Accountable Tracing Signatures

Paper 2014/824

Accountable Tracing Signatures

Markulf Kohlweiss and Ian Miers

Abstract

Demands for lawful access to encrypted data are a long standing obstacle to integrating cryptographic protections into communication systems. A common approach is to allow a trusted third party (TTP) to gain access to private data. However, there is no way to verify that this trust is well place as the TTP may open all messages indiscriminately. Moreover, existing approaches do not scale well when, in addition to the content of the conversation, one wishes to hide ones identity. Given the importance of metadata this is a major problem. We propose a new signature scheme as an accountable replacement for group signatures, accountable forward and backward tracing signatures.

Metadata

Available format(s): PDF
Category: Public-key cryptography
Publication info: Preprint. MINOR revision.
Keywords: group signature
Contact author(s): imiers @ cs jhu edu
History: 2014-10-12: received
Short URL: https://ia.cr/2014/824
License: CC BY

BibTeX

@misc{cryptoeprint:2014/824,
      author = {Markulf Kohlweiss and Ian Miers},
      title = {Accountable Tracing Signatures},
      howpublished = {Cryptology {ePrint} Archive, Paper 2014/824},
      year = {2014},
      url = {https://eprint.iacr.org/2014/824}
}