Paper Info
Title
Fair Threshold Decryption with Semi-Trusted Third Parties
Abstract
A threshold decryption scheme is a multi-party public key cryptosystem that allows any sufficiently large subset of participants to decrypt a ciphertext, but disallows the decryption otherwise. Many threshold cryptographic schemes have been proposed so far, but fairness is not generally considered in this earlier work. In this paper, we present fair threshold decryption schemes, where either all of the participants can decrypt or none of them can. Our solutions employ semi-trusted third parties (STTP) and off-line semi-trusted third parties (OTTP) previously used for fair exchange. We consider a number of variants of our schemes to address realistic alternative trust scenarios. Although we describe our schemes using a simple hashed version of ElGamal encryption, our methods generalize to other threshold decryption schemes and threshold signature schemes as well.
Year
DOI
Venue
2009
10.1504/IJACT.2010.038307
International Journal of Applied Cryptography
Keywords
DocType
Volume
fair threshold decryption,elgamal encryption,realistic alternative trust scenario,fair threshold decryption scheme,fair exchange,threshold signature scheme,earlier work,multi-party public key cryptosystem,semi-trusted third parties,large subset,threshold decryption scheme,threshold cryptographic scheme,trusted third party
Conference
2
Issue
ISSN
Citations 
2
0302-9743
0
PageRank 
References 
Authors
0.34
30
5
Name
Order
Citations
PageRank
Jeongdae Hong1151.63
Jinil Kim2131.69
Jihye Kim3141.35
Matthew K. Franklin4959119.11
Kunsoo Park51396171.00