Paper 2003/163
Multipurpose Identity-Based Signcryption : A Swiss Army Knife for Identity-Based Cryptography
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.
Note: Minor corrections.
Metadata
- Available format(s)
-
PDF
PS
- Category
- Public-key cryptography
- Publication info
- Published elsewhere. An extended abstract appears in CRYPTO 2003.
- Keywords
- ID-based cryptographysigncryptionmultiple security properties.
- Contact author(s)
- eprint @ boyen org
- History
- 2004-02-26: last of 2 revisions
- 2003-08-11: received
- See all versions
- Short URL
- https://ia.cr/2003/163
- License
-
CC BY
BibTeX
@misc{cryptoeprint:2003/163,
author = {Xavier Boyen},
title = {Multipurpose Identity-Based Signcryption : A Swiss Army Knife for Identity-Based Cryptography},
howpublished = {Cryptology {ePrint} Archive, Paper 2003/163},
year = {2003},
url = {https://eprint.iacr.org/2003/163}
}
