Data encryption method

Abstract

Abstract PURPOSE:To enhance the secrecy of ciphering by deciding the order of replacement from both of a key and an input data. CONSTITUTION:The key K is inputted externally and stored in a key register 1. A pseudo random number series generator 2 generates a pseudo random number series one after another according to the content of the key register 1. An address generator 3 inputs a pseudo random number generated by the pseudo randiom number generator 2 and an output data just before and generates an address of a data to be outputted next. The data in an input data buffer 4 designated by the address generated by the address generator 3 is outputted. The outputted data is inputted to a delay device 5 and becomes an input of the address generator of the next cycle. The operation above is repeated by 256 times being number of blocks in the input data buffer 4 to complete the ciphering processing to one input data.

Inventors

• 👤 Akira Maeda
• 👤 章 前田
• 👤 Fuminobu Furumura
• 👤 文伸 古村

Bibliographic Details