ENCRYPTION KEY GENERATOR, ENCRYPTION KEY GENERATING METHOD, AND STORAGE MEDIUM FOR STORING ENCRYPTION KEY GENERATING PROGRAM

摘要

PROBLEM TO BE SOLVED: To provide an encryption system such that risk of leakage of an encryption key can be precluded.;SOLUTION: An encryption means 1 uses encryption key data for an encryption key to encrypt object data. A 1st tentative encryption key generating means 2 generates 1st tentative encryption key data corresponding definitely to received data based on the received data. A 1st encryption control means 3 allows the encryption means 1 to encrypt the received data by using the 1st tentative encryption key data generated by the 1st tentative encryption key generating means 2. A 1st encryption key generating mans 4 uses the data definitely corresponding to the received data based on the data through the encryption by the encryption means 1 commanded by the 1st encryption control means 3. Since the encryption key data uniquely corresponding to the received data can be generated at any time it is not required to store the encryption key data to a storage device or the like and leakage of the encryption key be prevented.;COPYRIGHT: (C)2002,JPO