Research On The Multi-signature In Collaborative Design

With the rapid development and popular application of the Internet, the technology of information security becomes more and more important. The digital signature technique is the foundation and guarantee of the information security. Collaborative design supports the product development teams and members from different geographical places under the network environment to perform real-time interaction and information sharing about the product development in order to complete the task of product development. In the collaborative design system, there are often a large number of technical files which need various audits and approval from different departments. Under the collaborative environment, the work results need to be approved by all the participants, so the structure of the signature is very complicated. The structured multi-signature has a more general order. Its signature structure is agreed before signing, so it is very suitable to be applied under the collaborative environment.In the field of the public-key cryptography, the topic of using the ECC system which has the relatively high safety in the field of digital signatures has been concerned by more and more researchers. I choose the elliptic curve cryptography as the public key cryptography of the structured multi-signature and apply it to the collaborative environment in the field of manufacture to thereby strengthen thesecurity and integrity of the design results in the collaborative system.In this paper, the main work and the result of the research include:After the research about the elliptic curve cryptography in recent years and the analysis of the latest findings of the multi-signature and structured multi-signatures, a scheme of structured multi-signatures algorithm designed for the collaborative platform is presented according to its specific security needs. Also analyze the security and efficiency of the structured multi-signature algorithm. According to the algorithm, realize the structured multi-signature system under the collaborative environment and test the function and the performance of the system.The characteristics and innovation of the paper reflects in the following three aspects:First, using elliptic curve public key cryptography to carry out the structured multi-signature.Second, the structured multi-signatures is used to strengthen the co-design platform for data integrity.Third, design a scheme of structured multi-signatures algorithm and carry it out under the platform of JAVA.