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7299356 |
Key conversion method for communication session encryption and authentication system
An interactive mutual authentication protocol, which does not allow shared secrets to pass through untrusted communication media, integrates an encryption key management system into the...
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7283628 |
Programmable data encryption engine
A programmable data encryption engine for performing the cipher function of the data encryption standard (DES) algorithm includes a Galois field linear transformer system (GFLT) responsive to a...
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7277541 |
Method and system for using a portion of a digital good as a substitution box
A portion of a digital good is selected to be used as a substitution box (S-box) in encrypting at least another portion of a digital good. The digital good being encrypted can be the same digital...
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7269738 |
High throughput and flexible device to secure data communication
The present invention provides a device for securing data communication, said device being part of a system and comprising a dynamically reconfigurable logic array comprising separate blocks for...
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7269564 |
Method and apparatus to indicate an encoding status for digital content
A method of determining an encoding rate for digital content. According to the method, the a sample of the content data is encoded for a predetermined period of time. The encoding rate is...
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7263186 |
Speed-up hardware architecture for CCMP encryption protocol
A speed-up hardware architecture used in wireless encryption/decryption operation comprises: a plurality of operation units, that each operation unit is capable of accomplishing a designated...
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7263185 |
Key based decipher including its generation, distribution and usage
A decipher key based decipher with at least a portion of the decipher key dissolved into the decipher is disclosed. The decipher includes in-line instructions specifically designed to incrementally...
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7260218 |
Configurable circuit with configuration data protection features
A configurable circuit that includes configuration data protection features, and related methods, are described herein.
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7257229 |
Apparatus and method for key scheduling
A key scheduler for encryption/decryption produces a new ciphering key by a key expansion process or recovers a previous ciphering key by an inverse expansion process. The key scheduler includes a...
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7254231 |
Encryption/decryption instruction set enhancement
A structure and associated method to implement encryption/decryption under the Data Encryption Standard (DES). Several additional instructions are included in the instruction set of a general...
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7251325 |
Public key cryptosystem using finite non abelian groups
The present invention relates to a method of encryption and decryption comprises the steps of: selecting a generator and a first element of a first non abelian group, respectively, computing a...
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7225337 |
Cryptographic security method and electronic devices suitable therefor
A portable electronic security module including an electronic data storage device, a secret private customer key and a public customer key stored in the electronic data storage device as a first...
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7206748 |
Multimedia player toolkit for electronic content delivery
A method provides a collection of data structures and subroutines in a software toolkit, for developing an application for playing digital content data. The method comprises steps of receiving...
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7200226 |
Cipher block chaining decryption
According to some embodiments, cipher block chaining decryption is performed.
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7194090 |
Encryption apparatus, decryption apparatus, expanded key generating apparatus and method therefor, and recording medium
Expanded key schedule circuit for common key encryption system in which expanded keys are used in a predetermined order in data randomizing process for encryption and in a reversed order in data...
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7190790 |
Multiple module encryption method
The present invention proposes an encryption/decryption method able to resist against various attack strategies such as Simple Power Analysis, Timing Analysis or Differential Power Analysis. The...
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7177421 |
Authentication engine architecture and method
Provided is an architecture (hardware implementation) for an authentication engine to increase the speed at which multi-loop and/or multi-round authentication algorithms may be performed on data...
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7174015 |
Methods and apparatus for variable radix scalable modular multiplication
Methods and apparatus for Montgomery multiplication process a multiplier operand in k-bit radix-digits, wherein k corresponds to a radix r=2 k . A multiplicand operand and a modulus are processed...
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7162033 |
Countermeasure procedures in an electronic component implementing an elliptical curve type public key encryption algorithm
Elliptical curve based cryptographic algorithms are public key algorithms offering a shorter calculation time and smaller key sizes in comparison with RSA. In a smart card type environment, these...
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7162634 |
Method for providing security on a powerline-modem network
A method for creating a secure powerline modem network transmits a private key (y) individually to each of the plurality of powerline modem devices ( 22 ) to be secured in a network such that each...
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7151829 |
System and method for implementing a hash algorithm
A system and method for generating a message digest comprising: receiving a block of data and processing the block of data to achieve a message digest, the processing of the block of data including...
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7146006 |
Method for improving a random number generator to make it more resistant against attacks by current measuring
Two methods for random number generation are modified to make them more resistant to attacks by current measurements. The methods are particularly designed to be implemented in electronic devices...
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7142675 |
Sequence generator and method of generating a pseudo random sequence
A sequence generator for generating a pseudo random sequence for random number generation or a stream cipher engine includes a plurality of linear feedback shift registers operable to generate a...
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7142671 |
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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7142673 |
Method for the cryptographic conversion of L-bit input blocks of digital data into L-bit output blocks
The present invention relates to the field of electric communication and computer engineering, and more particularly, to the field of cryptographic methods and devices for ciphering digital data....
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7136487 |
System and method for automatically protecting private video content using embedded cryptographic security
A system and method for automatically protecting private video content using embedded cryptographic security is disclosed. A substantially continuous video signal representing raw video content is...
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7123717 |
Countermeasure method in an electronic component which uses an RSA-type public key cryptographic algorithm
A countermeasure method in an electronic component which uses an RSA-type public key cryptographic algorithm. A first countermeasure method uses a random calculation for each new execution of the...
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7106860 |
System and method for executing Advanced Encryption Standard (AES) algorithm
A system and method is presented for enciphering information using the Advanced Encryption Standard (AES) algorithm in which a subprocessor is configured to manipulate data as it is being loaded...
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7103576 |
System for providing cardless payment
The method and system of the invention provide a variety of techniques for using a selected alias and a selected personal identification entry (PIE) in conjunction with use of a transaction card,...
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7103181 |
State-varying hybrid stream cipher
In one embodiment, a state-varying hybrid stream cipher operating within a computing device. The state-varying hybrid stream cipher comprises at least two software routines. A first routine is...
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7103180 |
Method of implementing the data encryption standard with reduced computation
An efficient software implementation of the round function of the Data Encryption Standard (DES) involves mathematical transformations performed on the DES round function and the DES round key...
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7100043 |
LIFM algorithm for security association database lookup in IPSEC application
Current applications used in security system for encryption/decryption/authentication require intense CPU computation for an SAD search. Therefore, a part of the SAD is planted into an ASIC in...
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7099850 |
Methods for providing cardless payment
The method and system of the invention provide a variety of techniques for using a selected alias and a selected personal identification entry (PIE) in conjunction with use of a transaction card,...
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7099470 |
Encryption apparatus using data encryption standard algorithm
An encryption apparatus using a DES encryption algorithm is disclosed. The apparatus for encrypting 64-bit plain text blocks includes: input buffering unit for receiving a plain text block...
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7092525 |
Cryptographic system with enhanced encryption function and cipher key for data encryption standard
An enhanced cryptographic system of high security for a ciphering of a block of data bits under control of a cryptographic key and for generating a one way transformation of a block of data bits...
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7079651 |
Cryptographic method and apparatus for non-linearly merging a data block and a key
A method and apparatus for cryptographically converting a digital input data block into a digital output data block. The apparatus has an input for supplying the input data block and a further...
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7076059 |
Method and apparatus to implement the data encryption standard algorithm
A method and apparatus to encipher a block of data using the data encryption standard comprising exclusive-oring, using an exclusive-or gate, the output from a merged permutation and expansion...
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7073072 |
Method to prevent power dissipation attacks on a cryptographic algorithm by implementing a random transformation step
A data protection method using a cryptographic algorithm comprising at least one execution cycle of repetitive operations for processing data elements (K 2 , R 1 ) so as to generate encrypted...
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7068786 |
Dual use block/stream cipher
A dual use block/stream cipher is provided with a first key section and a data section. The first key section is to be initialized with a first cipher key, and to successively transform the first...
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7058603 |
Transaction system
A transaction system includes a network of terminals and a network of servers each form separate communication networks for impersonal transaction and anonymous transmission. No reference to an...
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7050582 |
Pseudo-random one-to-one circuit synthesis
A method of defining a transformation between an input signal and an output signal. The transformation may implement a pseudo-random one-to-one function that may be implemented in hardware and/or...
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7043017 |
Key stream cipher device
A symmetric key stream processor 60 that encrypts and decrypts text in accordance with the RC4 algorithm has a main processing block 62 and a host interface 64 . The main processing block 62 ...
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7043016 |
Substitution-box for symmetric-key ciphers
An input data block is cryptographically converted into an output data block; by performing a non-linear operation on the input data block using an S-box based on permutations. The S-box is...
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7035831 |
Reversible generation process of altered payment card by means of a mathematical algorithm
The process consists of carrying out the first phase of generating the transaction signature ( 9 ), with prior authentication by the cardholder, in the issuing centre ( 3 ) through its...
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7035405 |
Method for establishing a common key between a central station and a group of subscribers
The present invention provides a method for generating a common key between a central station and a group of subscribers, e.g., at least three subscribers, exhibit the same standard of security as...
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7032111 |
Method for optimizing of data transmission
The invention is related to optimization of data transmission in TCP/IP networks, particularly to problems created by transmission of encrypted traffic. According to the invention, an indication of...
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7006627 |
Cipher block chaining mode in encryption/decryption processing
A data encryption/decryption circuit is presented that can be implemented in a field programmable gate array. First and second logic components are provided which are controlled by first and second...
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7003107 |
Hybrid stream cipher
In one embodiment, a hybrid stream cipher operating within a computing device. The hybrid stream cipher comprises at least two software routines. A first routine is responsible for dividing...
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7003106 |
Efficient method for multiplication over galois fields
The improved AES processing method provides an efficient alternative to both Mips intensive multiplication and to conventional table lookup, used to multiply terms over a Galois field (GF). The...
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7000111 |
Method for masking secret multiplicands
A mobile terminal for use in a mobile communications system includes a SIM card storing subscriber related data. For security, the SIM card performs secret cryptographic calculations with secret...
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