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Pairing-Based Onion Routing with Improved Forward Secrecy
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Abstract: | This paper presents new protocols for onion routing anonymity networks. We define a provably secure privacy-preserving key agreement scheme in an identity-based infrastructure setting, and use it to forge new onion routing circuit constructions. These constructions, based on a user's selection, offer immediate or eventual forward secrecy at each node in a circuit and require significantly less computation and communication than the telescoping mechanism used by Tor. Further, the use of the identity-based infrastructure also leads to a reduction in the required amount of authenticated directory information. Therefore, our constructions provide practical ways to allow onion routing anonymity networks to scale gracefully. |
BibTeX
@misc{eprint-2008-17757, title={Pairing-Based Onion Routing with Improved Forward Secrecy}, booktitle={IACR Eprint archive}, keywords={cryptographic protocols / Onion routing, Tor, pairing-based cryptography, anonymous key agreement, forward secrecy}, url={http://eprint.iacr.org/2008/080}, note={Extended version of a paper published in PETS 2007 iang@cs.uwaterloo.ca 13929 received 20 Feb 2008}, author={Aniket Kate and Greg Zaverucha and Ian Goldberg}, year=2008 }