Showing papers on "Triple DES published in 1991"

Method and apparatus for encryption/authentication of data in energy metering applications

Abstract: In one embodiment, the present invention is an encryption/decryption and authentication algorithm. The algorithm has three major steps. The first step is generating cipher text. The second step is generating the authentication field. The third step is encrypting or deciphering the appropriate data in the message. One byte of cipher text is generated for every byte of plain text contained in the message. After all the cipher text is generated, a four byte authentication field is generated using the last four bytes of cipher text. The message is then scanned for data fields which have been encrypted or are to be encrypted and the corresponding byte of cipher text replaces the message bytes. The encryption is accomplished by sending the cipher text instead of message text. To decipher the message, the algorithm operates in a reverse mode to replace the cipher text with the message text, i.e., the algorithm is a self-reversing process.

VLSI implementation of a new block cipher

Abstract: The high speed architecture for a VLSI implementation of a new smart-key block cipher is presented. The chip performs data encryption and decryption in a single hardware unit. It runs with a maximum clock frequency of 33 MHz permitting a data conversion rate of more than 55 Mb/s. This high data rate, compared to currently available DES (data encryption standard) implementations, has been achieved by implementing a pipelined architecture and by using a sophisticated data scheduling scheme guaranteeing a continuously fully loaded pipeline. >

Key data sharing device

Abstract: PURPOSE:To eliminate a need of decoding processing to share a session key between communicators while confirming it by communicators of each other. CONSTITUTION:An information processing terminal 100 and an IC card 110 transmit generated random numbers 10 and 20 to each other and cipher the transmitted random numbers to obtain cipher data 12 and 22. Thereafter, they cipher received random numbers of each other to transmit cipher data 24 and 14. They compare received cipher data and data ciphered by themselves with each other; and in the case of coincidence, they use secret key data and operated cipher data to obtain key data common to them by operation.