| 摘要 |
A key creating device creates a first public key and a first secret key of the electronic signature method satisfying the noncounterfeitability and a second public key and the first secret key of the chameleon commitment method. The signature device generates a commitment, a first random number according to the Com algorithm, and a first signature by using the first secret key. The signature device further generates a second random number according to the Cam algorithm by using the message written by adding a first signature to an object message, and creates an electronic signature by combining the first signature and the second random number. A verifying device receives the signed message written by adding the first signature included in the electronic signature to the object message, creates a commitment according to the ComVer algorithm, and performs verification by using the commitment and the first signature.
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