Theoretical Research And Applications Of Group Blind Signature

Simply speaking, digital signature is the data attached to the data unit, which is the cryptogram transform of data unit and allows the receiver to affirm that the data comes from a right place and is integrated and can be used to prevent data from fabricating, or be used for some special purpose. Digital signature is the research focus of current network security field, especially in electronic business, electronic bank, and electronic government etc. Moreover, digital signature has a bright future in every field of the social life. With the development of network and the broad use of the information systems, digital signature is broadly used as an electronic simulation of handwriting signature. With the deep research, some special digital signatures for the specific environments are proposed , which are proxy signature, group signature, blind signature, threshold signature and ring signature and so on.Group blind signature is considered to derive from group signature, and has some traits of blind signature. How to build an efficient group blind signature solution is very difficult. In 1998, Lysyanskaya and Ramzan proposed the first group blind signature solution on the finance cryptogram meeting. It was based on CS97 and used the inefficient dual discrete logarithm knowledge-signature, so it wasn't very efficient. Moreover the CS97 solution couldn't be ganged up against and three group members could create a new valid group member certificate. This solution couldn't undo the group members just like all the past group signatures. This paper analyzes all the group signatures, makes a compare and first builds a group blind signature solution in which members can be undone. This solution is based on the efficient group signature architecture.Comparing with the single bank release of the past electronic cash, the multi-banks electronic cash system as the scenario of group blind signature is close to practical applications. Lysyanskaya and Ramzan first implemented an online multi-banks electronic cash system by using their own group blind signature solution. The focus of this solution was the distributed releasing of the electronic cash, and the electronic cash is completely anonymous. This looked practical, but being completely anonymous...