to intercept (and, with time, perhaps descramble) the open-air transmitted signals, will not be able to distinguish the true data from the decoys without also knowing the channel assignment(s).
    Type: Grant
    Filed: January 31, 2017
    Date of Patent: October 10, 2017
    Assignee: AT&T Intellectual Property II, L.P.
    Inventors: David M. Britz, Robert Raymond Miller, II, Nemmara K. Shankaranarayanan
  • Patent number: 9787409
    Abstract: A multi-channel free-space optical wavelength division multiplexing system for optical quantum communication includes a transmitter configured to encode an input signal into a weak optical signal carrying quantum information, and to transmit the weak optical signal over a plurality of frequency channels in free space, each of the plurality of frequency channels corresponding to a plurality of photons of the weak optical signal, and a receiver configured to receive and decode the weak optical signal.
    Type: Grant
    Filed: April 29, 2016
    Date of Patent: October 10, 2017
    Assignee: HRL Laboratories, LLC
    Inventor: Thaddeus D. Ladd
  • Patent number: 9734710
    Abstract: Provided are a real-time traffic flow control and dynamic route guidance system, a parking guidance system using the same, and a method thereof capable of guiding a vehicle distribution and a transportation flow by collecting positional information, destination information, a vehicle moving speed, and the like from each vehicle in real time at one or a plurality of central centers by using an in-vehicle navigator with bidirectional communication and a GPS to dynamically calculate and provide an optimal route of an individual vehicle so as to make a flow of the entire transportation network smooth and perform a control for a transportation network structure through various kinds of traffic control devices installed on roads.
    Type: Grant
    Filed: February 2, 2015
    Date of Patent: August 15, 2017
    Assignee: KOREA UNIVERSITY RESEARCH AND BUSINESS FOUNDATION
    Inventor: Chung Gu Kang
  • Patent number: 9705777
    Abstract: Various aspects provide for non-intrusively monitoring a network system. A multiplexing component is configured to receive a plurality of first encoded signals and generate a plurality of second encoded signals. The plurality of second encoded signals contain a different data rate and a different number of network lanes than the plurality of first encoded signals. A monitoring component is configured to identify a block location for repeating blocks and an alignment marker in each of the plurality of first encoded signals and/or the plurality of second encoded signals. The monitoring component can also be configured to identify one or more defects, identify error information and/or determine one or more skew values associated with the plurality of first encoded signals and/or the plurality of second encoded signals.
    Type: Grant
    Filed: February 8, 2013
    Date of Patent: July 11, 2017
    Assignee: MACOM CONNECTIVITY SOLUTIONS, LLC
    Inventors: Dimitrios Giannakopoulos, Ben Brown
  • Patent number: 9680641
    Abstract: Techniques and tools for quantum key distribution (“QKD”) between a quantum communication (“QC”) card, base station and trusted authority are described herein. In example implementations, a QC card contains a miniaturized QC transmitter and couples with a base station. The base station provides a network connection with the trusted authority and can also provide electric power to the QC card. When coupled to the base station, after authentication by the trusted authority, the QC card acquires keys through QKD with a trust authority. The keys can be used to set up secure communication, for authentication, for access control, or for other purposes. The QC card can be implemented as part of a smart phone or other mobile computing device, or the QC card can be used as a fillgun for distribution of the keys.
    Type: Grant
    Filed: April 6, 2015
    Date of Patent: June 13, 2017
    Assignee: Los Alamos National Security, LLC
    Inventors: Jane E. Nordholt, Richard John Hughes, Raymond Thorson Newell, Charles Glen Peterson, Danna Rosenberg, Kevin Peter McCabe, Kush T. Tyagi, Nicholas Dallmann
  • Patent number: 9596049
    Abstract: A secure communication system utilizes multiple “decoy” data signals to hide one or more true data signals. The true data signal(s) are encrypted, and received at a scrambling unit according to an original set of channel assignments. The channel assignments are optically switched with multiple decoy data signals to form a multi-channel “scrambled” output signal that is thereafter transmitted across a communication system. The greater the number of decoy signals, the greater the security provided to the open-air system. Further security may be provided by encrypting the decoy signals prior to scrambling and/or by utilizing a spatially diverse set of transmitters and receivers. Without the knowledge of the channel assignment(s) for the true signal(s), an eavesdropper may be able to intercept (and, with time, perhaps descramble) the open-air transmitted signals, will not be able to distinguish the true data from the decoys without also knowing the channel assignment(s).
    Type: Grant
    Filed: May 19, 2014
    Date of Patent: March 14, 2017
    Assignee: AT&T INTELLECTUAL PROPERTY II, L.P.
    Inventors: David M. Britz, Robert Raymond Miller, II, Nemmara K. Shankaranarayanan
  • Patent number: 9596598
    Abstract: Methods and systems are provided for reducing detectability of encryption keys, which may be used to encrypt messages transmitted in a network (e.g., between a base station and a mobile station, such as over the air). Random bit errors may be introduced into the messages to artificially lowering transmission quality, thus makes it harder to detect the encryption key from well-known messages. The random bit errors may be introduced by inverting one or more randomly selected bits in the encrypted message prior to transmitting.
    Type: Grant
    Filed: June 24, 2014
    Date of Patent: March 14, 2017
    Assignee: SWISSCOM AG
    Inventors: Thomas Seiler, Andreas Jarosch
  • Patent number: 9584319
    Abstract: [Problem] It is to provide an optical receiving device, a control method and device of a photon detector, and a dark count evaluation method of the photon detector that make it possible to perform a dark count evaluation with the photon detector performing a receiving operation. [Solution] It is to include a Z pulse information detection unit 205 and a control unit 204 selectively extracting outputs of photon detectors PD1 and PD2 to a transmission light pulse with light intensity substantially equal to zero included in a transmission light pulse train and a dark count evaluation unit 206 evaluating dark counts of the photon detectors based on photon detection counts indicated by the extracted outputs.
    Type: Grant
    Filed: October 29, 2013
    Date of Patent: February 28, 2017
    Assignee: NEC CORPORATION
    Inventor: Ken-ichiro Yoshino
  • Patent number: 9577825
    Abstract: A system and method for distributing a quantum key from a first party to a second party. A first node is connected to a public channel, wherein the first node includes a pulse position modulation encoder connected to a quantum channel. A second node is connected to the public channel, wherein the second node includes a pulse position modulation decoder connected to the quantum channel. The pulse position modulation encoder encodes quantum states |0> and |1>, and transmits the encoded quantum states from the first node to the second node via the quantum channel. Quantum state |1> is encoded as |1>?(|t1>+|t2>)/?{square root over (2)}.
    Type: Grant
    Filed: July 22, 2014
    Date of Patent: February 21, 2017
    Assignee: Raytheon Company
    Inventors: Steven R. Wilkinson, Ulvi Yurtsever
  • Patent number: 9569731
    Abstract: According to an embodiment, a quantum communication device includes a receiver, a sift processor, an estimator, first and second storages, a determination unit, an error corrector, a measurement unit, and a privacy amplifier. The sift processor acquires sift processing data by referring to a cryptographic key bit string in a predetermined bit string with a reference basis randomly selected from a plurality of bases. The estimator acquires an estimated error rate by estimating an error rate of the sift processing data from an error rate of part of the sift processing data. When a sift processing data volume stored in the first storage is not smaller than a first threshold, the determination unit determines order of the sift processing data to be corrected based on an estimated error rate, an error rate range that a check matrix can correct, and estimated correction time, and the check matrix used for correction.
    Type: Grant
    Filed: January 6, 2015
    Date of Patent: February 14, 2017
    Assignee: Kabushiki Kaisha Toshiba
    Inventors: Kazuaki Doi, Yoshimichi Tanizawa
  • Patent number: 9544766
    Abstract: An architecture, system and associated method and apparatus for securely communicating authentication data to a communication device. In one embodiment, the method includes modulating a spectral source's radiation using the authentication data, wherein the spectral source's radiation is adapted to operate as a first transmission medium for carrying the authentication data, the first transmission medium being containable within an enclosure that inhibits passage of the spectral source's radiation (i.e., spectrally opaque enclosure). The modulated authentication data is transmitted via the first transmission medium to the communication device disposed in the spectrally opaque enclosure.
    Type: Grant
    Filed: May 31, 2011
    Date of Patent: January 10, 2017
    Assignee: BlackBerry Limited
    Inventors: Steve Hranilovic, Christopher Labrador
  • Patent number: 9544049
    Abstract: Fiber network for interrogating fiber-optic sensors in a first Passive Optical Network (PON) and in a second PON, the fiber network comprising a test signal transceiver for emitting query signals and for receiving response signals, a first PON and a second PON. Each PON comprises a light source for generating telecommunication signals and a fiber-optic sensor. Each PON can transmit the telecommunication signals to a plurality of subscribers, and is optically connected to the test signal transceiver such that the query signals can be fed into the respective PON and propagate in the PON to the fiber-optic sensor, and such that the test signal transceiver can receive response signals from the fiber-optic sensor through the PON. The fiber network further comprises a query signal splitter, optically connected to the test signal transceiver and to the PONs such that it can feed a query signal into the PONs simultaneously, and such that it can feed response signals from the PONs into the test signal transceiver.
    Type: Grant
    Filed: October 2, 2013
    Date of Patent: January 10, 2017
    Assignee: 3M Innovative Properties Company
    Inventors: Johannes Fink, Manfred Bauer, Ulrich Lutterkordt, Michael Bake, Friedrich W. Denter, Manfred Stieglitz, Michael Mansholt
  • Patent number: 9509507
    Abstract: A method and apparatus comprising a source node. The source node is configured to transmit information using particles with quantum entanglement in a network configured to transmit the information over a reserved path during selected time intervals.
    Type: Grant
    Filed: April 16, 2012
    Date of Patent: November 29, 2016
    Assignee: THE BOEING COMPANY
    Inventors: Jeffrey H. Hunt, Wayne Richard Howe
  • Patent number: 9509589
    Abstract: According to an embodiment, a communication device is connected to a first network and a second network. The communication device includes a generating unit and a converting unit. The generating unit is configured to generate a first set of route information that is route information of the first network. The converting unit is configured to convert the first set of route information, and generate a second set of route information that is route information of the second network.
    Type: Grant
    Filed: February 19, 2014
    Date of Patent: November 29, 2016
    Assignee: Kabushiki Kaisha Toshiba
    Inventors: Yoshimichi Tanizawa, Hideaki Sato, Ririka Takahashi
  • Patent number: 9490909
    Abstract: A method for estimating the noise of a two-photon entangled state, including generating pairs of photons; for each pair of photons, defining a first polarization measurement, associated with a first angle, and defining a second polarization measurement, associated with a second angle. The method includes generating a first string of polarization measurements and a first string of angles; generating a second string of polarization measurements and a second string of angles; generating a first uncorrelated substring, formed by the polarization measurements of the first string associated with angles that are different from the corresponding angles of the second string of angles; generating a second uncorrelated substring, formed by the polarization measurements of the second string associated with angles that are different from the corresponding angles of the first string of angles; and determining an estimate of the noise on the basis of the first and the second uncorrelated substrings.
    Type: Grant
    Filed: December 31, 2012
    Date of Patent: November 8, 2016
    Assignee: SELEX ES S.P.A.
    Inventor: Fabio Antonio Bovino
  • Patent number: 9485095
    Abstract: Client control may be provided. First, content may be encrypted using an actual key. Then an identifier corresponding to a client device may be received and a transformation may be performed on the actual key and the identifier to produce a transmitted key. The transmitted key and the encrypted content may then be sent to the client device where it may be received. The client device may then receive the identifier corresponding to the client device and perform a reverse transformation on the transmitted key using the identifier to produce the actual key. The content may then be decrypted with the actual key.
    Type: Grant
    Filed: February 22, 2013
    Date of Patent: November 1, 2016
    Assignee: Cisco Technology, Inc.
    Inventor: Howard G. Pinder
  • Patent number: 9473301
    Abstract: Techniques for temporal quantum key distribution between at least a first entity and a second entity include measuring an arrival time of each of a plurality of photons within each of a set of time frames. The arrival time can correspond to one of the plurality of time bins within the time frame. Measuring can occur in a randomly selected one of at least two mutually unbiased bases. The mutually unbiased bases can include a basis corresponding to a measurement with dispersion and a basis corresponding to a measurement without dispersion. The randomly selected basis for each time frame can be communicated, via a classical communications channel. A quantum key can be generated from the time bins corresponding to the arrival time of photons within at least some of the time frames for which the randomly selected basis is consistent between the first and the second entity.
    Type: Grant
    Filed: July 22, 2014
    Date of Patent: October 18, 2016
    Assignee: The Trustees Of Columbia University In The City of New York
    Inventors: Dirk R. Englund, Pierre Desjardins, Jacob Mower
  • Patent number: 9467284
    Abstract: According to an embodiment, a transmitter transmits first transmission key data and second transmission key data as quantum information. The transmitter includes a first privacy amplifier and a second privacy amplifier. The first privacy amplifier generates first secure key data by performing privacy amplification to remove information that has possibly been acquired by an eavesdropper of the first transmission key data on the first transmission key data. The second privacy amplifier generates second secure key data by performing the privacy amplification to remove information that has possibly been acquired by the eavesdropper of the second reception key data on the decoded key data.
    Type: Grant
    Filed: July 17, 2014
    Date of Patent: October 11, 2016
    Assignee: KABUSHIKI KAISHA TOSHIBA
    Inventors: Alex Dixon, Yoshimichi Tanizawa
  • Patent number: 9455827
    Abstract: According to an embodiment, a communication apparatus includes a cryptographic key storage, a transmitter, a receiver, and a sharing controller. The cryptographic key storage stores therein one or more cryptographic keys shared with an external device. The transmitter transmits specifying information that specifies at least one of the cryptographic keys to the external device. The receiver receives determination information that indicates a result of determination, which is made by the external device based on the specifying information, on whether the shared cryptographic key is consistent between the apparatus and the external device. When receiving the determination information indicating that the shared cryptographic key is inconsistent between the apparatus and the external device, the sharing controller deletes the cryptographic key specified by the specifying information from the cryptographic key storage.
    Type: Grant
    Filed: July 31, 2014
    Date of Patent: September 27, 2016
    Assignee: Kabushiki Kaisha Toshiba
    Inventors: Yoshimichi Tanizawa, Hideaki Sato, Ririka Takahashi, Alex Dixon
  • Patent number: 9451453
    Abstract: A system and method for securing communications between a plurality of users communicating over an optical network. The system utilizes a fixed or tunable source optical generator to generate entangled photon pairs, distribute the photons and establish a key exchange between users. The distribution of entangled photon pairs is implemented via at least one wavelength selective switch.
    Type: Grant
    Filed: May 20, 2014
    Date of Patent: September 20, 2016
    Assignee: AT&T Intellectual Property II, L.P.
    Inventors: Mikhail Brodsky, Mark David Feuer
  • Patent number: 9430676
    Abstract: An apparatus for encrypting processor related noise is disclosed. A method and a computer program product also perform the functions of the apparatus. The apparatus includes a frequency selection module that selects frequencies for a first noise output. The frequencies are within a range of frequencies of a second noise output. The second noise output is produced by one or more first voltage regulating modules providing power to a processor. The apparatus includes an amplitude selection module that selects an amplitude for each frequency of the first noise output. The apparatus includes a noise scrambling module that produces the first noise output based on one or both of the frequency selection module and the amplitude selection module. The first noise output combines with the second noise output to produce a third noise output such that coherence between the third noise output and operations of the processor is below a threshold.
    Type: Grant
    Filed: March 17, 2015
    Date of Patent: August 30, 2016
    Assignee: LENOVO ENTERPRISE SOLUTIONS (SINGAPORE) PTE. LTD.
    Inventors: Matthew L. Nickerson, Zachary B. Durham, William M. Megarity, Brian C. Totten
  • Patent number: 9356691
    Abstract: A Sagnac interferometer event sensing device is disclosed. The device includes first and second light sources respectively emitting first and second light beams at first and second, different wavelengths. The device includes an optical fiber path, a first portion along which only the first light beam travels, a second portion along which only the second light beam travels, and a third portion along which both the first and second light beams travel. The device includes a first detector at an end of the first portion of the optical path to receive the first light beam, and a second detector at an end of the second portion of the optical path to receive the second light beam. The device includes a first plurality of depolarizers disposed along the first portion of the optical fiber path, and a second plurality of depolarizers disposed along the second portion of the optical fiber path.
    Type: Grant
    Filed: August 14, 2013
    Date of Patent: May 31, 2016
    Assignee: The Cleveland Electric Laboratories Co.
    Inventors: Scott V. Johnson, Mike McNeilly
  • Patent number: 9294271
    Abstract: There is provided a quantum-key-distribution receiving device used in a quantum key distribution system that utilizes a pair of quantum-entangled photons including a signal photon and an idler photon, the quantum-key-distribution receiving device including a single-photon detector in which a secure-key generation rate is dependent on a first performance index ?/(1+Pa), ? denoting a detection efficiency and Pa denoting an after-pulse probability.
    Type: Grant
    Filed: June 19, 2014
    Date of Patent: March 22, 2016
    Assignee: Oki Electric Industry Co., Ltd.
    Inventor: Shin Arahira
  • Patent number: 9270448
    Abstract: Systems and methods for the secure distribution of encryption keys in a network are provided. A Kirchhoff-Law-Johnson-(like)-Noise (KLJN) secure key exchange protocol can be utilized in a network where keys are exchanged between hosts connected by a wire. Such a KLJN secure key exchange protocol provides information security that is information theoretically secure.
    Type: Grant
    Filed: September 17, 2014
    Date of Patent: February 23, 2016
    Assignee: The Texas A&M University System
    Inventors: Elias Eliceo Gonzalez, Laszlo B. Kish, Robert S. Balog