Verifiable Encryption and Applications to Group Signatures and Signature Sharing

Authors

  • Jan Camenisch
  • Ivan B. Damgård

DOI:

https://doi.org/10.7146/brics.v5i32.19438

Abstract

We generalise 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 relying on 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 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.

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Published

1998-06-02

How to Cite

Camenisch, J., & Damgård, I. B. (1998). Verifiable Encryption and Applications to Group Signatures and Signature Sharing. BRICS Report Series, 5(32). https://doi.org/10.7146/brics.v5i32.19438