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Research and Analysis of Group Signature

Author: WangJiaLi
Tutor: OuHaiWen
School: Xi'an University of Electronic Science and Technology
Course: Cryptography
Keywords: Group signature Identity-based Signature of knowledge Electronic cash
CLC: TN918.1
Type: Master's thesis
Year: 2009
Downloads: 140
Quote: 0
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The group signature special digital signature as a group - oriented cryptography , it can be signed on behalf of groups to allow any group of members of a group , and meet the requirements of anonymity ; When a dispute arises , by group administrators come forward to reveal the signature 's true identity . It is because of the group signature of the some of the main features of the electronic cash and electronic election in the e-commerce and e-government has been widely used . Firstly, the security of the group signature scheme Secretary light East , pointed out that the program does not have the traceability and the ability to resist forgery attacks , open algorithm in fact, can not reveal the true identity of the signer , and gives a forgery attacks ; Secondly, the study group signature scheme proposed by any industry peak , pointed out that the program can not resist a joint attack and dynamically updated less efficient , the most deadly delete members can continue to signature . Again, identity-based dynamic group signature , a dynamic update algorithm is efficient ( only one multiplication ) new program , the program group public key and signature length does not depend on the number of group members , and based on open algorithm can track the implementation of the joint the forgery attack group members . Finally, trying the new identity-based group signature scheme is applied to the electronic cash system , a corresponding offline electronic cash scheme , the programs take full advantage of the nature of the identity-based group signature characteristics and bilinear mapping new forms of electronic cash and to verify the legitimacy of the new method of electronic cash .

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CLC: > Industrial Technology > Radio electronics, telecommunications technology > Communicate > Confidentiality of communications and communications security > Theory
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