Abstract: The invention prevents intercepted keys from being used in unauthorized whitebox descrambler modules for the decryption of a ciphertext. Hereto a receiver with a personalized whitebox descrambler is proposed, whereby a part of the descrambling operation of the personalized descrambler is performed in a preprocessing module external to the descrambler.

Abstract: A system and method for embedding data is provided. The method comprises dividing the host data set into a plurality of blocks, wherein each block comprises a plurality of elements, generating a pattern connecting the elements of each block; and embedding data on the elements of block based on the pattern.

Abstract: A multi-carrier data communication is selectively operable in one of different communication modes which result in differently structured communication signals, the communication being configured for processing a data item intended to be transmitted to generate different transmission candidate data; selecting one of the transmission candidate data for transmission; selecting one of the communication modes based on the selected data item; and transmitting the selected data item using the selected communication mode.

Abstract: An authentication method including operation of a personal token, a personal token for a terminal in a communication network, an authentication server, and a computer program for an authentication server. The secure server producing derived key material on the basis of a random and a secret key (K), said personal token including program instructions for re-computing the derived key material (Ck, Ik) on the basis of the received random and the secret key (K) as stored in the personal token. The personal token includes program instructions for using a re-computed part of the derived key material in order to interpret the received additional data.

Abstract: The present claims relate generally to steganographically encoding and decoding of audio signals. One claim recites a method of embedding auxiliary information in data representing audio.

Abstract: A system and method are provided for selecting frames of a compressed video stream that may be used for client-side watermarking. In general, a content source evaluates a number of Intra-Frames (I-Frames) in the compressed video stream using a sample watermark that is similar to actual watermarks that may be used for client-side watermarking. More specifically, each of a number of I-Frames in the compressed video stream is evaluated by first watermarking the I-Frame with the sample watermark. Associated frames in the compressed video stream are then decoded using the watermarked I-Frame. An error value for the decoded video frames is then computed. If the error value is outside of a predetermined error threshold range, the I-Frame is selected as an I-Frame that may be used for client-side watermarking.

Abstract: Reversible and self reversing multi-value scrambling functions created by applying multi-value inverters are disclosed. The generation of possible multi-value inverters is also presented. Corresponding multi-value descrambling functions are also disclosed. The multi-value functions are used in circuits that scramble and descramble multi-value signals. The multi-value functions can also be used in signal generators. Such signal generators do not require the use of multipliers. The auto-correlation of the signals generated by the signal generators is also presented. Electronic circuits that implement the multi-value functions are also described.

Abstract: A method of partially scrambling a data stream (6) including transport stream packets (7), each transport stream packet (7) having a header (8) and a payload (9), wherein a sequence of transport stream packets (7) has payloads carrying encoded data elements, arranged in units (15), includes: selecting transport stream packets (7) forming a subsequence of the sequence, and scrambling at least part of the payloads (9) of each transport stream packet (7) in the subsequence. The method further includes monitoring the payloads (9) of at least some of the transport stream packets (7) in the sequence for the presence of data (22) indicating a boundary between two subsequent units (15), and, for selected units (15), including at least one of the transport stream packets (7) carrying data forming part of the selected unit (15) in the sub-sequence.

Abstract: Control system of an electronic instrument for metrological measurements, comprising an electronic local processing unit including a handling application of said instrument. The system includes a control application for said handling application, which can be associated with said local processing unit, said control application being suitable for generating a univocal certification code for the application.

Abstract: Systems and methods for multiple level control of access privileges to protected media content are disclosed. In one embodiment, first data is associated with media content. Different versions of the media content are produced using the first data. Each of the different versions include one or more portions of the media content. The one or more portions are selected using the first data. Second data is associated with the different versions. The second data identifies respective protection attributes used to encrypt the different versions. The respective protection attributes correspond to respective keys that provide respective levels of access to the media content.

Abstract: Unicode character data is received for transcoding. The Unicode character data is transcoded to an intermediate value. The intermediate value is enciphered. The enciphered intermediate value is transcoded back to Unicode-compatible character data. The transcoding includes assembling character values from the Unicode character data into one or more blocks and representing the assembled character values in a compact form.

Abstract: A method and apparatus for generating a data structure to be embedded in a ranging signal or in a synchronization preamble of a digital signal are disclosed. In a preferred embodiment, a plurality of blocks 0 through i, where i is an integer, are formed from random sequences of components A0 to Ai, each of the components being N bits, and each block including A0 through Ai components. A plurality of random sequences of components B0 through Bi, where i is an integer, of 2N bits is also formed. The components A0 through Ai in blocks 0 to i are formed into a matrix and the polarities of the components A0 through Ai are made to correspond to the polarities of a Hadamard matrix. The components A0 through Ai of each block are randomly permuted with components B0 through Bi. When the permuted components of the blocks are embedded in a ranging signal or in a synchronization preamble of a signal, the blocks will appear to an unauthorized user of the signal as being unrelated.

Abstract: Methods and systems are arranged to control the decryption of an encrypted application in a device executing the application, the device arranged with a secure environment to which access is strictly controlled by a device processor. The application is divided into an installation part that establishes proper set up of the application and a protected part which is to be executed in the secure environment. An advantage with the invention is that the application provider has the freedom to control the decryption of the application software. Since it is performed in the secure environment, the owner of the device is unable to access the application and thereby copy, read or manipulate it. Moreover, the application provider handles the installation of the encrypted application and the key for decrypting the application, and is thus given the possibility to handle the encryption/decryption schemes and the key management.

Abstract: There is provided a scrambling apparatus and a method of operating the same. A scrambling apparatus according to an aspect of the invention may include: a memory unit storing and providing a plurality of previously generated scrambling initial state codes; and a scrambling unit reading at least one of the plurality of scrambling initial state codes stored in the memory unit to generate a scrambling code in order to scramble an input signal, so that scrambling speed can be significantly increased.

Abstract: An apparatus comprising a first circuit and a second circuit. The first circuit may be configured to analyze an audio-video data stream to determine watermark appropriate information for the audio-video data stream. The second circuit may be configured to communicate the watermark appropriate information either in-band with or out-of-band from a bit stream communicating the audio-video data.

Abstract: Tri-level scrambling in a digital to analog converter system is achieved by, in response to a tri-level binary code input, disabling a negative data directed scrambler circuit when the input code is in the positive cycle portion, disabling a positive data directed scrambler circuit when the input code is in the negative cycle portion and disabling both scrambler circuits upon a zero input code for reducing low level distortion due to a reversal of current during crossover between those cycles.

Abstract: Systems, methods and computer program products for firewall use of certified binaries. Exemplary embodiments include a method including reading a plaintext component from a digital signature, searching the plaintext component for an identifier, reading in a TotalTCPIPPorts field for a total number of sockets to be opened for an application, reading in ports and descriptions for each of the ports, displaying information from the plaintext component up to a block including the identifier, the port being opened and the port description, prompting an instruction, displaying on the screen information from the plaintext component up to a block including the identifier, displaying a warning that the application is opening additional ports beyond the default number specified displaying a warning that opening the additional ports should be avoided and prompting the instruction.

Abstract: A system effecting a data reproducing method for a plurality of devices, for sending and receiving data by authenticating the plurality of devices with each other, said data reproducing method including: selecting, from a plurality of descrambling methods, a descrambling method corresponding to a type of said data, executing authentication by an authenticating method corresponding to the selected descrambling method, where the authenticating method is selected from a plurality of authenticating methods, and reproducing said data.

Abstract: A data receiving device includes an elastic buffer which receives data as receiving data and adjusts timing with a sender, the data being scrambled and sent from the sender, an interpolation circuit which performs predetermined interpolation processing on the data subjected to timing adjustment by the elastic buffer to output the data, and a descramble circuit which descrambles the data output from the interpolation circuit. The receiving data includes data set for adjusting timing. The data set is for adjusting timing with the sender. The interpolation circuit replaces existing data with data for adjusting timing and outputs the data for adjusting timing as required after first receiving normal data for adjusting timing so that a desired number of data for adjusting timing is included in the data set for adjusting timing.

Abstract: The present invention relates to a technology of paring a secure micro (SM) and a transport processor (TP) in a downloadable conditional access system (DCAS). More specifically, predetermined security components generated by a trusted authority which is a certificate authority are previously embedded into the SM and the TP, and pairing between the SM and the TP is performed by association of the security components with the TA. Accordingly, safe pairing can be assured and the leakage of security information from the SM by malicious hacking can be prevented.

Abstract: The present invention relates to a system and a method for transmitting data between a first terminal and a communication network access point. The method may comprise the steps of defining a first set of scrambling codes and a second set of scrambling codes different from the first set of scrambling codes. Further, the method may comprise defining a first selection scheme for a first parameter. The method may still further comprise determining a current parameter value for the first parameter and evaluating the current parameter value on the basis of the first selection scheme and selecting a scrambling code from the first set of scrambling codes or the second set of scrambling codes based on the evaluation. Even further, the method may comprise packaging and transmitting data between the first terminal and the communication network access point using the selected scrambling codes.

Abstract: In accordance with certain aspects, data is received from a calling program. Ciphertext that includes the data is generated, using public key encryption, in a manner that allows only one or more target programs to be able to obtain the data from the ciphertext. In accordance with another aspect, a bit string is received from a calling program. An identifier of the calling program is checked to determine whether the calling program is allowed to access data encrypted in ciphertext of the bit string. The data is decrypted using public key decryption and returned to the calling program only if the calling program is allowed to access the data.

Abstract: An apparatus generally having a first circuit and a second circuit is disclosed. The first circuit may be configured to (i) divide a plain text into at least three input blocks and (ii) generate at least three scrambled blocks by scrambling the input blocks using a first cipher process. The first cipher process may be configured such that a first of the input blocks does not affect the generation of a last scrambled block. The second circuit may be configured to (i) generate at least three output blocks by de-scrambling the scrambled blocks using a second cipher process and (ii) reconstruct the plain text from the output blocks. The second cipher process may be configured such that a first of the scrambled blocks affects the generation of all of the output blocks.

Abstract: An information processing apparatus includes: a plurality of digital broadcast stream data descramblers configured to receive broadcast streams and to output descrambled data by descrambling the broadcast streams; a block data buffer configured to buffer access requests output from the digital broadcast stream data descramblers to a B-CAS card per B-CAS access block units; and an arbiter configured to arbitrate the B-CAS card access requests.

Abstract: An air traffic control automatic dependent, WAAS/GPS based, surveillance system (ADS), for operation in the TRACON airspace. The system provides encryption protection against unauthorized reading of ADS messages and unauthorized position tracking of aircraft using multilateration techniques. Each aircraft has its own encryption and long PN codes per TRACON and transmit power is controlled to protect against unauthorized ranging on the ADS-S aircraft transmission. The encryption and PN codes can be changed dynamically. Several options which account for available bandwidth, burst data rates, frequency spectrum allocations, relative cost to implement, complexity of operation, degree of protection against unauthorized users, system capacity, bits per aircraft reply message and mutual interference avoidance techniques between ADS-S, ADS-B Enroute and Mode S/ATCRBS TRACON are disclosed. ADS messages are only transmitted as replies to ATC ground terminal interrogations (no squittering).

Abstract: A watermark embedding method for embedding a secret message sequence in a document. The techniques include obtaining layout information of the document, extracting a digest of the document by using a Hash function, calculating embedded positions where the secret message sequence is embedded in the document, and dispersedly hiding the secret message sequence in each of the calculated embedded positions by altering the layout of the document. Also provided is a watermark embedding apparatus, a corresponding watermark detecting method and apparatus, and a method and system for detecting document integrity. The integrity of documents in various forms can be detected, and secret information to be hidden can be embedded therein and extracted therefrom. The techniques described are not limited to the document either in soft copy or in hard copy and have good robustness.

Abstract: Embodiments of the present invention provide an acknowledgment channel design in which an acknowledgment sequence is scrambled with a station-specific scrambling sequence. Other embodiments may be described and claimed.

Abstract: The instruction code including an instruction code stored in the area where the encrypted instruction code is stored in a non-rewritable format is authenticated using a specific key which is specific to the core where the instruction code is executed or an authenticated key by a specific key to perform an encryption processing for the input and output data between the core and the outside.

Abstract: A communication device, operable to communicate with an electronic device via a network, may include a storage section, an image capturing section, and an identification section. The storage section may store device identification information identifying the electronic device and one or more face images of one or more users that use the electronic device while associating the device identification information with each of the face images of the users of the electronic device. The image capturing section may capture an image of a face of the user of the electronic device. The identification section may identify the electronic device on the basis of the device identification information stored in association with one of the stored face images that matches the captured image of the face of the user of the electronic device.

Abstract: A transmitter classifies quantum pulses into supervisory pulses and message pulses, and assigns each message pulse to a message bit. Each message pulse is then encoded using a coding base randomly selected from a set of coding bases, and with a polarity relative to the coding base that depends on the value of the corresponding message bit. Supervisory pulses are encoded using a coding base different from the coding bases in the aforementioned set. The encoded pulses are sent to a recipient over a quantum channel. The transmitter also informs the recipient of the positions of the supervisory pulses. The recipient detects the pulses relative to a locally selected coding base, producing a zero-click, a one-click or a two-click.

Abstract: A technique to improve the performance of virtualized input/output (I/O) resources of a microprocessor within a virtual machine environment. More specifically, embodiments of the invention enable accesses of virtualized I/O resources to be made by guest software without necessarily invoking host software. Furthermore, embodiments of the invention enable more efficient delivery of interrupts to guest software by alleviating the need for host software to be invoked in the delivery process.

Abstract: A cryptographic device protocol provides a generic interface allowing pre-OS applications to employ any of a variety of cryptographic devices within the pre-OS environment. The generic interface can be used independent of the specific cryptographic devices and is independent of the cryptographic or hashing algorithms used by each device. Cryptographic functions may be performed in the pre-OS environment by pre-OS applications communicating with cryptographic device drivers using the cryptographic device protocol that is independent of the cryptographic devices. Each cryptographic device may be identified by a unique device identifier and may have a number of keys available to it, with each key being identified by a unique key identifier.

Abstract: Serving cell change procedures are provided from a target cell that instructs a mobile device to change its serving cell to the target cell. Receiving the serving cell change instruction from the target cell can help mobile device to receive the instruction in areas were a signal from a current serving cell is rapidly deteriorating. An acknowledgement can be sent from mobile device to target cell and can be based on a scrambling code change and/or can be based on a CQI31.

Abstract: To solve a problem that unless all of a plurality of AICH signature states are correctly decoded, the contents of reception results cannot be recognized and the error rate of signature decoding will be high. In this embodiment, a base station uses, out of a signature combination, the signature of at least one predetermined position to indicate information containing a preamble reception result and uses the signature of a position other than the predetermined position to indicate a transmission profile information number of an uplink channel for notification to a user equipment. Thus, the error rate related to reception results can be reduced as compared with the case where a single signature combination is used to notify all pieces of information.

Abstract: One embodiment of the present invention provides a system that facilitates authenticating a user at a computer system. During operation, the system creates an authentication profile and assigns the authentication profile to a user, wherein the authentication profile specifies authentication criteria. Next, the computer system receives a login request from the user, and in responding to the login request, the computer system checks if the authentication criteria in the authentication profile are satisfied. If so, the system allows the user to login. If not, the user is prevented from logging into the computer system.

Abstract: A method and system for providing secure communication between a server and a remote client utilizing a polymorphic software platform. In various embodiments, the system provides mixed mode data entry, meaningless field entries and randomly generated false entries interpolated into the real entries for providing a secure system of communication such that a third party has no repeatable method of decoding the information transmitted.

Abstract: In an OCDM-based photonic encryption system by applying random noise on unused channels and varying the inter-code phases on realistic framing repetition, an OCDM-based encryption system with provable security guarantees results.

Abstract: A controller of a recording device issues a secure command to a storage device, and then waits the time estimated necessary for the storage device to execute the secure command before issuing the next secure command. When a controller of the storage device is executing the previous command, it notifies the recording device of being in process. When the previous command has been completed normally, the controller moves to the next process. Information for estimating the execution time of the command is obtained from the storage device in advance.

Abstract: An approach to data communication makes use of a protocol for encoding data on a serial link that provides both a run length limiting function and a frame marking function, while minimizing communication overhead over the data bearing portions of the signal, and while limiting latency introduced into the communication. In some examples, a single bit is added as a frame marker in such a way that a single bit frame marker also limits run length.

Abstract: In accordance with certain aspects, data is received from a calling program. Ciphertext that includes the data is generated, using public key encryption, in a manner that allows only one or more target programs to be able to obtain the data from the ciphertext. In accordance with another aspect, a bit string is received from a calling program. An identifier of the calling program is checked to determine whether the calling program is allowed to access data encrypted in ciphertext of the bit string. The data is decrypted using public key decryption and returned to the calling program only if the calling program is allowed to access the data.

Abstract: Provided in a reception device (10) for receiving a transmission signal (US) in which, adhering to a communications protocol, reception data (ED) can be transmitted to the reception device (10) from a transmission device (2, 3) are reception means (12) for receiving the transmission signal (US), and evaluation means (16) for evaluating the received transmission signal (US) and for emitting a bit sequence (BFT) received in the transmission signal (US), which bit sequence (BFT) may contain bits of reception data (ED) transmitted from the transmission device (2, 3) but also bits (SB) occasioned by an interference to the transmission signal (US), and checking means (18) for checking whether the received bit sequence (BFT) infringes a rule of the communications protocol, wherein the reception device (10) is designed to continue with the reception of the transmission signal (US) and the checking of the received bit sequence (BFT) following the occurrence of an infringement of the communications protocol.

Abstract: Under a sectorized cell architecture in a mobile communication system, a scrambling code applied to multiplication of a transmission signal is selected and switched among different types of downlink physical channels in a unified manner. One of multiple transmission signals to be transmitted on a corresponding one of the different types of downlink physical channels is generated. A first code is selected according to the type of the physical channel to enable multiplying the transmission signal by the first code. The transmission signal is multiplied by an intracell common scrambling code used in common among sectors in a same cell in addition to or in place of the multiplication of the first code. The transmission signal multiplied by at least one of the first code and the intracell common scrambling code is transmitted on the corresponding physical channel.

Abstract: A system for detecting and identifying the identity of a base station or cell which transmits a scrambling code is provided. According to one aspect of the system, the system is used to perform scrambling code detection of eight (8) primary cells (each scrambling code's X-component being spaced sixteen (16) chips apart) in a group. According to another aspect of the system, a single scrambling code generator is used to generate a master scrambling code. The master scrambling code is then used to create individual scrambling codes which are used in correlation with received signals to detect in parallel which one of the eight (8) possible primary cells in the group transmitted the received signals. According to yet another aspect of the system, each of the correlators maintains a corresponding X-component segment of the master scrambling code.

Abstract: The present invention provides digital watermarks through multiple channels. The channels can include, e.g., visible, ultraviolet and infrared channels. The non-visible channels can be selected to fluoresce either in the visible or IR/UV spectrums upon the appropriate illumination in the infrared or ultraviolet spectrums. The watermarks in the various multiple channels can cooperate to facilitate watermark detection or to authenticate an object in which the watermarks are embedded. In other implementations the multiple watermarks include so-called orientation components. A relative relationship between the orientation components is used to convey data.

Abstract: Systems and methods are provided that allow multiple transmitting network devices to transmit under an orthogonal frequency divisional multiple access (OFDMA) mode to a receiving network device. The multiple transmitting network devices may be configured to perform constellation scrambling on the symbols they will be transmitting using a predetermined scrambling sequence. They may be further configured to synchronize their use of the sequence, for example, by advancing the sequence for each available subcarrier, such that the receiving device may view the payload as if it were sent by a single transmitter. Accordingly, these multiple transmissions may be descrambled using only one instance of a sequence generator.

Abstract: A signal transmitting method according to an exemplary embodiment of the present invention includes channel-coding broadcasting channel information by using a first scrambling code in a first frame within a broadcasting channel information updating period including a plurality of frames, and channel-coding the broadcasting channel information by using a second scrambling code in a second frame within the broadcasting channel information updating period. The second scrambling code is different from the first scrambling code.

Abstract: A signal processing circuit is configured by connecting a plurality of basic circuits connected in series, each of the basic circuits comprising an arithmetic circuit subjecting a first input signal and a second input signal to a signal processing; a first selection circuit outputting the first input signal or an output signal of the arithmetic circuit; and a second selection circuit outputting the second input signal or an output signal of the arithmetic circuit, so as to make it possible to change operations of the circuit as a whole by properly making a selection on which signal should be output with the aid of the first and second selection circuits, and to execute different signal processing on a single circuit depending on the selection.

Abstract: A method of digital watermarking which can resist against local geometrical distortions such as random bending attack, global geometrical distortions as well as projective transforms, but does not necessary require the recovering of global affine transform or even the repetition of the same watermark pattern. Further, the watermark can resist common global affine transformations such as rotation, scaling, and changes of aspect ratio, cropping as well as other types of operations such as filtering, lossy compression, printing/scanning or detection of watermark in front of video, web or photo camera or any imaging device.

Abstract: In a method and system for printing of sensitive data, encrypted sensitive data to be printed is transferred to a printing device having a printing unit. This sensitive data to be printed is decrypted to create decrypted sensitive data. The decrypted sensitive data is converted into control signals for activation of the printing unit. The decrypted sensitive data is stored in a non-volatile memory such that the decrypted sensitive data are distributed in a plurality of memory segments of the non-volatile memory where a relationship of the memory segments is stored as relationship data independently of the stored decrypted sensitive data. The decrypted sensitive data is printed with the printing unit on a recording medium.

Abstract: An image forming apparatus has a micropattern reading unit, an encoded image generating unit and a code printing control unit. The micropattern reading unit reads a micropattern of a sheet. The encoded image generating unit generates an encoded image. The encoded image has the micropattern and a private key of a user. The code printing control unit prints the encoded image on the sheet to produce a certificate sheet.