Patent ID: 8370633
Filing Date: 2013-02-05
Classification: H04L

Abstract:
1. An information processing apparatus comprising: a signature generating section that generates an electronic signature σ by using a signature key KS associated with a verification key KV; and a substitute-key generating section that generates, with respect to an electronic document m to which the electronic signature σ is attached by the signature generation section, a substitute verification key KV', where KV′≠KV, that is capable of verifying a validity of the electronic signature σ and a substitute signature key KS′, where KS′≠KS, associated with the substitute verification key KV′; wherein, in a predetermined case, the verification key KV and the signature key KS are updated to the substitute verification key KV′ and the substitute signature key KS′ wherein when the signature generating section generates N electronic signatures σ wherein the information processing apparatus includes a processor and memory.