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Self Proxy Signature Scheme


Young-Seol Kim, Jik Hyun Chang


Vol. 7  No. 2  pp. 335-338


The proxy signature scheme is a kind of digital signature scheme. In the proxy signature scheme, one user, called the original signer, can delegate his/her signing capability to another user called the proxy signer. This is similar to a person delegating his/her seal to another person in the real world. In this paper, we propose a new type of proxy signature scheme, the self proxy signature scheme. In this scheme, a signer, Alice, delegates her signing capability to herself and uses the proxy private/public key pair as temporary keys. Using this scheme, the signer protects her original private/public key pair and uses multiple private/public key pairs simultaneously. Therefore, the signer Alice uses a temporary key pair for only a particular work. Furthermore, it is easy to revoke the temporary private/public key pair. Thus, it can be said that the proposed scheme is practical.


Digital signature, Proxy signature, Public key cryptography