Results 41 to 50 of about 50 (50)
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2006
The main advantage of ring signatures is to ensure anonymity in ad hoc groups. However, since a group manager is not present in ad hoc groups, there is no existing way to identify the signer who is responsible for or benefit from a disputed ring signature. In this paper, we address this issue by formalizing the notion of ad hoc group signature.
Qianhong Wu +3 more
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The main advantage of ring signatures is to ensure anonymity in ad hoc groups. However, since a group manager is not present in ad hoc groups, there is no existing way to identify the signer who is responsible for or benefit from a disputed ring signature. In this paper, we address this issue by formalizing the notion of ad hoc group signature.
Qianhong Wu +3 more
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Group actions and higher signatures, II
Communications on Pure and Applied Mathematics, 1987[For Part I see Proc. Natl. Acad. Sci. USA 82, 1297-1298 (1985; Zbl 0569.57027).] In this paper we shall consider nonsimply connected generalizations of two well-known results for group actions on simply connected manifolds. The first of these results is that the signature of a manifold with an \(S^ 1\) action is the same as the signature of its fixed ...
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Hierarchical Identities from Group Signatures and Pseudonymous Signatures
2016The use of group signatures has been widely suggested for authentication with minimum disclosure of information. In this paper, we consider an identity management system, where users can access several group signatures, managed by different authorities.
Julien Bringer +3 more
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Journal of Mathematical Sciences, 2005
Let \(M\) be an ideal hyperbolic polygon with \(2n-2\) vertices \[ \alpha_1, \alpha_2, \alpha_{n-1},\dots, \alpha_n(=\beta_n), \beta_{n-1},\dots,\beta_2, \beta_1(=\alpha_1). \] Denote by \(\Gamma\) the group generated by \(n-1\) side pairings \(S_i:\beta_i\beta_{i+1}\to \alpha_i\alpha_{i+1}\) for \(1\leq i\leq n-1\). Each pairing \(S_i\) depends on one
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Let \(M\) be an ideal hyperbolic polygon with \(2n-2\) vertices \[ \alpha_1, \alpha_2, \alpha_{n-1},\dots, \alpha_n(=\beta_n), \beta_{n-1},\dots,\beta_2, \beta_1(=\alpha_1). \] Denote by \(\Gamma\) the group generated by \(n-1\) side pairings \(S_i:\beta_i\beta_{i+1}\to \alpha_i\alpha_{i+1}\) for \(1\leq i\leq n-1\). Each pairing \(S_i\) depends on one
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Improving Revocation for Group Signature with Redactable Signature
2021Group 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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WIT Transactions on Information and Communication Technologies, 2015
B. H. Li, H. P. Zhao, Y. L. Zhao
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B. H. Li, H. P. Zhao, Y. L. Zhao
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