A Secure LITESET Scheme

Jau-Ji SHEN  Iuon-Chang LIN  Min-Shiang HWANG  

IEICE TRANSACTIONS on Information and Systems   Vol.E87-D   No.11   pp.2509-2512
Publication Date: 2004/11/01
Online ISSN: 
Print ISSN: 0916-8532
Type of Manuscript: LETTER
Category: Application Information Security
cryptography,  LITESET,  SET,  signcryption,  

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Recently, a new light-weight version of the secure electronic transaction protocol was proposed. The protocol can achieve two goals. One goal is that the security level is the same as the SET protocol. The other goal is to reduce the computational time in message generation and verification, and reduce the communication overhead. However, the protocol has a weakness, which is that non-repudiation is acquired, but confidentiality is lost. In this paper, we point out the weakness of the protocol. We also propose an improvement to the protocol to overcome this weakness.