Proxy re-encryption: Difference between revisions

Revision as of 21:48, 5 May 2009

Revision as of 14:38, 31 August 2009

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{{Orphan|date=February 2009}}

{{Expert|date=February 2009}}

'''Proxy re-encryption''' schemes are [[cryptosystems]] which allow third-parties ([[proxy server|proxies]]) to alter a [[ciphertext]] which has been [[encryption|encrypted]] for one party, so that it may be decrypted by another.

==Examples of Use==

{{Expert-subject|Cryptography|section|date=June 2007}}

Bob could designate a proxy to re-encrypt one of his messages that is to be sent to Chris. This generates a new [[Key (cryptography)|key]] that Chris can use to decrypt the message. Now if Alice sends Chris a message that was encrypted under Bob's key, the proxy will alter the message, allowing Chris to decrypt it. This method allows for a number of applications such as [[e-mail forwarding]], law-enforcement monitoring, and content distribution.

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==References==

{{reflist}}

* M. Blaze, G. Bleumer, M. Strauss. [http://link.springer.de/link/service/series/0558/bibs/1403/14030127.htm Divertible Protocols and Atomic Proxy Cryptography].

*Bertino, E., Sandhu, R. [http://ieeexplore.ieee.org/search/wrapper.jsp?arnumber=1416861 "Database security - concepts, approaches, and challenges."] <u>IEEE Transations on Dependable and Secure Computing</u> 2 (2005): 2-19

*G. Ateniese, K. Fu, M. Green, S. Hohenberger. [http://spar.isi.jhu.edu/~mgreen/proxy.pdf Improved Proxy Re-encryption Schemes with Applications to Secure Distributed Storage]. Proceedings of the 12th Annual Network and Distributed Systems Security Symposium (NDSS 2005), San Diego, California, 2005.

*M. Green, G. Ateniese. [http://eprint.iacr.org/2006/473 Identity-Based Proxy Re-encryption]. Applied Cryptography and Network Security Conference, June 2007.

*S. Hohenberger, G. Rothblum, a. shelat, and V. Vaikuntanathan. Securely Obfuscating Re-encryption. Proceedings of the Theory of Cryptography Conference (TCC), 2007.

*[http://spar.isi.jhu.edu/~mgreen/prl/ The JHU-MIT Proxy Re-cryptography Library]

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[[Category:Cryptography]]

{{crypto-stub}}