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- W3029836099 startingPage "76" @default.
- W3029836099 abstract "Structure-preserving signatures are schemes in which public keys, messages, and signatures are all collections of source group elements of some bilinear groups. In this paper, we introduce fully structure-preserving signature schemes, with the additional requirement that even secret keys should be group elements. This new type of structure-preserving signatures allows for efficient non-interactive proofs of knowledge of the secret key and is useful in designing cryptographic protocols with strong security guarantees based on the simulation paradigm where the simulator has to extract the secret keys on-line. To gain efficiency, we construct shrinking structure-preserving trapdoor commitments. This is by itself an important primitive and of independent interest as it appears to contradict a known impossibility result. We argue that a relaxed binding property lets us circumvent the impossibility result while still retaining the usefulness of the primitive in important applications as mentioned above." @default.
- W3029836099 created "2020-06-05" @default.
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- W3029836099 date "2015-01-01" @default.
- W3029836099 modified "2023-09-23" @default.
- W3029836099 title "Fully Structure-Preserving Signatures and Shrinking Commitments." @default.
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