Agent Based On Ecc Digital Signature Technology Research And Design

Proxy signature systems have great applications in e-business whose securety is based on the difficulty of integer factoring or the difficulty of solving thecommon discrete logarithm problem. As the development of integer factoring andthe parallel computing technology, the public key cryptographies used today haveto enlarge key-size which slows their speed and increases their complexity. Also,there are many attacking methods to solve the gene of a big integer and the con-non discrete logarithm problem.This thesis introduces the concept and the property of a Proxy signature systen, we analyse two comparatively representative systems and find that thereexist some disadvantages in the length of their keys, the speed of their disposaland their security.This thesis also compares RSA, DSA and the cryptosystem based on discrete logarithm problem with ECC (Elliptic Curve Cryptosystem), from the comparison we can draw a conclusion that ECC has a particular advantage in the security, the length of key, the speed of disposal, the system parameter and the demand of bandwidth. The thesis makes use of those advantages and constructs the Proxy signature system based on ECC.We also analyse and demonstrate the system whose security is based on ECDLP (elliptic curve discrete logarithm problem). Comparing with the two former systems, our system has the merits of improvedsecurity, much less key-length, faster speed of disposal, much less system param-eter and much less demand of bandwidth.