Study on Proxy Signature Schemes with Bionic Optimization

Bionic evolution is an adaptive artificial intelligence technique; it mimics natural evolution process to solve optimization problems. In the paper, we present an improved proxy signature scheme based on bionic evolution. In the scheme, the original private key is generated with bionic evolution algorithm by a successive optimizing process. The optimizing selection algorithm renders effective protection for the private key and the signature system, avoids the insecure randomness in secret parameter selection, and thus prevents generalized signature forgery and coalition attack of original signer and proxy signers. The algorithms of the scheme take great advantage of the superiority of ECC (Elliptic Curves Cryptosystem), such as high efficiency, short key length and etc. The scheme can achieve the same security with less storing space, smaller communication band-width and less overheads of the system and thus proves to be applicable to such circumstances as with restricted computation ability and integrated space, circumstances with limited bandwidth yet requiring for high-speed operation.