对基于算术编码的一个数据加密算法的已知明文攻击

An attack with known plaintexts to an encryption algorithm based on arithmetic coding

指出文献[1]设计的数据加密算法在已知明文攻击下是不安全的,基于该加密算法的密文的高位比特对密钥的低位比特的不敏感性,可以利用分割攻击方法求出其全部密钥比特。

It抯 pointed that the encryption algorithm proposed in [1] can be broken by an attack with known plaintexts, and the key of this encryption algorithm can be found by the divide-and-conquer attack based on the fact that the most significant bits of ciphers are not sensitive to the least significant bits of the key.