Title :
An Improvement of an Identity-Based Key Issuing Protocol
Author :
Cao, Feng ; Cao, Zhenfu ; Wang, Licheng
Author_Institution :
Dept. of Comput. Sci. & Eng., Shanghai Jiao Tong Univ.
Abstract :
At TCP ADS 2005, Sui et al. proposed a novel separable and anonymous ID-based key issuing scheme without secure channel, and claimed the key-escrow problem has been solved. In this paper, we present a security analysis on their schemes and point out that their two protocols are not secure and they do not solve the key-escrow problem. Further, we present an improved key issuing protocol which is proved to be secure against adaptive chosen message attack without the random oracle model under the q - SDH assumption
Keywords :
digital signatures; message switching; protocols; public key cryptography; telecommunication channels; telecommunication security; anonymous ID-based key issuing scheme; identity-based key issuing protocol; key-escrow problem; message attack; random oracle model; secure channel; Computer science; Cryptographic protocols; Identity-based encryption; Mathematics; Privacy; Public key; Public key cryptography; Security; Synchronous digital hierarchy;
Conference_Titel :
Computer and Computational Sciences, 2006. IMSCCS '06. First International Multi-Symposiums on
Conference_Location :
Hanzhou, Zhejiang
Print_ISBN :
0-7695-2581-4
DOI :
10.1109/IMSCCS.2006.185
