Cryptanalysis of some signcryption schemes in insider-security model
Caixue Zhou · Jisuanji yingyong yanjiu · 2012
This paper analyzed the confidentiality and unforgeability of six signcryption schemes in five papers under insider-security model.The analysis results show that there's existing confidentiality attacks in five schemes and forgeability attacks in four schemes.Then this paper presented some concrete attack methods for these schemes,and analyzed the reasons for the success of attacks.According to the security flaws of these schemes,using the methods of binding receiver in signature part and binding sender in encryption part,it put forward countermeasures against these attacks respectively.