Verifiable Encrypted Signature And Its Applications

The elliptic curve cryptosystem has the safety performance to be high, the computation load is small, the speed quick, takes the space to be small, the band width request low status a series of merits, oneself is accepted gradually by each greatly international standard organization for the public key password and the digital signature standard. In our country, the electronic signature law also just promulgated, is not mature to the elliptic curve digital signature's research and the application, did not have a unified standard, utilized to the elliptic curve in the special signature is just started. Therefore, deep research elliptic curve digital signature and, in the electronic contract signs the application, has the profound significance.This article essential target is the research face community's digital signature, the bamboo slip is dense and the signing agreement, including the agreement construction, the safety analysis, the secure proof and the application agreement design, the union elliptic curve password technology and in the electronic contract's fair swap agreement established some to suit the special application situation the digital signature, the bamboo slip to be dense and signing plan. The actual content fires at the public key encryption system, the digital signature system, to be possible to confirm the encryption to sign with the signing agreement and the application. Mainly manifests in following several aspects:(1) Introduced several kind of public key encryption system and the digital signature system simply.(2) Introduced emphatically the elliptic curve cipher system, and carries on it with the second chapter of introduction's signature system the comparison, analyzes the elliptic curve cipher system's merit.(3) Through carries on the discussion to the elliptic curve question, and establishes one kind to be advantageous realizes, the safe elliptic curve cipher system, and based on this designed one kind to be possible to confirm the encryption signature plan based on the elliptic curve. Theoretically speaking this plan is safe, and has certain use value, and to its accuracy, the stability and the security has carried on the analysis. (4) Establishes the fourth chapter of institute the encryption signature plan application which may confirm in electronic contract signature, has designed one kind the fair swap agreement which suits the electronic contract to sign, and to this agreement's validity, the security, the time limit and could not denying carry on the proof.Because may confirm the encryption signature plan the security to want high far compared to other signature plan many, thus might confirm the encryption signature plan to introduce the electronic contract in signature, in some both needs to keep secret the correspondence situation which, and needs to authenticate, will have the widespread application prospect.