Welcome to the resource topic for 1999/008
Verifiable Encryption and Applications to Group Signatures and Signature Sharing
Authors: Jan Camenisch, Ivan DamgaardAbstract:
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.
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