摘要 |
<P>PROBLEM TO BE SOLVED: To prevent the marker code of an inhibited code from being generated in encryption data, while using an existing encryption system. <P>SOLUTION: It is discriminated, concerning the i-th encryption code obtained by encrypting an i-th code, whether the inhibited code is present in the i-th encryption code or in combinations between the i-th code and (i+1)-th encryption code, between the i-th encryption code and (i+1)-th code, and between (i-1)-th code and the i-th encryption code (S503-S506). In the case such inhibited code is determined absent in respective cases, the i-th encryption code is determined as the encryption result of the i-th code (S507). <P>COPYRIGHT: (C)2005,JPO&NCIPI |