摘要： 针对软磨硬泡攻击和唯密文攻击等攻击，提出了密钥可信性的概念，设计了一种密钥可信度低的密码体制，应用该算法模型加密可以很容易得到伪密钥，从而可以误导和迷惑密码分析者。适合于高度机密、密钥容易被截获、密钥的存放没有安全保障、具有很强的运算能力或者对于速度要求不是非常高的情形。

关键词: 软磨硬泡攻击, 密码学, 自然语言处理

Abstract: The paper brings out the concept of key authentic degree in the light of the rubber-hose attack and ciphertext only attack. At the same time, a new cryptosystem that has low key authentic degree is designed. When it is used to encrypt, it is easy to find pseudokeys that can confuse and mislead cryptanalyst.

Key words: Rubber-hose attack, Cryptography, Nature language processing