| 摘要 |
PROBLEM TO BE SOLVED: To provide an encryption key generation device capable of efficiently generating a plurality of encryption keys.SOLUTION: An encryption key generation device includes a first calculation unit, a second calculation unit, and a third calculation unit. The first calculation unit performs processing of a first round with respect to a first part of first data. The second calculation unit performs processing of the first round with respect to second parts of plurality of pieces of second data. The plurality of pieces of second data include the first part of the first data after processing of the first round of cryptographic operation and an at least partially changed second part other than the first part of the first data; the second part is partially different from other second parts; and the second calculation unit performs processing of the first round of cryptographic operation with respect to each of second parts. The third calculation unit performs processing of second and following rounds with respect to the plurality of pieces of second data. |
