DATA CONVERTER, DATA CONVERSION METHOD, DATA CONVERSION PROGRAM, AND COMPUTER READABLE RECORDING MEDIUM RECORDED WITH DATA CONVERSION PROGRAM

摘要

PROBLEM TO BE SOLVED: To downsize a data converter. SOLUTION: A sub-conversion section 330 existing in the data converter for performing encryption/decryption of data has a data transfer function or key transfer function together with a data conversion function and performs the transfer of the data subjected to nonlinear conversion in a main conversion section 320 together with the conversion of the data or the transfer of the key outputted from a key KL register 240 by changing over the data conversion function and the data or key transfer function. COPYRIGHT: (C)2004,JPO