The Research Of Identity_based Designated Verifier Signature

Today, the rapid developming of information technology, making information storage and distribution have become more convenient and fast. E-shopping platform, such as Dangdang, Amazon e-commerce applications is nowadays a hot way to shop. But when important personal information on computer networks in full view of circulation, in order to disclose the information Buzhi Yu easy, and let the person in possession of information from major losses suffered irreparable need to use some method. Digital signature technology, integrity, authenticity, etc. to meet the requirements of e-commerce, therefore, in the modern information technology plays an important role. Therefore, in the modern information technology plays an important role.In comparison with ordinary digital signature, the signer's public key with anyone to verify the validity of the signature, the signer of this nature if you want to protect his privacy case, the person whose signature it will be reluctant things. Designated Verifier Signature(DVS) proposal of the concept, a good solution to this particular request. In some special cases, if the signature is not signed by the holder himself, then, to get his signature holder expected to specify a verifier to verify that the signature need to use another technology.The proposed of Universal Designated Verifier signature is a good solution to deal with the problem.This paper's main content and structure of the article is as follows:The previous section, the agency had applied to prior knowledge, as well as the definition of DVS and related concepts, drawing on the previous proposal, based on the knowledge of mankind the advantages, which proposed a new ID-DVS scheme, and thus give the corresponding solution algorithms. Relative to the proposed new program, make the necessary security analysis as well as to the certification process to arrive at the proposed scheme can not only meet the DVS by nature, but also improved over the original program. The latter part, according to DVS signer can not let the holders of not only verify the signer to specify the limitations of those deriving universal DVS scheme, and for the existing universal DVS scheme's credibility Center is only one case, made in two trusted computing to the existing programs further enhance the security to make improvements to better meet the existing adaptation of the actual situation.