The electronic signature which uses public key encryption technology vis-a-vis the signature target data which is the storage null clear text or the flat amount digest which store the common access manner for the signature

摘要

PROBLEM TO BE SOLVED: To discriminatingly use signature engines and multiple signature algorithm with ease and to easily add a new signature engine or new signature algorithm to an existent system in such a case without affecting a higher-order application. ;SOLUTION: A secret key management table which manages pieces of secret key information is generated (S1). Signature engine dependency information depending upon a signature engine is registered and managed (S2). A request to access a signature engine is accepted (S3). A specified key name is obtained (S4). Information needed for signature generation or key couple generation corresponding to the key name is obtained from the secret key management table (S5). An arbitrary signature engine is requested to generate a key couple or signature (S6).;COPYRIGHT: (C)2001,JPO