Fiber Optic Network Patents (Class 380/256)
  • Patent number: 8670672
    Abstract: According to one embodiment, a quantum information system includes a source of time dependent entangled photons and an indicating unit. The indicating unit indicates the entangled state of the entangled photons based on the emission time of one or more of the entangled photons.
    Type: Grant
    Filed: July 13, 2010
    Date of Patent: March 11, 2014
    Assignee: Kabushiki Kaisha Toshiba
    Inventors: Richard Mark Stevenson, Anthony John Bennett, Robert Young, Andrew James Shields
  • Patent number: 8666074
    Abstract: An optical fiber secure communication apparatus and a data encryption method therefor are provided. The apparatus comprises a transmitter and a receiver being connected with each other via an optical fiber. The transmitter comprises a PPC processor unit, a field programmable gate array test board, a light-emitting module, an optical fiber coupler and a connection optical fiber. The receiver comprises a wavelength division multiplexer, a connection optical fiber, a photodetector, a field programmable gate array test board, a PPC processor unit and a signal output interface. At the transmitter end, two or more paths of input data are forwarded by the PPC, encrypted by the FPGA and then transmitted to the light-emitting module of two or more wavelengths for conversion from electrical signals into optical signals. At the receiver end, signals of two or more wavelengths enter the photodetector for conversion into electrical signals, which are decrypted by the FPGA and then forwarded by the PPC for output.
    Type: Grant
    Filed: June 4, 2010
    Date of Patent: March 4, 2014
    Assignee: Institute of Semiconductors Chinese Academy of Sciences
    Inventors: Ninghua Zhu, Wei Chen, Jianguo Liu
  • Publication number: 20140044262
    Abstract: Data to be transmitted across an Optical Transport Network (OTN) is encrypted with a non-malleable encryption algorithm. An authentication code configured to allow authentication of the data with a low latency encryption algorithm is generated. A packet is generated which is configured to be transferred across the OTN and contains the encrypted data and the authentication code. The packet is transmitted across the OTN. Non-malleable encryption, origin authentication, data integrity and anti-replay protection are provided for OTNs over Dense Wavelength Division Multiplexed (DWDM) links. In one example, XTS-AES encryption and GMAC authentication techniques are combined to secure OTN frames.
    Type: Application
    Filed: August 9, 2012
    Publication date: February 13, 2014
    Applicant: Cisco Technology, Inc.
    Inventors: Gilberto Loprieno, David McGrew, Fabio Maino, Scott Fluhrer
  • Patent number: 8650401
    Abstract: A method of performing quantum key distribution across a network. The method involves a first node first agreeing a quantum key with a first intermediate node in the path. Next the intermediate node exchanges a quantum signal with the next node in the path—which is a targeted node. The intermediate node communicates with the first node using the previous established quantum key details of the quantum signal sent or received by the intermediate node. The first node then performs a key agreement step to agree a quantum key directly with the targeted node. Having established a quantum key with the current targeted node the method can be repeated but with the next node in the network path as the targeted node until a destination node is reached. The final quantum key agreed with the destination node can then be used for encrypting communication between those nodes across the network.
    Type: Grant
    Filed: January 23, 2009
    Date of Patent: February 11, 2014
    Assignee: Qinetiq Limited
    Inventors: Simon Robert Wiseman, Brian Sinclair Lowans
  • Patent number: 8649521
    Abstract: A method begins by a processing module receiving data to produce received data segments. The method continues with the processing module, in order of receiving the data segments, encrypting a data segment to produce an encrypted data segment, dispersed storage error encoding the encrypted data segment to produce a set of encoded data slices, buffering at least a number of encoded data slices of the set of encoded data slices to produce first buffered encoded data slices, and buffering remaining encoded data slices of the set of encoded data slices to produce second buffered encoded data slices. The method continues with the processing module outputting the first buffered encoded data slices and, at most, some of the second buffered encoded data slices in accordance with a pseudo random output sequencing order when a number of first buffered encoded data slices compares favorably to an outputting threshold.
    Type: Grant
    Filed: November 28, 2010
    Date of Patent: February 11, 2014
    Assignee: Cleversafe, Inc.
    Inventors: Gary W. Grube, Timothy W. Markison
  • Patent number: 8644513
    Abstract: Various techniques are described for processing externally encrypted data by database management system. Specifically, techniques are described for incorporating encrypted data stored in a first database that was encrypted by a first database management system into a second database where the encrypted data is accessed by a second database management system. When accessing externally encrypted data incorporated into the second database, the second database management system can decrypt portions of the data as needed. Because of the manner of incorporation of externally encrypted data into the second database, specifically because the externally encrypted data need not be decrypted before being incorporated into the second database, the computational overhead and security concerns associated with conventional approaches for migrating encrypted data from one database management system to another are avoided.
    Type: Grant
    Filed: May 16, 2008
    Date of Patent: February 4, 2014
    Assignee: Oracle International Corporation
    Inventor: Daniel ManHung Wong
  • Publication number: 20140016779
    Abstract: A method for resisting tampering, the method including discovering a plurality of electronic packages for communication, each of the plurality of electronic packages having an associated quantum state table, mapping a plurality of communications paths among the plurality of electronic packages, for each communication path of the plurality of communications paths, making an entry into the quantum state table, negotiating key material for each of the plurality of communications paths, for a plurality of data exchanges along each of the plurality of communications paths generating a key, and encrypting a data exchange on a communications path with the key.
    Type: Application
    Filed: July 12, 2012
    Publication date: January 16, 2014
    Applicant: RAYTHEON BBN TECHNOLOGIES CORP.
    Inventor: Christopher B. Lirakis
  • Patent number: 8611534
    Abstract: An electro-optic waveguide polarization modulator (20) comprising a waveguide core (4) having first and second faces defining a waveguide core plane, a plurality of primary electrodes (22, 24) arranged at a first side of the waveguide core plane and out of said plane, and at least one secondary electrode (26) arranged at a second side of the waveguide core plane and out of said plane, wherein the electrodes (22, 24, 26) are adapted in use to provide an electric field having field components (13, 15) in two substantially perpendicular directions within the waveguide core (4) so as modulate the refractive index thereof such that electromagnetic radiation propagating through the core (4) is converted from a first polarization state to a second polarization state.
    Type: Grant
    Filed: September 12, 2007
    Date of Patent: December 17, 2013
    Assignee: QinetiQ Limited
    Inventors: Ewan D Finlayson, Philip M Gorman, John M Heaton, Michael J Kane, Brian S Lowans
  • Patent number: 8611535
    Abstract: A quantum key distribution system comprises a source of entangled photon pairs and two single-photon detectors. The source is coupled to each of the single-photon detectors by optical fiber. Operational systems parameters include the efficiency of the first single-photon detector, the efficiency of the second single-photon detector, and the maximum average number of photon pairs per unit time generated by the source. To characterize the operational systems parameters, the transmittances between the source and each single-photon detector are determined. The dark count probability of the first single-photon detector and the dark count probability of the second single-photon detector are determined. The count probability at the first single-photon detector, the count probability at the second single-photon detector, and the coincidence count probability are determined as a function of the optical power from the source.
    Type: Grant
    Filed: September 15, 2010
    Date of Patent: December 17, 2013
    Assignee: AT&T Intellectual Property I, L.P.
    Inventors: Michael Brodsky, Cristian Antonelli, Jungmi Oh
  • Patent number: 8600057
    Abstract: An example method includes encapsulating, by an optical network device, at least a portion of a data packet to form a passive optical network (PON) frame. The method further includes applying, by the optical network device, a scrambling polynomial to at least a portion of the PON frame to generate a scrambled PON frame. The method further includes determining, by the optical network device, that the scrambled PON frame comprises a consecutive identical digit (CID) sequence greater than a threshold length. The method further includes replacing, by the optical network device the determined CID sequence with a correction pattern to generate a modified scrambled PON frame. The method further includes transmitting, by the optical network device, the modified scrambled PON frame.
    Type: Grant
    Filed: February 2, 2012
    Date of Patent: December 3, 2013
    Assignee: Calix, Inc.
    Inventors: Christopher T. Bernard, Charles J. Eddleston
  • Patent number: 8582770
    Abstract: Communications having high security against information leakage can be established in a current optical fiber network in the following manner. (1) A sender and a receiver share a seed key in advance, and then transmit and receive random numbers superimposed on carrier light accompanied with fluctuations, where transmission basis is determined by a random number. The sender and the receiver check a shared basis determined by the seed key with a random basis and employ only a random number signal superimposed on a slot for the shared basis that coincides with the random basis, and share the random numbers between the sender and the receiver. Here, since the carrier light has fluctuations, a bit error exists in the received signals. However, because of the seed key, a legitimate receiver can receive a signal with a bit error rate smaller than an eavesdropper.
    Type: Grant
    Filed: June 30, 2009
    Date of Patent: November 12, 2013
    Assignee: Hitachi, Ltd.
    Inventor: Tatsuya Tomaru
  • Patent number: 8582769
    Abstract: Systems and methods to communicate securely includes communicating quantum encryption data on a first wavelength-division multiplexing passive optical network (WDM-PON); and communicating data over separate classical channels of a second WDM-PON, wherein the second WDM-PON synchronizes with the first WDM-PON while providing data communication over the classical channels.
    Type: Grant
    Filed: July 30, 2010
    Date of Patent: November 12, 2013
    Assignee: NEC Laboratories America, Inc.
    Inventors: Yi Zhao, Martin Roetteler, Lei Xu, Ting Wang
  • Patent number: 8553884
    Abstract: A quantum communication system including an emitter and a receiver, the emitter including an encoder and at least one photon source and being configured to pass a signal pulse and a reference pulse, which are separated in time, through the encoder and output the signal pulse and the reference pulse. The reference pulse has a higher probability of containing more than one photon than the signal pulse. The receiver includes a decoder and at least one detector for measuring the signal pulse and the reference pulse.
    Type: Grant
    Filed: March 15, 2012
    Date of Patent: October 8, 2013
    Assignee: Kabushiki Kaisha Toshiba
    Inventors: Andrew James Shields, Zhiliang Yuan
  • Patent number: 8509436
    Abstract: A method and apparatus for remotely controlling access to the components of an optically interconnected information processing infrastructure is presented. Access to the infrastructure is controlled independently of the infrastructure operating system.
    Type: Grant
    Filed: April 2, 2010
    Date of Patent: August 13, 2013
    Inventors: Richard H. Selinfreund, Fred Berry
  • Patent number: 8509440
    Abstract: A network component comprising at least one processor configured to implement a method comprising deriving a Master Session Key (MSK) using a secret key and at least one parameter obtained from an Extensible Authentication Protocol (EAP) sequence, deriving a first Pairwise Master Key (PMK) and a second PMK from the MSK, authenticating with a home gateway (HG) using the first PMK, and authenticating with an end point using the second PMK. Included is an apparatus comprising a node comprising an access controller (AC) and a protocol for carrying authentication for network access (PANA) Authentication Agent (PAA), wherein the AC is configured to manage authentication for a UE, and wherein the PAA is configured to implement a PANA to forward authentication information related to the UE.
    Type: Grant
    Filed: August 15, 2008
    Date of Patent: August 13, 2013
    Assignee: Futurwei Technologies, Inc.
    Inventor: John Kaippallimalil
  • Patent number: 8503677
    Abstract: A communication device receives secure communication frames on which a security transform has been performed to permit authentication. The communication device maintains an authentication history and a local time varying parameter. In multi-hop communication, the communication device provisionally verifies the freshness of a received secure communication frame by verifying that identifying information extracted from the frame is not already present in the authentication history and that a received time varying parameter extracted from the frame is not older than the local time varying parameter by more than a certain margin. If these freshness tests both pass, the frame is authenticated. If authentication succeeds, the frame is transmitted on the next hop without performance of a new security transform.
    Type: Grant
    Filed: November 18, 2010
    Date of Patent: August 6, 2013
    Assignee: Oki Electric Industry Co., Ltd.
    Inventors: Taketsugu Yao, Kiyoshi Fukui, Jun Nakashima
  • Patent number: 8503885
    Abstract: A method and system of data transmission; the method comprising: converting data into qubits; transmitting a first qubit; measuring the first qubit at receiver location; determining whether or not to transmit portions of data from a sequential successive qubit based upon the value of the first qubit measured at the receiver location.
    Type: Grant
    Filed: February 12, 2010
    Date of Patent: August 6, 2013
    Assignee: The United States of America as represented by the Secretary of the Army
    Inventors: Ronald Everett Meyers, Keith Scott Deacon
  • Patent number: 8488231
    Abstract: A wavelength-multiplexed polarization entangled photon pair generator (1) includes: a pump light source (2); a polarization entangled photon pair generating body (4) on which pump light (3) outputted from the pump light source (2) falls; and a spectrometer (7) on which a wavelength-multiplexed parametric photon pair (5) outputted from the polarization entangled photon pair generating body 4 falls. The polarization entangled photon pair generating body (4) made of a nonlinear optical crystal (11) generates wavelength-multiplexed photon pairs by subjecting the pump light 3 to type II phase matching. As a nonlinear optical crystal 11, lithium tantalate of periodically poled structure (11A) can be used, and as a spectrometer (7), an arrayed-waveguide grating can be used. Wavelength-multiplexed polarization entangled photon pairs (5) can thus be generated with simple equipment.
    Type: Grant
    Filed: June 3, 2010
    Date of Patent: July 16, 2013
    Assignee: Japan Science and Technology Agency
    Inventors: Ryosuke Shimizu, Keiichi Edamatsu
  • Patent number: 8488967
    Abstract: A system and method for transporting encrypted data having a transmitter and a receiver is provided. The transmitter generates a sequence of optical pulses, which are copied and output as identical channels. The identical channels are modulated by a plurality of modulators using data to generate a modulated data signal. Respective spectral phase encoders coupled to each of the plurality of data modulators encode respective modulated data signals using a plurality of mutually orthogonal phase codes that are individually associated with the respective spectral phase encoder. These encoded data signals are combined and code-scrambling by a spectral phase scrambler using a scramble code as an encryption key to generate an encrypted signal. A receiver reverses the encryption to extract the data.
    Type: Grant
    Filed: June 26, 2009
    Date of Patent: July 16, 2013
    Assignee: Telcordia Technologies, Inc.
    Inventors: Shahab Etemad, Thomas Banwell, Janet Jackel, Ronald Menendez, Paul Toliver
  • Patent number: 8489874
    Abstract: A reach back secure communications terminal includes a digital PBX adapter that offers immediate and secure voice, data and video connectivity over any of various commercially available PBX systems. In addition to use with a PBX system, integrated components simplify access to varied networks allowing deployed users to select and connect quickly to a network that best supports their present mission. Commercial or optional NSA Type 1 encryption may be implemented. Networking options include any of PSTN, PBX, GSM (or CDMA or other cell telephone standard), SAT, IP and WiFi. The digital PBX adapter includes an audio mixer that converts a 4-wire input from a handset jack of a PBX handset base, into a 2-wire output destined for an encryption unit (FNBDT). The user determines a necessary gain of the audio mixer for the particular PBX system by trial and error using a multi-position switch.
    Type: Grant
    Filed: December 10, 2004
    Date of Patent: July 16, 2013
    Assignee: TeleCommunication Systems, Inc.
    Inventors: Fiona S. Best, Dorothy A. McClintock, William Jeremy Lee, Wesley R. Hartwell, Eric Reed
  • Patent number: 8483572
    Abstract: A quantum communication system, said system comprising: an emitter configured to send signal light pulses having a first intensity and decoy light pulses having a second intensity to a receiver, wherein information is encoded on said signal pulses; a controller configured to set the distribution of signal pulses and decoy pulses and the intensity of the signal pulse such that the maximum average secure bit rate is achieved over the range of potential drift in the decoy pulse intensity during use of the system, while maintaining a non-zero secure bit rate over the range of potential drift in the decoy pulse intensity during use of the system.
    Type: Grant
    Filed: October 18, 2010
    Date of Patent: July 9, 2013
    Assignee: Kabushiki Kaisha Toshiba
    Inventors: James Dynes, Zhiliang Yuan, Andrew W. Sharpe, Andrew James Shields
  • Patent number: 8483391
    Abstract: The invention provides time-synchronised transmission of data on the (polarisation or phase-modulated) QKD channel and the (on-off modulated) conventional channel such that a QKD bit is only transmitted when a zero, or sequence of zeros, is transmitted on the conventional channel. Also, there is co-directional propagation of the QKD and conventional channel. Further, there is dispersion management through wavelength selection or control of fibre properties or other means such that the “walk-off in time of the QKD pulses and the Raman pulses generated by the ones on the conventional channel is less than or of the order of one bit period. The latter can be achieved, for example, by placing the conventional and QKD channel wavelengths close to the point where the group velocity-induced time delay for optical pulses propagating in the fibre reaches a minimum. This dispersion minimum occurs at a wavelength of 1.3 microns in standard fibre. The invention discloses a receiver embodiment to implement the invention.
    Type: Grant
    Filed: March 13, 2009
    Date of Patent: July 9, 2013
    Assignee: University College Cork, National University of Ireland, Cork
    Inventor: Paul Townsend
  • Patent number: 8477939
    Abstract: Provided are an apparatus for receiving a quantum cryptographic key and an apparatus for transmitting and receiving a quantum cryptographic key at high speed without polarization drift of an optical pulse signal and phase drift of an interferometer. The apparatus for receiving a quantum key includes: a polarization-insensitive optical phase modulator parts for receiving an optical pulse signal, and modulating and outputting a phase of the optical pulse signal without being affected by the polarization state of the optical pulse signal; an asymmetric Mach-Zehnder interferometer for causing interference in and outputting the optical pulse signal received from the polarization-insensitive optical phase modulator parts; and a photon detectors for detecting the optical pulse signal received from the asymmetric Mach-Zehnder interferometer.
    Type: Grant
    Filed: November 28, 2007
    Date of Patent: July 2, 2013
    Assignee: Electronics and Telecommunications Research Institute
    Inventors: Chun Ju Youn, Tae Gon Noh
  • Patent number: 8477947
    Abstract: Provided is an optical phase modulating method and apparatus for a quantum key distribution. When an optical phase modulator is arranged outside an optical interferometer, a configuration of the optical interferometer may be simplified, and an extension of an optical path caused by the optical phase modulator, instability and an insertion loss increased in the optical interferometer, and the like, may be overcome. An output feature may be improved by adjusting an applied voltage of the optical phase modulator arranged outside the optical interferometer.
    Type: Grant
    Filed: October 6, 2010
    Date of Patent: July 2, 2013
    Assignee: Electronics and Telecommunications Research Institute
    Inventor: Jeong-sik Cho
  • Patent number: 8472626
    Abstract: The invention relates to a system (EM, RE) for the optical transmission of a binary code. The invention makes it possible to carry out a coding of the bits transmitted in terms of intensity and phase by choosing a first base in which the signals coding the bits are distinguished only by a first physical quantity, and a second base in which the signals coding the bits are distinguished only by a second physical quantity.
    Type: Grant
    Filed: September 24, 2007
    Date of Patent: June 25, 2013
    Assignees: Centre National de la Recherche Scientifique—CNRS, Universite de Franche-Comte Besancon
    Inventors: Matthieu Bloch, Jean-Marc Merolla
  • Patent number: 8457316
    Abstract: A system and method for securing communications over a wave division multiplexing optical network between a plurality of users connected to the network. The system utilizes a primary optical source generator that is either tunable, or capable of generating a plurality of wavebands of different frequencies equal to the sum of wavebands serving individual users of the network to facilitate a key exchange between the individual users of the network using summed wavebands, each of which serving an individual user.
    Type: Grant
    Filed: January 15, 2008
    Date of Patent: June 4, 2013
    Assignee: AT&T Intellectual Property II, L.P.
    Inventors: Mikhail Brodsky, Mark David Feuer
  • Patent number: 8442229
    Abstract: An apparatus and method for providing security in a Passive Optical Network (PON) using an Enhanced Security Control management entity (ME). In one embodiment, an optical network unit (ONU) comprising: a processor coupled to a memory and configured to exchange security information between the ONU and an optical line terminal (OLT) by using a plurality of attributes in an Enhanced Security Control management entity (ME) in the ONU via an ONU management control interface (OMCI) channel; wherein the plurality of attributes comprise: an OLT crypto capabilities attribute, an ONU selected crypto capabilities attribute, an OLT random challenge table attribute, an ONU authentication result table attribute, an ONU random challenge table attribute, an OLT authentication result table attribute, and a master session key name attribute.
    Type: Grant
    Filed: November 14, 2011
    Date of Patent: May 14, 2013
    Assignee: Futurewei Technologies, Inc.
    Inventor: Frank J. Effenberger
  • Patent number: 8442228
    Abstract: A multi-class switching system that includes a coder/decoder for converting voice between analog and digital; a first switch coupled to the coder/decoder to isolate non-secure entities in a dial-up network, including fiber optic ports to pass classified and unclassified data to one of a classified IP network and an unclassified IP network, an encryption device coupled to the first switch to encrypt digitized voice, a second switch coupled to the encryption device and directly to the first switch, wherein the second switch receives encrypted digital voice from the encryption device connection and unencrypted digital voice from the direct connection, and wherein the first switch and the second switch operate in a plurality of states including secure, non-secure, and cut-off, a fiber optic (F/O) switch coupled to the coder/decoder, and at least one controller to control states of the first switch, the second switch, and the fiber optic (F/O) switch.
    Type: Grant
    Filed: April 5, 2011
    Date of Patent: May 14, 2013
    Assignee: MicroTechnologies LLC
    Inventor: Joseph F. Staehly
  • Patent number: 8433200
    Abstract: A quantum key delivery system includes an optical circulator, an optical low-pass filter, optical splitters, and first and second optical couplers arranged for outputting various wavelength components including correlated-photon pair wavelength components outputted from an optical loop path. The first and second optical couplers output light beams, which are sent over first and second quantum channels to first and second recipients, respectively. Other optical splitters are adapted to output light rays, from which first and second control signals are produced. From auxiliary idler light components transmitted over the first and second quantum channels, clock signals are extracted. The system thus extracts a clock signal for detecting arrival of photons, and stably operates with an expected value of the number of generated correlated photon pairs maintained at a substantially constant value.
    Type: Grant
    Filed: August 16, 2011
    Date of Patent: April 30, 2013
    Assignee: Oki Electric Industry Co., Ltd.
    Inventor: Shin Arahira
  • Publication number: 20130101119
    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 trusted 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: Application
    Filed: September 30, 2010
    Publication date: April 25, 2013
    Applicant: Los Alamos National Security LLC
    Inventors: Jane Elizabeth Nordholt, Richard John Hughes, Raymond Thorson Newell, Charles Glen Peterson, Danna Rosenberg, Kevin Peter McCabe, Kush T. Tyagi, Nicholas Dallmann
  • Patent number: 8428259
    Abstract: The present invention relates to an apparatus and method for the encryption and decryption of optically transmitted data, and more particularly to the encryption and decryption of optical data transmitted and received using only optical components. Because only optical components are used, the encryption and decryption is independent of the data rate of the optical signal. The apparatus may include an encryption device that operates by receiving and combining both an unencrypted optical signal as well as a delayed optical signal that is based on the unencrypted optical signal. An optical delay may be configured in a number of different ways and may be used for delaying the unencrypted optical signal. The apparatus may further include a decryption device that receives and combines an encrypted optical signal as well as a delayed optical signal that is based on the encrypted optical signal.
    Type: Grant
    Filed: June 9, 2005
    Date of Patent: April 23, 2013
    Assignee: General Dynamics Advanced Information Systems
    Inventor: James P. Waters
  • Publication number: 20130089204
    Abstract: A quantum cryptographic protocol is proposed, which uses two-mode coherent states and an M-ary modulation format determined in part by an expanded secret key. The encrypted signal is optically amplifiable, resulting in a polarization independent system that is compatible with the existing WDM communications infrastructure.
    Type: Application
    Filed: October 11, 2011
    Publication date: April 11, 2013
    Inventors: Prem Kumar, Gregory S. Kanter, Eric Corndorf, Chuang Liang
  • Publication number: 20130083925
    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: Application
    Filed: August 31, 2012
    Publication date: April 4, 2013
    Inventors: Jane Elizabeth Nordholt, Raymond Thorson Newell, Charles Glen Peterson, Richard John Hughes
  • Patent number: 8404506
    Abstract: In a method for the production of a single photon source with a given operational performance, the given operational performance for the individual photon source may be fixed by a directed setting of the fine structure gap of the excitonic energy level for at least one quantum dot. The at least one quantum dot is produced with a quantum dot size corresponding to the fine structure gap for setting.
    Type: Grant
    Filed: November 20, 2006
    Date of Patent: March 26, 2013
    Assignee: Technische Universitaet Berlin
    Inventors: Anatol Lochmann, Robert Seguin, Dieter Bimberg, Sven Rodt, Vladimir Gaysler
  • Patent number: 8397064
    Abstract: A method and system is provided for securing communication on an EPON. Particularly different types of encrypted messages, each with a respective short MAC SegTAG, may be sent from the OLT to an ONU and from an ONU to the OLT without need for a full SecTAG with an explicit SCI. Discovery and control messages may be encrypted and a security offset may be less than 30 bytes. A packet header including its MAC address may be encrypted.
    Type: Grant
    Filed: January 5, 2010
    Date of Patent: March 12, 2013
    Assignee: PMC Sierra Ltd.
    Inventors: Lior Khermosh, Zachy Haramaty, Jeff Mandin
  • Patent number: 8391486
    Abstract: A method is provided for distributing a random list of binary values between first and second parties. The method includes sending photons from the second party into an interferometer at a first beam splitter; performing a first weak measurement on photons as a first pointer result into a first time-ordered list for photons; performing a second weak measurement by the first party on photons that pass through a second beam splitter as being a second pointer result into a second time-ordered list; recording identification for first and second detectors that the photons arrive via a third beam splitter as respective first and second detector registrations for collecting in a third time-ordered list as respective first and second detection lists; determining first and second averages of the respective first and second detection lists; and comparing the averages to verify existence of a non-trivial difference that indicates secure communication status of the element's binary value.
    Type: Grant
    Filed: April 28, 2011
    Date of Patent: March 5, 2013
    Assignee: The United States of America as Represented by the Secretary of the Navy
    Inventor: James E. Troupe
  • Patent number: 8385548
    Abstract: Apparatus and method for producing quantum entangled signal and idler photon pairs is provided. The apparatus makes use of a nonlinear optical fiber to generate the entangled photons. The use of an external broad band light source for alignment of any downstream measurement apparatuses is disclosed. One or more polarized output signals can be generated at both the signal and idler wavelengths using the alignment source, allowing the downstream measurement apparatuses to be aligned using classical light. Multiple signal and idler wavelengths can be generated and aligned using such a system.
    Type: Grant
    Filed: February 18, 2010
    Date of Patent: February 26, 2013
    Assignee: Nucrypt LLC
    Inventors: Gregory S. Kanter, Shawn Wang
  • Patent number: 8374354
    Abstract: A method includes receiving, via a network, a request to provision and provide a private key, the private key being for use with a public and private key system. The method further includes identifying a requester that has made the request via the network and initiating a secure session with the requester. The method also includes providing the private key using the secure session, and provisioning the private key. A system is provided including a distribution location providing access to a network, a terminal selectively connected to the network via the distribution location. The system further includes a network authority selectively connected to the network and the terminal, and a certificate authority selectively connected to the network. The certificate authority is configured to provide and provision a private key, and the network authority is configured to selectively provide a secure session between the terminal and the certificate authority.
    Type: Grant
    Filed: September 27, 2007
    Date of Patent: February 12, 2013
    Assignee: Verizon Data Services LLC
    Inventor: David E. Berggren
  • Patent number: 8374350
    Abstract: A system for transmitting quantum information includes a sending unit including an encoder configured to encode a carrier with quantum information by setting a quantum state of the carrier, the quantum state determined according to the combination of a first component and a second component, and a receiving unit including a decoder configured to perform a measurement on the carrier using a measurement basis selected to cancel the second component and decode the quantum information from the carrier.
    Type: Grant
    Filed: September 8, 2006
    Date of Patent: February 12, 2013
    Assignee: Kabushiki Kaisha Toshiba
    Inventors: Zhiliang Yuan, Andrew James Shields
  • Patent number: 8370630
    Abstract: A mail system having high security is realized by mounting TCP2 for mail communication between client apparatuses. The present invention relates to a mail communication system which is connected to a network and exchanges mails between client apparatuses provided with the existing mailers, and each client apparatus is mounted with a TCP2 driver. A TCP2 driver 34 includes a TCP2 core 36 and a mail system core 37 and an e-mail received via the network is processed in this TCP2 driver 34 and thereafter, is supplied to an existing mailer 31 of the client apparatus. In the mail system core 37 of the TCP2 driver 34, control of mail encryption and decryption, deletion of an unnecessary mail and the like is carried out.
    Type: Grant
    Filed: July 31, 2006
    Date of Patent: February 5, 2013
    Inventor: Keiko Ogawa
  • Patent number: 8355507
    Abstract: An optical switching and delay system for optical encryption and/or optical decryption may comprise a switch bank, a set of optical delay lines, a combiner, and a processor. The switch bank may be configured to receive an optical signal in a first arrangement and route the optical signal to the set of optical delay lines according to a switching arrangement key. The set of optical delay lines may be configured to provide delays to the optical signal. The combiner may be configured to receive the optical signal with delays from the set of optical delay lines and combine the optical signal into a second arrangement. The processor may be configured to receive the switching arrangement key and control the switch bank according to the switching arrangement key. The switching arrangement key may comprise a set of instructions for routing the optical signal.
    Type: Grant
    Filed: February 26, 2009
    Date of Patent: January 15, 2013
    Assignee: Lockheed Martin Corporation
    Inventors: James C. Beffa, Anthony C. Kowalczyk
  • Patent number: 8347075
    Abstract: The present invention provides methods to mitigate the problems associated with MAC address spoofing and denial of service attacks in an FTTH network system. The MAC address spoofing attack may occur when a computer hacker configures his computer to change the MAC address of a data signal to deceive the receiver of the signal's source address. The denial of service may occur when a computer hacker floods a file server with data packets. The present invention mitigates these attacks by modifying the software of certain components of the FTTH network system to enable the components to insert virtual MAC addresses, tags and codes into the data packets that identify a component of the communication related to the address of the source computer.
    Type: Grant
    Filed: November 1, 2002
    Date of Patent: January 1, 2013
    Assignee: Verizon Laboratories Inc.
    Inventor: Muxiang Zhang
  • Publication number: 20120328100
    Abstract: A configuration method of an optical signal, an encryption device, and an encryption system makes it possible for a legitimate communicating party to ensure information-theoretic security against a known plain text attack and to communicate long-distance.
    Type: Application
    Filed: March 2, 2011
    Publication date: December 27, 2012
    Applicant: TAMAGAWA K-12 & UNIVERSITY
    Inventor: Osamu Hirota
  • Patent number: 8340295
    Abstract: A cryptographic system (500) that includes a data stream receiving device (502) configured for receiving a modified data stream representing data entries encrypted using a chaotic sequence of digits. The system also includes user processing device (503, 505) configured for receiving user access information specifying an initial value for the chaotic sequence of digits and data field location information associated with selected ones of the data entries. The system further includes a synchronized pair of chaotic sequence generators (300) coupled to the user processing devices configured for generating encryption and decryption sequences based on the initial value and the data field location information. The system additionally includes an encryption device (504) and a decryption device (506) coupled to the chaotic sequence generators and the data stream receiving device, the decrypter configured for generating an output data stream from the modified data stream by applying the decryption sequences.
    Type: Grant
    Filed: July 1, 2009
    Date of Patent: December 25, 2012
    Assignee: Harris Corporation
    Inventors: Alan J. Michaels, David B. Chester
  • Patent number: 8335316
    Abstract: One embodiment provides a system for decrypting data frames in an Ethernet passive optical network (EPON). During operation, the system maintains a local cipher counter at a local node, and receives from a remote node a data frame which is encrypted based on a remote input block and a session key. The remote input block is constructed based on the remote cipher counter and a remote block counter. The system updates the local cipher counter based on a received field located in a preamble of the data frame, truncates the local cipher counter by discarding a number of least significant bits, and constructs for the received data frame a local input block based on the truncated local cipher counter, the received field, and a local block counter. The system then decrypts the data frame based on the local input block and the session key.
    Type: Grant
    Filed: March 31, 2009
    Date of Patent: December 18, 2012
    Assignee: Broadcom Corporation
    Inventors: Ryan E Hirth, Edward W Boyd, Ngo Thanh Ho
  • Publication number: 20120314863
    Abstract: A method is provided for distributing a random list of binary values between first and second parties. The method includes sending photons from the second party into an interferometer at a first beam splitter; performing a first weak measurement on photons as a first pointer result into a first time-ordered list for photons; performing a second weak measurement by the first party on photons that pass through a second beam splitter as being a second pointer result into a second time-ordered list; recording identification for first and second detectors that the photons arrive via a third beam splitter as respective first and second detector registrations for collecting in a third time-ordered list as respective first and second detection lists; determining first and second averages of the respective first and second detection lists; and comparing the averages to verify existence of a non-trivial difference that indicates secure communication status of the element's binary value.
    Type: Application
    Filed: April 28, 2011
    Publication date: December 13, 2012
    Applicant: United States Government, as represented by the Secretary of the Navy
    Inventor: James E. Troupe
  • Publication number: 20120308006
    Abstract: A method for encrypting multicast services in a passive optical network system is provided in the present invention, and the method includes: an Optical Line Terminal (OLT) generating a public key, and using the public key to encrypt the multicast service data in a bearer channel and then transmitting the encrypted data, the multicast service data in the same one bearer channel being encrypted using the same public key; and said OLT sending the public key, which is used to encrypt the multicast service data, via a management control channel to an Optical Network Unit (ONU) which is activated successfully and requests to receive said multicast service data. A device for encrypting multicast services in a passive optical network system is also provided in the present invention.
    Type: Application
    Filed: November 10, 2010
    Publication date: December 6, 2012
    Applicant: ZTE CORPORATION
    Inventors: Dezhi Zhang, Liquan Yuan
  • Patent number: 8321908
    Abstract: This document discusses, among other things, applying network policy at a network device. In an example embodiment fiber channel hard zoning information may be received that indicates whether a fiber channel frame is permitted to be communicated between two fiber channel ports. Some example embodiments include identifying a media access control address associated with the fiber channel ports. An example embodiment may include generating one or more access control entries based on the fiber channel identifications of the fiber channel ports and the zoning information. The access control entries may be distributed to an Ethernet port to be inserted into an existing access control list and used to enforce a zoning policy upon fiber channel over Ethernet frames.
    Type: Grant
    Filed: June 16, 2008
    Date of Patent: November 27, 2012
    Assignee: Cisco Technology, inc.
    Inventors: Silvano Gai, Claudio DeSanti, James Paul Rivers
  • Patent number: 8315387
    Abstract: Apparatus and method for a secure communication network using AlphaEta quantum encryption is provided. A polarization insensitive optical receiver based on a 90 degrees hybrid coupler is used for the detection and digitization of optically encrypted signals. Once digitized, such signals can be decrypted, stored, or re-transmitted over arbitrary media such as using RF wireless means. Alternatively, the signal can be generated directly for transmission over RF wireless nodes. The system may include nodes for retransmitting the signal without decrypting it, allowing for secure communication among specific users.
    Type: Grant
    Filed: June 10, 2009
    Date of Patent: November 20, 2012
    Assignee: NuCrypt LLC
    Inventors: Gregory S. Kanter, Daniel Reily
  • Patent number: 8311224
    Abstract: A system and a method with quantum cryptography authentication. The system includes an optical link connecting a sender and a receiver. The sender transmitting a first optical pulse and a second optical pulse having a defined time delay therebetween. The first pulse is modulated with a first authentication phase shift; and the second pulse is modulated with phases selected from one basis of two non-orthogonal bases, and encoded with one of two orthogonal states within the one basis based on an information of the sender, and with a second authentication phase shift. The receiver includes a splitter receiving and splitting the first and the second pulse into pulses of interest. The split pulses of interest are modulated with the first authentication phase shift; and the second authentication phase shift, respectively. The receiver includes a second coupler whereby the split pulses of interest arrive at the second coupler simultaneously.
    Type: Grant
    Filed: October 17, 2008
    Date of Patent: November 13, 2012
    Inventors: Zhihong Chen, Jingyi Wang