Attribute-based group key establishment

Rainer Steinwandt; Adriana Suárez Corona

Paper 2010/235

Attribute-based group key establishment

Rainer Steinwandt and Adriana Suárez Corona

Abstract

Motivated by the problem of establishing a session key among parties based on the possession of certain credentials only, we discuss a notion of attribute-based key establishment. A number of new issues arise in this setting that are not present in the usual settings of group key establishment where unique user identities are assumed to be publicly available. After detailing the security model, we give a two-round solution in the random oracle model. As main technical tool we introduce a notion of attribute-based signcryption, which may be of independent interest. We show that the type of signcryption needed can be realized through the encrypt-then-sign paradigm. Further, we discuss additional guarantees of the proposed protocol, that can be interpreted in terms of deniability and privacy.

Metadata

Available format(s): PDF
Category: Cryptographic protocols
Publication info: Published elsewhere. to appear in Advances in Mathematics of Communications (AMC)
Keywords: group key establishment attribute-based cryptography signcryption
Contact author(s): adriana @ orion ciencias uniovi es
History: 2010-04-28: received
Short URL: https://ia.cr/2010/235
License: CC BY

BibTeX

@misc{cryptoeprint:2010/235,
      author = {Rainer Steinwandt and Adriana Suárez Corona},
      title = {Attribute-based group key establishment},
      howpublished = {Cryptology {ePrint} Archive, Paper 2010/235},
      year = {2010},
      url = {https://eprint.iacr.org/2010/235}
}