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Inspired by Agrawal, Boneh and Boyen's identity-based encryption scheme, we proposed a post-quantum identity-based signature scheme from lattices. In this construction, two distinct trapdoors are used to find short bases. One trapdoor enables the real implementation to generate short bases for all lattices. The other trapdoor enables the simulator to generate short bases for all lattices. Moreover,...
Multi-proxy signature schemes are very useful tools when an original signer needs to delegate his signing capability to a group of proxy signers, and have been suggested in numerous applications. The proxy revocation problem is an essential issue of the proxy signature schemes, however, it is seldom considered in the multi-proxy signature schemes. In this paper, we give a formal definition and security...
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