Welcome to the resource topic for 2003/163
Title:
Multipurpose Identity-Based Signcryption : A Swiss Army Knife for Identity-Based Cryptography
Authors: Xavier Boyen
Abstract:A combined Identity-Based Signature/Encryption system with multiple security properties is presented. The scheme allows Alice to sign a message and encrypt it for Bob (“confidentiality”) in such a way that the ciphertext does not reveal anything about their identities (“anonymity”); upon receipt, Bob is convinced that he is Alice’s intended addressee (“authentication”) but is unable to prove this to a third party (“unlinkability”); nevertheless, the decrypted message bears a signature by Alice that anyone can verify (“non-repudiation”). The construction is based on the Bilinear Diffie-Hellman assumption, and proved secure in the random oracle model.
ePrint: https://eprint.iacr.org/2003/163
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