期刊名称：International Journal of Distributed Sensor Networks
印刷版ISSN：1550-1329
电子版ISSN：1550-1477
出版年度：2013
卷号：2013
DOI：10.1155/2013/102508
出版社：Hindawi Publishing Corporation
摘要：Wireless Sensor Network (WSN) has proved its presence in various real time applications and hence the
security of such embedded devices is a vital issue. Certificateless cryptography is one of the recent paradigms to provide security. Certificateless public key cryptography (CL-PKC) deals effectively with the twin issues of certificate management in traditional public key cryptography and key escrow problem in identity-based
cryptography. CL-PKC has attracted special attention in the field of information security as it has opened
new avenues for improvement in the present security architecture. Recently, Tsai et al. proposed an improved
certificateless signature scheme without pairing and claimed that their new construction is secure against
different kinds of attacks. In this paper, we present a security analysis of their scheme and our results
show that scheme does not have resistance against malicious-KGC attack. In addition, we have found some
security flaws in the certificateless signature scheme of Fan et al. and proved the scheme vulnerable to Strong
Type I attack.
