Verifiable Encryption and Applications to Group Signatures and Signature Sharing

Jan Camenisch; Ivan Damgaard

Paper 1999/008

Verifiable Encryption and Applications to Group Signatures and Signature Sharing

Jan Camenisch and Ivan Damgaard

Abstract

We generalize and improve the security and efficiency of the verifiable encryption scheme of Asokan et al., such that it can rely on more general assumptions, and can be proven secure without assuming random oracles. We show a new application of verifiable encryption to group signatures with separability, these schemes do not need special purpose keys but can work with a wide range of signature, identification, and encryption schemes already in use. Finally, we extend our basic primitive to verifiable threshold and group encryption. By encrypting digital signatures this way, one gets new solutions to the verifiable signature sharing problem.

Metadata

Available format(s): PS
Publication info: Published elsewhere. Appeared in the THEORY OF CRYPTOGRAPHY LIBRARY and has been included in the ePrint Archive.
Keywords: public-key encryption zero-knowledge protocols verifiable signature sharing group signatures
Contact author(s): camenisch @ brics dk
History: 1999-03-23: received
Short URL: https://ia.cr/1999/008
License: CC BY

BibTeX

@misc{cryptoeprint:1999/008,
      author = {Jan Camenisch and Ivan Damgaard},
      title = {Verifiable Encryption and Applications to Group Signatures and Signature Sharing},
      howpublished = {Cryptology ePrint Archive, Paper 1999/008},
      year = {1999},
      note = {\url{https://eprint.iacr.org/1999/008}},
      url = {https://eprint.iacr.org/1999/008}
}