摘要:
The speed at which an AES decrypt operation may be performed in a general purpose processor is increased by providing a separate decrypt data path. The critical path delay of the aes decrypt path is reduced by combining multiply and inverse operations in the Inverse SubBytes transformation. A further decrease in critical path delay in the aes decrypt data path is provided by merging appropriate constants of the inverse mix-column transform into a map function.
摘要:
The speed at which encrypt and decrypt operations may be performed in a general purpose processor is increased by providing a separate encrypt data path and decrypt data path. With separate data paths, each of the data paths may be individually optimized in order to reduce delays in a critical path. In addition, delays may be hidden in a non-critical last round.
摘要:
The speed at which encrypt and decrypt operations may be performed in a general purpose processor is increased by providing a separate encrypt data path and decrypt data path. With separate data paths, each of the data paths may be individually optimized in order to reduce delays in a critical path. In addition, delays may be hidden in a non-critical last round.
摘要:
A key scheduler performs a key-expansion to generate round keys for AES encryption and decryption just-in-time for each AES round. The key scheduler pre-computes slow operations in a current clock cycle to reduce the critical delay path for computing the round key for a next AES round.
摘要:
The speed at which an AES decrypt operation may be performed in a general purpose processor is increased by providing a separate decrypt data path. The critical path delay of the aes decrypt path is reduced by combining multiply and inverse operations in the Inverse SubBytes transformation. A further decrease in critical path delay in the aes decrypt data path is provided by merging appropriate constants of the inverse mix-column transform into a map function.
摘要:
A key scheduler performs a key-expansion to generate round keys for AES encryption and decryption just-in-time for each AES round. The key scheduler pre-computes slow operations in a current clock cycle to reduce the critical delay path for computing the round key for a next AES round.
摘要:
A processor includes an instruction decoder to receive a first instruction to process a secure hash algorithm 2 (SHA-2) hash algorithm, the first instruction having a first operand associated with a first storage location to store a SHA-2 state and a second operand associated with a second storage location to store a plurality of messages and round constants. The processor further includes an execution unit coupled to the instruction decoder to perform one or more iterations of the SHA-2 hash algorithm on the SHA-2 state specified by the first operand and the plurality of messages and round constants specified by the second operand, in response to the first instruction.
摘要:
A method is described. The method includes iteratively performing for each position in a result matrix stored in a third register, multiplying a value at a matrix position stored in a first register with a value at a matrix position stored in a second register to obtain a first multiplicative value, where the positions in the first register and the second register are determined by the position in the result matrix and performing an exclusive or (XOR) operation with the first multiplicative value and a value stored at a result matrix position stored in the third register to obtain a result value.
摘要:
A processor includes a plurality of registers, an instruction decoder to receive an instruction to process a KECCAK state cube of data representing a KECCAK state of a KECCAK hash algorithm, to partition the KECCAK state cube into a plurality of subcubes, and to store the subcubes in the plurality of registers, respectively, and an execution unit coupled to the instruction decoder to perform the KECCAK hash algorithm on the plurality of subcubes respectively stored in the plurality of registers in a vector manner.
摘要:
Vector instructions for performing SNOW 3G wireless security operations are received and executed by the execution circuitry of a processor. The execution circuitry receives a first operand of the first instruction specifying a first vector register that stores a current state of a finite state machine (FSM). The execution circuitry also receives a second operand of the first instruction specifying a second vector register that stores data elements of a liner feedback shift register (LFSR) that are needed for updating the FSM. The execution circuitry executes the first instruction to produce a updated state of the FSM and an output of the FSM in a destination operand of the first instruction.