【摘要】 已有文献中提出了一个基于背包问题的公钥密码系统， 该系统不涉及任何超递增的因素， 并具有很高的密度， 另一文献中， 利用Ｓ Ｖ 算法给出了一种破译方法． 本文给出了这种背包问题的公钥密码系统另一种新的破译方法更多还原

【Abstract】 In the stated ducomeents,a new Knapsack?based public key cryptosystem is proposed.The system does not involve any super increasing sequence of Knapsack components but has a high density.In an attack to this system by the S?V method has been presented.A new attack method is presented to the new cryptosystems.更多还原