Cryptographic decryption system, cryptographic decryption method, and cryptographic decryption program

摘要

PROBLEM TO BE SOLVED: To eliminate the need for key management and to reduce a calculation load and a calculation cost. A decryption device having a cipher generator 100 having a cipher generation unit 101 that generates a cipher by an operation, and a decryption unit 201 that receives a cipher text from the cipher generator 100 and decrypts the cipher text into a plain text. In a cryptographic decryption system including 200, the cryptographic generator 100 and the decryption device 200 are common to the cryptographic side to generate the same common key by exchanging notification information generated by each of the one-dimensional mapping operations. A key generation unit 102 and a decryption side common key generation unit 202 are provided, the encryption generation unit 101 performs encryption generation based on the common key, and the decryption unit performs decryption processing based on the common key. [Selection diagram] Fig. 2