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In view of the existing forward secure digital signature scheme can¡¯t guarantee to safety,and some problems such as forgery attacks,this paper presents a kind of strong forward secure digital signature scheme based on elliptic curves cryptosystems .The scheme of this paper makes attacker couldn¡¯t forge the signer¡¯s the time other time valid signature by introducing dual key technology even if they get the signer¡¯s a period of two keys,to ensure that the scheme has ¡°two-way security¡±.Through the security and computational complexity analysis of the scheme,it show that the scheme not only correct,valid and high safety,but has smaller computational complexity,higher efficiency,etc.The scheme has important theoretical and practical value.

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Ëï·ÉÁú: ½ð±Ò+10, ·­ÒëEPI+1, ¡ï¡ï¡ïºÜÓаïÖú, ×ÜÌåºÜµ½Î»£¬¶àлÁË 2014-07-18 13:21:27
In view of the fact that  the existing forward secure digital signature scheme can not guarantee  safety,and it has some problem such as forgery attacks,this paper presented  a kind of strong forward secure digital signature scheme based on elliptic curves cryptosystems .Such scheme prevent attackers from  forging  the signer¡¯s  valid signature of both time point  by introducing dual key technology even if they get the signer¡¯s   two keys of a certain period  to aquire ¡°two-way security¡±.The security and computational complexity analysis of the scheme  showed  that it was not only correct,valid and highly safety,but with  smaller computational complexity,higher efficiency,etc.,and  has important theoretical and practical value.
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