Cryptology ePrint Archive: Report 2004/236

Forgery Attacks on Chang et al.'s signature scheme with message recovery

FU Xiaotong, XU Chunxiang and XIAO Guozhen

Abstract: It is found that Chang et al.'s signature scheme with message recovery is not as secure as they claimed, in fact. In this letter, two forgery attacks is proposed to show that the signature can be forged on any uncontrolled messages. To overcome these attacks, the one-way hash functions and the message redundancy schemes may be still used.

Category / Keywords: cryptographic protocols / Digital signature, message recovery, cryptanalysis, forgery attack

Date: received 14 Sep 2004

Contact author: xtfu at mail xidian edu cn

Available format(s): PDF | BibTeX Citation

Version: 20040916:184128 (All versions of this report)

Short URL: ia.cr/2004/236

Discussion forum: Show discussion | Start new discussion