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Multipurpose Identity-Based Signcryption : A Swiss Army Knife for Identity-Based Cryptography
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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. |
BibTeX
@misc{eprint-2003-11877, title={Multipurpose Identity-Based Signcryption : A Swiss Army Knife for Identity-Based Cryptography}, booktitle={IACR Eprint archive}, keywords={public-key cryptography / ID-based cryptography, signcryption, multiple security properties.}, url={http://eprint.iacr.org/2003/163}, note={An extended abstract appears in CRYPTO 2003. eprint@boyen.org 12474 received 8 Aug 2003, last revised 25 Feb 2004}, author={Xavier Boyen}, year=2003 }