This paper introduces two different types of attacks on a recently proposed cryptosystem based on chaotic standard and logistic maps. In the two attacks, only a pair of (plaintext/ciphertext) was needed to totally break the cryptosystem.

分布: 二项式分布、指数分布、逻辑函数分布、正态分布、泊松分布(distrubutions: binomial distribution,exponential distribuion,logistic distribution,Normal distribution and poisson distribution)