| 摘要 |
PROBLEM TO BE SOLVED: To provide a secure message authentication technology against side channel attacks. SOLUTION: This message authenticator generating device for calculating a message authenticator (T) to a message (M) from the message (M) performs processing (401) for generating scrambling information (R) from a temporary use numerical value (N), processing (402) for calculating a conversion message (M') from the message (M) and processing (403) for calculating the message authenticator (T) from the scrambling information (R) and the conversion message (M'). In the processing (403) for calculating the message authenticator (R), secure message authentication is achieved against side channel attacks because the scrambling information (R) scrambles or conceals processing information in the processing (403) for calculating the message authenticator (T). COPYRIGHT: (C)2008,JPO&INPIT
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