This paper offers a compound chaotic system based mutiple model used as sequence cipher, which has a high encryption speed, a large key space and is difficult to crack.

本文提出一种基于多模型的混合混沌系统，它具有加密速度快，密匙空间大，不容易破解的优点。

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It is proved that this public key cryptosystem based on compound encryption has not been influenced on time complexity and space complexity, but it has more security t.

实践表明，这种基于复合加密的公钥密码系统，算法的时间复杂度和空间复杂度并未受到影响，但其安全性较早期各同类系统更高、更易被用户采纳。

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The advantages of this algorithm were, rapidity of encryption, carried out easily by computer, ampliative secret key space and so on.

该算法有加密速度快、易于计算机实现、密钥空间大等优点。

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In fact, just the opposite occurred, it spawned the development of foreign firms in the encryption space and the launch of competing products.

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But during the process of encryption, unencrypted copies of those files were stored in the unallocated space, where discarded files are temporarily kept in pieces without the identifying data to find them or reassemble them easily.

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