| abstract |
An encryption processing device includes: a memory configured to store a first secret key and a first agitation value operated with the first secret key; and a processor coupled to the memory and configured to: receive a first random number, generate a second agitation key based on the first secret key and the first agitation value, generate a first encryption information based on the second secret key and the first random number, update the first agitation value stored in the memory, and output the first agitation value and the first encryption information. |