The Research And Design Of Secure Digital Time-stamping Based On ECC Blind Signature

Time-stamping can provide a non-change,non-forgery,identifier of time marker for user data,and prevent from user subsequently denying acts,especially can provide accurate time for electronic document or electronic transactions.There is an important role in the E-Commerce and intellectual property rights protection.At present,there are absolute authentications and relative authentications.Relative authentications include simple time-stamping mechanism,online link mechanism,and tree,binary,decimal mechanisms,and so on.But these schemes can not solve the problem of forgery of the forward time,that is,the now time-stamping stamps on the backward document,or the future time-stamping stamps on the now document.Absolute time-stamping mechanism reflect the actual date and time information,absolute authentications schem can effectively solve forgery of forward time,but can not prevent the signaturers and TSA collusive from frauding.They may use a past time to forge the time-stamping of signature,this is forgery of the backward time-stamping.Based on absolute and relative timestamp mechanism, digital time-stamping mechanism is proposed, using the ECC blind signature. Its performance is analyzed on security and complexity. Main research is shown as follows:The function and current research of the time-stamping mechanism is analyzed. The shortage of current time-stamping mechanism is pointed out;An algorithm on ECC blind signature time-stamping is proposed.The algorithm, which is applied in the field of secure digital time-stamping service,solves time-stamping forge problem.Structure model of the digital time-stamping mechanism is given on the basis of ECC blind signature.Its performance is analyzed on security and complexity;Using TCP stream socket technique in the developing platform of VC6.0,key functions in the digital time-stamping model on the basis of ECC blind signature are implemented.