Results 211 to 220 of about 354,171 (267)

Research on anonymous signatures and group signatures

Computer Communications, 2008
In this paper, we analyze the conventional group signature schemes, and propose the notion of conflict of authenticated contents which implies the unconquerable drawbacks of the current group signature schemes and threshold signature schemes. We discuss an important problem of group signature, that is, whether the group signature is produced on behalf ...
Fucai Zhou, Jun Zhang, Jian Xu 0004
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Convertible group signatures

1996
Group signatures, introduced by Chaum and van Heyst at Eurocrypt'91, allow individual members of a group to sign messages on behalf of the group while remaining anonymous. Furthermore, in case of disputes later a trusted authority, who is given some auxiliary information, can identify the signer.
Seungjoo Kim, Sungjun Park, Dongho Won
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Hierarchical Group Signatures

2005
We introduce the notion of hierarchical group signatures. This is a proper generalization of group signatures, which allows multiple group managers organized in a tree with the signers as leaves. When opening a signature a group manager only learns to which of its subtrees, if any, the signer belongs.
Mårten Trolin, Douglas Wikström
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Short Group Signatures

2004
We construct a short group signature scheme. Signatures in our scheme are approximately the size of a standard RSA signature with the same security. Security of our group signature is based on the Strong Diffie-Hellman assumption and a new assumption in bilinear groups called the Decision Linear assumption.
Dan Boneh, Xavier Boyen, Hovav Shacham
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Improving Revocation for Group Signature with Redactable Signature

2021
Group signature is a major cryptographic tool allowing anonymous access to a service. However, in practice, access to a service is usually granted for some periods of time, which implies that the signing rights must be deactivated the rest of the time. This requirement thus calls for complex forms of revocation, reminiscent of the concept of time-bound
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Study of the amidase signature group

Biochimica et Biophysica Acta (BBA) - Protein Structure and Molecular Enzymology, 1996
Computer methods for database search, multiple alignment and cluster analysis indicated significant homology between amino-acid sequences of 21 amidases or amidohydrolases (EC 3.5). All of them were found to be involved in the reduction of organic nitrogen compounds and ammonia production.
Chebrou, H., Bigey, Frederic, Arnaud, A., Galzy, P.   +3 more
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A Group Signature Scheme Committing the Group

2002
In this paper, a group signature scheme committing the group itself is proposed. In normal group signature schemes, a group member can anonymously sign a message on behalf of a group, and the anonymity of the signature can be revoked by only a designated authority. Consider a situation that multiple groups exist.
Toru Nakanishi 0001, Masayuki Tao, Yuji Sugiyama   +2 more
openaire   +1 more source