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Paper 2005/427

Solutions to Key Exposure Problem in Ring Signature

Joseph K. Liu and Duncan S. Wong

Abstract

In this paper, we suggest solutions to the key exposure problem in ring signature. In particular, we propose the first forward secure ring signature scheme and the first key-insulated ring signature schemes. Both constructions allow a $(t,n)$-threshold setting. That is, even $t$ secret keys are compromised, the validity of all forward secure ring signatures generated in the past is still preserved. In the other way, the compromise of up to all secret keys does not allow any adversary to generate a valid key-insulated ring signature for the remaining time periods.

Metadata
Available format(s)
PDF
Category
Public-key cryptography
Publication info
Published elsewhere. Unknown where it was published
Keywords
Signatures
Contact author(s)
liu @ cs bris ac uk
History
2005-11-23: received
Short URL
https://ia.cr/2005/427
License
Creative Commons Attribution
CC BY
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