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7620821 |
Processor including general-purpose and cryptographic functionality in which cryptographic operations are visible to user-specified software
A processor including general-purpose and cryptographic functionality, in which cryptographic operations are visible to user-specified software. According to one embodiment, a processor may include...
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7613298 |
System and process for adaptive and progressive scrambling of video streams
A process for distributing digital video sequences in accordance with a nominal stream format including a succession of frames, each frame including at least one digital block regrouping a...
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7613296 |
M6 block cipher system and method for encoding content and authenticating a device
An M 6 block cipher system and method for encoding content and authenticating a device may use an M 6 core. The M 6 block cipher system may include a rotate constant selector selecting one or...
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7613295 |
Cryptographic device and associated methods
A cryptographic device includes an input stage receiving an input data block and a key data block made up of a plurality of sub-key data blocks, and generating a plurality of first signals...
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7602908 |
System and method for using a streaming protocol
An initialization vector (IV) is employed to decrypt a block of a stream that has been encrypted with Cypher Block Chaining (CBC) encryption, without requiring decryption of previous blocks within...
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7599492 |
Fast cryptographic key recovery system and method
A system, method and computer program product for recovering a key used to produce a ciphertext document from a plaintext document, including, in the ciphertext document encrypted using an N-bit...
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7599488 |
Differential power analysis
Information leaked from smart cards and other tamper resistant cryptographic devices can be statistically analyzed to determine keys or other secret data. A data collection and analysis system is...
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7590237 |
Time-multiplexed multi-program encryption system
A system and method are described for greatly increasing the number of services that can be encrypted with existing conditional access equipment. The method is most useful when many digitally...
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7587614 |
Encryption algorithm optimized for FPGAs
Circuits, methods, and apparatus for encrypting and decrypting data using a field programmable gate array. The underlying encryption algorithm is tailored for implementation using programmable...
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7587044 |
Differential power analysis method and apparatus
Information leaked from smart cards and other tamper resistant cryptographic devices can be statistically analyzed to determine keys or other secret data. A data collection and analysis system is...
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7584356 |
Broadcast receiving apparatus
A broadcast receiving apparatus ( 2100 ) performs descrambling implicitly during the access of scrambled information within a broadcast signal by a program. The broadcast receiving apparatus ( 2100...
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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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7570760 |
Apparatus and method for implementing a block cipher algorithm
An apparatus and method for implementing a block cipher algorithm. In one embodiment, a cryptographic unit configured to implement a block cipher algorithm may include state storage configured to...
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7567670 |
Verification information for digital video signal
According to some embodiments, verification information is provided for a digital video signal. For example, a digital video signal including a first portion and a second portion may be determined...
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7564972 |
Arithmetic device and encryption/decryption device
Input data (plain text data or encrypted text data) are latched according to a clock CLK 1 and, after initial transposition thereof, the data are outputted from a selector. The lower-order bits of...
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7562230 |
Data security
In one embodiment, a method is provided that may include encrypting, based least in part upon at least one key, one or more respective portions of input data to generate one or more respective...
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7555121 |
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 running at a...
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7533273 |
Method and system for controlling an encryption/decryption engine using descriptors
Controlling an encryption/decryption device using descriptors may include formatting a first block of memory to contain a generic data template used to control the encryption/decryption device. The...
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7532722 |
Apparatus and method for performing transparent block cipher cryptographic functions
The present invention provides an apparatus and method for performing cryptographic operations on a plurality of input data blocks within a processor. In one embodiment, an apparatus for performing...
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7529368 |
Apparatus and method for performing transparent output feedback mode cryptographic functions
An apparatus and method for performing cryptographic operations on a plurality of input data blocks. In one embodiment, an apparatus for performing cryptographic operations is provided. The...
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7529367 |
Apparatus and method for performing transparent cipher feedback mode cryptographic functions
An apparatus and method for performing cryptographic operations on a plurality of input data blocks within a processor. In one embodiment, an apparatus for performing cryptographic operations is...
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7529366 |
Block encoding/decoding method, circuit, and device
A variable-length block encryption circuit having a simplified structure and that reduces the load on a host computer. A plaintext memory and an encryption/decryption circuit for encrypting or...
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7526086 |
Editing apparatus and editing method
An editing apparatus and method for dividing or combining a data file(s) that is segmented into blocks of a predetermined data length and recorded in a non-volatile memory. An attribute file having...
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7526085 |
Throughput and latency of inbound and outbound IPsec processing
The invention relates to a network interface system for interfacing a host system with a network. The network interface system includes a bus interface system, a media access control system, a...
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7508945 |
Self-corrector randomisation-encryption and method
Method and system wherein that once the input data sequence (X) and the control block (K) have been supplied, the method and system generates always a sequence of randomized-encrypted data (A)...
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7508937 |
Programmable data encryption engine for advanced encryption standard algorithm
A programmable data encryption engine for performing the cipher function of an advanced encryption standard (AES) algorithm includes a parallel look-up table system responsive in a first mode to a...
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7508935 |
Cryptosystem for data security
A method and device for creating ciphertext from plaintext, and for decoding ciphertext, utilizing a tree structure for both encoding and decoding, the tree having leaves which are associated with...
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7506373 |
Method of automatically classifying a set of alarms emitted by sensors for detecting intrusions of an information security system
A method of automatically classifying alerts issued by intrusion detection sensors ( 11 a , 11 b , 11 c ) of an information security system ( 1 ) for producing collated alerts, each alert being...
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7506176 |
Encryption mechanism on multi-core processor
An embodiment describes a method of implementing higher level and more robust encryption by using a multi-core processor. The clear text is segmented into text segments based on predefined segment...
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7506160 |
System and method for enhanced data security in office machine environment
The present invention is directed to a system and method for adding data encryption services to a document processing device. Encryption enablement software, which includes two alternate encryption...
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7505598 |
On-the-fly encryption/decryption for WLAN communications
A communication device for performing cryptographically secured communication in a WLAN (Wireless Local Area Network) network is provided that comprises a security enhancement unit and a MAC...
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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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7505585 |
Method of generating cryptographic key using elliptic curve and expansion in joint sparse form and using same
A method of generating a cryptographic key between two users. First, the users select an elliptic curve. Next, the users select a point P on the curve. Next, the first user selects integers r a ...
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7502464 |
Method of implementing one-to-one binary function and relative hardware device, especially for a Rijndael S-box
A method for implementing one-to-one binary functions defined on the Galois field GF(2 8 ) is very useful for forming fast and low power hardware devices regardless of the binary function. The...
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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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7499542 |
Device and method for encrypting and decrypting a block of data
The purpose of this invention is to propose a new encryption method which offers a high level of security combined with a high execution speed. This aim is achieved by a method to encrypt or...
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7496196 |
Method apparatus and system of performing one or more encryption and/or decryption operations
Embodiments of the present invention provide a method and apparatus of performing on one or more bytes of an input data block at least one predetermined encryption or decryption operation.
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7492894 |
Information-processing apparatus, control method, program and recording medium
A 4-byte LBA (logical block address) specified in a read command is supplied to first and second IV (initialization vector) generation units. The initialization-vector generation units each extend...
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7489780 |
Security integrated circuit
A semiconductor integrated circuit for the processing of conditional access television signals comprises an input interface for receiving encrypted television signals and an output interface for...
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7483532 |
RTP payload format
A data stream is encrypted to form encryption units that are packetized into RTP packets. Each RTP packet includes an RTP packet header, one or more payloads of a common data stream, and a RTP...
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7463735 |
Encoding and decoding methods for secure scalable streaming and related systems
A method and system for securely and scalably encoding data are disclosed. A method and system for decoding data which has been securely and scalably encoding are also disclosed. In one encoding...
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7460666 |
Combinational circuit, encryption circuit, method for constructing the same and program
To provide a high-speed combinational circuit including an S-Box and a method for creating an RO-BDD that defines a configuration of the combinational circuit. The combinational circuit includes a...
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7457947 |
System for processing multiple wireless communications security policies
A system for processing wireless data packets allows for processing packets allows consolidation of security processing. Security processing is performed in accordance with multiple security...
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7457409 |
System and method for performing secure communications in a wireless local area network
A scheme for performing secure communications in a wireless local network. In one aspect of the invention, software hosted on a host processing unit maintains multiple queues. A networking module...
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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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7447902 |
Method for processing multiple wireless communications security policies
A method for processing wireless data packets allows for processing packets allows consolidation of security processing. Security processing is performed in accordance with multiple security...
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7437572 |
Key management device and method for the encrypted storage of digital data words
Key management device for electronic memories and a method for the encrypted storage of digital data words in electronic memories, in which each stored data word is encrypted with a digital...
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7436956 |
Document encryption
Encryption of documents is used to restrict access to such documents to those users who have the appropriate decryption keys. The encryption of documents on public web servers hitherto has...
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7436955 |
Encrypting and decrypting a data stream
The present invention provides methods, systems and apparatus for encrypting and for decrypting a data stream, for securely sending a data stream and for securely receiving a data stream, and for...
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7436954 |
Security system with an intelligent DMA controller
A security subsystem is provided with at least a first security engine, a first set of registers and a control portion to perform a first security operation for each of a first number of data...
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