| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a method for generating a cipher-based message authentication code which complicates a DPA attack. <P>SOLUTION: A state array 25 comprising rows 31-34 of bytes S'<SB POS="POST">0</SB>-S'<SB POS="POST">15</SB>and columns 41-44 of bytes S'<SB POS="POST">0</SB>-S'<SB POS="POST">15</SB>based on a message to be transmitted is generated. A message authentication code of the message to be transmitted is generated by retaining the bytes 29, 30 of at least one row 32, 34 of the state array 25. <P>COPYRIGHT: (C)2012,JPO&INPIT |
