%0 Journal Article
%T Forgeability of Wang-Tang-Li’s ID-Based Restrictive Partially Blind Signature Scheme<br>Forgeability of Wang-Tang-Li s ID-Based Restrictive Partially Blind Signature Scheme
%A Sheng-Li Liu
%A Xiao-Feng Chen
%A Fang-Guo Zhang
%A <br>Sheng-Li Liu
%A Xiao-Feng Chen
%A and Fang-Guo Zhang
%J 计算机科学技术学报
%D 2008
%I 
%X Restrictive partially blind signature (RPBS) plays an important role in designing secure electronic cash system. Very recently, Wang, Tang and Li proposed a new ID-based restrictive partially blind signature (ID-RPBS) and gave the security proof. In this paper, we present a cryptanalysis of the scheme and show that the signature scheme does not satisfy the property of unforgeability as claimed. More precisely, a user can forge a valid message-signature pair (ID; msg; info′; σ′) instead of the original one (ID; msg; info; σ), where info is the original common agreed information and info′ ≠ info. Therefore, it will be much dangerous if Wang-Tang-Li's ID-RPBS scheme is applied to the off-line electronic cash system. For example, a bank is supposed to issue an electronic coin (or bill) of $100 to a user, while the user can change the denomination of the coin (bill) to any value, say $100 000 000, at his will. Electronic Supplementary Material The online version of this article (doi:) contains supplementary material, which is available to authorized users. This work is supported by the National Natural Science Foundation of China under Grant Nos. 60673077, 60503006, 60773202, and 60633030, the National Natural Science Foundation of China-Korea Science and Engineering Foundation Joint Research Project (Grant No. 60611140543) and the National Grand Fundamental Research 973 Program of China (Grant No. 2006CB303104).
%K unforgeability
%K restrictive partially blind signature
%K ID-based cryptography
%K electronic cash<br>信息安全
%K 计算机技术
%K 信息技术
%K 数字签名
%U http://www.alljournals.cn/get_abstract_url.aspx?pcid=5B3AB970F71A803DEACDC0559115BFCF0A068CD97DD29835&cid=8240383F08CE46C8B05036380D75B607&jid=F57FEF5FAEE544283F43708D560ABF1B&aid=AE0EF40E221D4AC8E5ECD4D28B53B7AC&yid=67289AFF6305E306&vid=EA389574707BDED3&iid=0B39A22176CE99FB&sid=FDC7AF55F77D8CD4&eid=1A363081E1FF7014&journal_id=1000-9000&journal_name=计算机科学技术学报&referenced_num=0&reference_num=17