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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...
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...
7606369 Process for establishing a common cryptographic key for N subscribers  
A process is described which can be used to generate a cryptographic key for a group of subscribers whose number is subject to change. The process can further provide that even after the group key...
7606363 System and method for context switching of a cryptographic engine  
A cryptographic system, method, and device for implementing cryptographic functions designed to protect data is provided. The method includes (a) providing an algorithm processing unit, (b)...
7606362 FPGA configuration bitstream encryption using modified key  
Circuits, methods, and apparatus that prevent detection and erasure of a configuration bitstream or other data for an FPGA or other device. An exemplary embodiment of the present invention masks a...
7602916 Access-protected data carrier  
The invention relates to a data carrier having a semiconductor chip ( 5 ) with at least one memory. The memory contains an operating program that is able to perform at least one operation (h). In...
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...
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...
7565552 Method for protecting against manipulation of a controller for at least one motor vehicle component and controller  
The invention relates to a method for protecting against manipulation of a controller for at least one motor vehicle component, the control device ( 1 ) comprising at least one microcomputer (μC)...
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...
7558386 Countermeasure method in an electronic component using a secret key cryptographic algorithm  
In an electronic component using a secret key cryptographic algorithm, one operation utilizes a first table for supplying output data from input data. The output data, and/or derived data, is...
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...
7551737 Cryptographic keys using random numbers instead of random primes  
A system and method for providing cryptographic keys which are usable in a network of connected computer nodes applying a signature scheme. The method employs: generating a random secret key usable...
7551056 Use-authorization device for security-related applications  
This description is given of a use-authorization device for security-related applications, in particular access control to secure areas or securing vehicles with a user operated key unit for...
7545928 Triple DES critical timing path improvement  
Improved security processing circuits are discussed which may be used alone or as part of a network interface device of a host system using a DES engine to accomplish 3DES processing. The security...
7536011 Tamper-proof elliptic encryption with private key  
An encryption device performs elliptic curve encryption using a secret key. The encryption device includes an operation unit for performing scalar multiplication of a point on an elliptic curve a...
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...
7532726 Encryption/decryption device and method, encryption device and method, decryption device and method, and transmission/reception apparatus  
The encryption/decryption device includes: a data structure analysis block for receiving encrypted data or data to be encrypted and outputting control data and also the encrypted data or the data...
7532720 Utilizing SIMD instructions within montgomery multiplication  
An architecture and methodology for implementing Montgomery multiplication on a computer system that supports SIMD instructions is described.
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...
7526656 Encryption/decryption system and method for the same  
An encryption/decryption system capable of supplying data only to a user making a request. A computer encrypts data with a common key, encrypts the common key with a public key, and transmits the...
7525202 Quantum computational systems  
Apparatus and methods for performing quantum computations are disclosed. Such quantum computational systems may include quantum computers, quantum cryptography systems, quantum information...
7509292 Authentication of consumable items  
This invention concerns a consumable authentication method for validating the existence of an untrusted chip. A random number is encrypted using a first key and sent to an untrusted chip. In the...
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...
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...
7499552 Cipher method and system for verifying a decryption of an encrypted user data key  
A cipher method for verifying a decryption of an encrypted user data key used to encrypt user data prior to an encryption of the user data key with an encryption key. The cipher method involves a...
7499543 Linear conversion circuit and encryption circuit  
A data processing method for specifying linear conversion for making the number of active S-box maximum, wherein a plurality of linear conversion candidates satisfying a restriction on a circuit...
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.
7479880 Process for the integrity check of lots of individual package units  
A process for integrity check of lots of individual package units which comprises combining at least one RFID tag and a container which contains a large number of individual package units wherein...
7471791 Method for countermeasure in an electronic component using a secret key algorithm  
A countermeasure method in an electronic component using a secret key algorithm K on an input message M executes an operation O PN (D) on input data D. A random value, of one first random...
7469338 System and method for cryptographic control of system configurations  
Systems and methods are disclosed for using cryptographic techniques to configure data processing systems. A configuration manager cryptographically controls the configuration of a system by...
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...
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...
7447310 Lean multiplication of multi-precision numbers over GF(2m)  
Multi-precision multiplication methods over GF(2 m ) include representing a first polynomial and a second polynomial as an array of n words. A recursive algorithm may be used to iteratively...
7443981 Execution unit for performing the data encryption standard  
An execution unit adapted to perform at least a portion of the Data Encryption Standard. The execution unit includes a Left Half input; a Key input; and a Table input. The execution unit also...
7436966 Secure approach to send data from one system to another  
A secure approach for sending a original message from a sender to a receiver. The sender may encrypt the original message by performing an XOR (or XNOR) operation of the original message and a...
RE40530 Public key cryptographic apparatus and method  
A method and apparatus are disclosed for improving public key encryption and decryption schemes that employ a composite number formed from three or more distinct primes. The encryption or...
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...
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...
7388957 Elliptic curve exponentiation apparatus that can counter differential fault attack, and information security apparatus  
Provided is an elliptic curve exponentiation apparatus that can counter the DFA when an elliptic curve exponentiation technique is used. A computation result verification unit 127 receives, as a...
7362863 DES hardware throughput for short operations  
A symmetric key cryptographic method is provided for short operations. The method includes batching a plurality of operation parameters ( 1503 ), and performing an operation according to a...
7362859 Enhancement of utilization of encryption engine  
A method of enhancing throughput of a pipelined encryption/decryption engine for an encryption/decryption process has a predetermined number of stages and provides feedback around the stages (and...
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...
7340606 Digital certificates  
A method for producing a certificate, the certificate including data, the method including choosing a seed s, the seed s including a result of applying a function H to the data, generating a key...
7336783 Cryptographic systems and methods supporting multiple modes  
Cryptographic systems and methods that support multiple modes of operation, such as CBC, CTR and/or CCM modes. In one aspect, a method for encrypting data includes reading a plaintext data block...
7333613 Cyphering of the content of a memory external to a processor  
A method of cyphering, by an integrated processor, of a set of data to be stored in a memory, including performing, in a continuous operation following a data flow, the steps of dividing the data...
7333609 Encrypting apparatus  
A random number sequence is previously generated by the function f 8 for data confidentiality processing, which generates a random number sequence, and stored in a random number sequence memory...
7317794 Enciphering and deciphering apparatus, and enciphering and deciphering method  
The present invention aims at providing a novel enciphering and deciphering apparatus and an enciphering and deciphering method related thereto, which are respectively capable of contracting the...
7305548 Using atomic messaging to increase the security of transferring data across a network  
A client sends a request to an authentication server requesting access to a service at an application server. The authentication server returns a token containing an encrypted version of a session...
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...
Matches 1 - 50 out of 343 1 2 3 4 5 6 7 >