Security analysis and improvement of certificateless signature scheme without bilinear pairing
DU Wei-zhang · Journal of Computer Applications · 2013
By analyzing the security of a certificateless signature scheme without bilinear pairing proposed by Wang Shengbao,et al.(WANG S B,LIU W H,XIE Q.Certificateless signature scheme without bilinear pairings.Journal on Communications,2012,33(4) : 93-98),it indicated that the scheme could not resist malicious attack of positive dishonest Key Generation Center(KGC).For this kind of attack,detailed attack method was given,and an improved scheme was proposed.Finally,the security of the improved scheme was analyzed.The result shows that the proved scheme can resist the malicious KGC attack,maintain efficiency of the original scheme and has higher security.Meanwhile,the communication complexity is reduced due to the elimination of the security channel.