DocumentCode
2855233
Title
A Group Key Agreement Scheme Revisited
Author
Cao, Zhengjun ; Liu, Lihua
Author_Institution
Dept. of Math., Shanghai Univ., Shanghai
fYear
2008
fDate
8-10 Sept. 2008
Firstpage
95
Lastpage
98
Abstract
In PKC´2004, a constant-round group key exchange protocol is proposed. It takes advantage of the properties of the ElGamal encryption scheme combined with the standard secret sharing technique. In this paper, we show that the scheme can be greatly simplified because the standard secret sharing technique does not work well. Based on the observation, we present a revisited scheme. It saves about 4/5 cost of the original scheme. In addition, its security can be directly reduced to the underlying Schnorr´s signature scheme and the ElGamal encryption.
Keywords
cryptographic protocols; digital signatures; ElGamal encryption scheme; constant-round group key exchange protocol; group key agreement scheme; signature scheme; standard secret sharing technique; Broadcasting; Computer networks; Computer security; Costs; Cryptography; Information security; Mathematics; Privacy; Protocols; Public key;
fLanguage
English
Publisher
ieee
Conference_Titel
Information Assurance and Security, 2008. ISIAS '08. Fourth International Conference on
Conference_Location
Naples
Print_ISBN
978-0-7695-3324-7
Type
conf
DOI
10.1109/IAS.2008.13
Filename
4627068
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