The Encryption Methods in ECPS2 and ECPS3 Are Not Secure

Long Yonghong

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The Encryption Methods in ECPS2 and ECPS3 Are Not Secure

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- The Encryption Methods in ECPS2 and ECPS3 Are Not Secure
- Acta Electronica Sinica Issue 1, (1995)
- 作者机构：
  
  湘潭大学计算机科学系
- 作者简介：
- 基金信息：
- DOI：
  CLC： TN918.4
- Published：1995
- 稿件说明：
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[1]隆永红.ECPS2和ECPS3中的加密也是不安全的[J].电子学报,1995(01):15-20.

Long Yonghong. The Encryption Methods in ECPS2 and ECPS3 Are Not Secure[J]. Acta Electronica Sinica, 1995, (1).
[1]隆永红.ECPS2和ECPS3中的加密也是不安全的[J].电子学报,1995(01):15-20. DOI：

Long Yonghong. The Encryption Methods in ECPS2 and ECPS3 Are Not Secure[J]. Acta Electronica Sinica, 1995, (1). DOI：

摘要

本文讨论了基于纠错码的公钥体制ＥＣＰＳ２和ＥＣＰＳ３中加密过程的安全性，指出可以在Ｏ（ｎ￣３）时间内由体制的公开钥信息找到一个置换矩阵，用它也可以解密由秘密置换阵加密的消息，其中ｎ为秘密置换阵的行（列）数．进而，本文给出了用所找到的置换阵破译ＥＣＰＳ２加密和ＥＣＰＳ３部分情况下加密的方法。

Abstract

In this paper

the security problem of the encryption procedures in the public key cryptosystems ECPSZ and ECPS3 which are based on error correcting codes is discussed.It is pointed out that a permuation matrix can be found in time O（n3） from the public information of the cryptosystems

which can be used to decrypt the ciphertexts encrypted with the secret permutation matrix

where n is the mumber of rows（columns） in the secret permutaion matrix.Further

detailed procedure to attack ECPS2 is described.

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