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7623657 |
Methods and apparatus for secure and adaptive delivery of multimedia content
Techniques for securely and adaptively delivering multimedia content. It is assumed that a set of alternate access units for each time slot is obtained. Then, the encryption stream index of each...
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7623656 |
Stream cipher encryption and message authentication
Stream cipher encryption and message authentication. Stream cipher encryption is performed by generating a keystream at the transmitting end from a state value, applying the keystream to plaintext...
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7616762 |
System and method for authenticating/registering network device in power line communication (PLC)
A method and apparatus for protecting privacy in power line communication (PLC) networks. Data transmitted on a PLC network is encrypted according to a network key and can be properly received only...
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7606364 |
Disk drive with flexible data stream encryption
A cipher engine performs cipher processing (encrypting/decrypting) on logical data streams in a physical data stream in a storage device. As the physical data stream changes from a first logical...
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7602915 |
Communication system having plurality of nodes sharing a common cipher key, cipher key dispatching apparatus for use in the system, and anti-theft apparatus utilizing information derived from cipher key utilization
A communication system has a plurality of nodes that perform encrypted communication via a LAN, each using an identical common cipher key. The common cipher key is replaced at fixed or irregular...
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7602909 |
Self-service terminal
A self-service terminal ( 10 ) is described. The terminal ( 10 ) includes a plurality of modules ( 14 ) arranged in a network ( 16 ) so that the modules are operable to communicate using the...
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7602906 |
Cipher for disk encryption
Encryption is provided with additional diffusion components to construct a block cipher with a large and variable block size. The cipher incorporates an encryption system or algorithm such that the...
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7590882 |
System, method and storage medium for bus calibration in a memory subsystem
A cascaded interconnect system with one or more memory modules, a memory controller and a memory bus that utilizes periodic recalibration. The memory modules and the memory controller are directly...
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7590242 |
Selective multimedia data encryption
A conditional access system for multimedia data is disclosed that offers acceptable security at drastically reduced requirements on hardware performance. A selectively encrypted transport stream is...
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7583800 |
Encryption apparatus and method in a wireless communications system
An encryption apparatus and method for generating a ciphertext from an input plaintext of the same length as the ciphertext by parallel processing of the input signal. Since a non-delayed signal is...
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7580520 |
Methods for scaling a progressively encrypted sequence of scalable data
A method for scaling a progressively encrypted sequence of scalable data is disclosed. The method includes associating data with the progressively encrypted sequence of scalable data that...
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7580519 |
Triple DES gigabit/s performance using single DES engine
Security processing circuits are discussed which may be used alone or as part of a network interface device of a host system using a single DES engine to accomplish 3DES processing. The security...
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7571465 |
Information exchanging system, information communication terminal, information exchanging method, and computer product
Information communication terminals for transmitting/receiving information that includes a plurality of elements are connected to each other via a network. A information communication terminal at a...
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7551736 |
Physical layer header scrambling in satellite broadcast systems
Methods and apparatuses for minimizing co-channel interference in communications systems are disclosed. A method in accordance with the present invention comprises scrambling a first header of the...
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7526089 |
Device and method for controlling digital bidirectional communication
An interface block ( 11 ) converts the format of input downstream data (STRM). A CPU ( 12 ) receives the format-converted data (DIF) and realizes the MAC function. A TEK process block ( 13 )...
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7522725 |
Method and apparatus for composable block re-encryption of publicly distributed content
Secure communication from one encryption domain to another using a trusted module. In one embodiment, the invention includes receiving encrypted streamed content encrypted with a first key,...
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7522724 |
System and method of transmission of generalized scalable bit-streams
A method of encrypting a transmission unit of a generalized scalable bit-stream includes, encrypting a plurality of logic units of the transmission unit using a unique encryption key for each logic...
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7512813 |
Method for system level protection of field programmable logic devices
A method for protecting a dynamically reconfigurable computing system includes generating an encoding key and passing the encoding key, through a system level bus, to at least one field...
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7512805 |
Machine readable medium and method for data storage security
A data storage device is secured by extracting timing information encoded within a password-related symbol stream received by the storage device and denying access if the timing information is...
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7512804 |
Data storage security apparatus and system
A data storage device is secured by extracting timing information encoded within a password-related symbol stream received by the storage device and denying access if the timing information is...
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7505589 |
Ternary and higher multi-value digital scramblers/descramblers
Ternary (3-value) and higher, multi-value digital scramblers/descramblers in digital communications. The method and apparatus of the present invention includes the creation of ternary (3-value) and...
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7505588 |
Stream cipher design with revolving buffers
Techniques are disclosed to limit short-term correlations associated with outputs of stream cipher keystream generators. Output values of a generator are paired such that the paired outputs are...
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7502463 |
Methods and apparatus for implementing a cryptography engine
Methods and apparatus are provided for implementing a cryptography engine for cryptography processing. A variety of techniques are described. A cryptography engine such as a DES engine can be...
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7483535 |
Transmission of generalized scalable bit-streams
A method of encrypting a transmission unit of a generalized scalable bit-stream includes, for each atom of the transmission unit, concatenating bit-stream segments that map to the atom to obtain...
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7457419 |
Information processing method and apparatus for encrypting encoded data
The present invention makes it possible to encrypt a portion of a tile image to be subject to wavelet transformation at or above a desired resolution level without the need to manage multiple...
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7454016 |
Data encryption system and method
A data encryption system implemented by running on a cache-equipped computer an encryption program including transformation tables each of which contains a predetermined number of entries. All or...
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7450717 |
Self authentication ciphertext chaining
Existing key encryption approaches are extended by using overlapping portions of encrypted information. Another provision inserts one or more bits of data to ensure correct encryption/decryption....
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7440570 |
Method and apparatus for remote digital key generation
A method and apparatus that uses tha dynamics of chaotic system for the remote generation of a digital key, for use in any encryption algorithm. After initialization, the dynamics of a chaotic...
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7430292 |
Methods and systems for securing information communicated between communication devices
A system is provided for generating information for secure transmission from a first device to a second device. The system comprising a key scheduler for generating a dynamic secret key, a...
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7428306 |
Encryption apparatus and method for providing an encrypted file system
An encryption apparatus and method for providing an encrypted file system are provided. The encryption apparatus and method of the illustrative embodiments uses a combination of encryption...
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7426272 |
Instrumentation privacy methods and apparatuses
The present invention provides methods and apparatuses for implementing communications privacy on a class of two-way wireless control communications. The methods and apparatuses of the present...
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7424112 |
Ciphertext switching for syntax compliant encryption
Systems and methods providing ciphertext switching for syntax compliant encryption are described. In one aspect, intermediate ciphertext is generated from syntax compliant plaintext....
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7421080 |
Method of reconstructing a secret, shared secret reconstruction apparatus, and secret reconstruction system
Secret information is shared by a group of members by giving each member a first share of the information. To reconstruct the secret information, a subgroup consisting of some or all of the members...
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7421076 |
Advanced encryption standard (AES) engine with real time S-box generation
An advanced encryption standard (AES) engine with real time S-box generation includes a Galois field multiplier system in a first mode responsive to a first data block for generating an AES...
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7418098 |
Data type preserving encryption
A method and a system for encryption of a data element in a relational database, wherein each data element includes a string of at least one character. The method includes the steps of: reading the...
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7412605 |
Method and apparatus for variable encryption of data
A system and method for encrypting content in an adaptive manner. Portions of data to be encrypted are identified and an encryption ratio that specifies the one or more portions of data to encrypt...
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7403615 |
Methods and apparatus for accelerating ARC4 processing
Methods and apparatus are provided for improving ARC4 processing in a cryptography engine. A multiple ported memory can be used to allow pipelined read and write access to values in memory....
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7400730 |
Cryptographic communication method in communication system
An RNC server issues an encryption start instruction to a media gateway (MG) and a terminal. The MG and terminal, which have received the encryption start instruction, encrypt U-Plane information...
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7386124 |
Block encoding method and block encoding/decoding circuit
A block cipher method eliminates the overhead associated with key scheduling, decreases the required time for encryption or decryption, and increases the total throughput. A key scheduling circuit...
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7382876 |
Hash function constructions from expander graphs
Hash function constructions from expander graphs are described. In one aspect, an expander graph is walked to compute a hash function. The expander graph is walked using respective subsets of an...
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7380132 |
Data recording method and apparatus, data record medium and data reproducing method and apparatus
An input is ciphered in at least one of a sector forming circuit 13 , a scrambling circuit 14 , a header appendage circuit 15 , an error correction encoding circuit 16 , a modulation circuit ...
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7376826 |
Methods and apparatus for performing encryption and authentication
Methods and apparatus are provided for a cryptography accelerator to efficiently perform authentication and encryption operations. A data sequence is received at a cryptography accelerator. An...
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7366302 |
Apparatus and method for an iterative cryptographic block
A method and apparatus for an iterative cryptographic block under the control of a CPU and without a fixed number of stages. In one embodiment, a first cryptographic block descrambles received...
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7366299 |
Method for encrypting and decrypting data using derivative equations and factors
A data cryptographer encrypts and decrypts character data of any given length using derivative equations and factors. The use of factors and derivative equations introduces the randomness required...
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7360084 |
System, device, and method for controlling access in a multicast communication network
A system, device, and method for controlling access in a multicast communication network uses a centralized host authentication scheme to prevent unauthorized hosts from joining a shared multicast...
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7352862 |
Encryption method, communication system, transmission device, and data input device
An encryption method includes the steps of (a) generating random data including a first part and a second part, the first part specifying an operation to be performed on plain text data and the...
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7346165 |
Apparatus and method for generating scrambling code in mobile communication system
An apparatus generates a scrambling code in a mobile communication system by performing one or more mask operations on an input state value. The apparatus includes a register memory which receives...
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7346161 |
Method and apparatus for designing cipher logic, and a computer product
An optimization processing unit optimizes an input and output bit number of an S-box based on parameters inputted from an input unit. The examples of the parameters are memory capacity of a primary...
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7346160 |
Randomization-based encryption apparatus and method
A method for encryption data subdivided into segments of random lengths. A data source having a state corresponding to initialization parameters and the number of patterns output therefrom provides...
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7340059 |
Programmable scrambler and De-scrambler for digital telephony equipment
A scrambler circuit for digital telephony equipment receives a sequence of input bits, generates the sequence of output bits based on the input bits and stores the sequence of output bits. The...
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