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随着智能ＩＣ（ｉｎｔｅｇｒａｔｅｄｃｉｒｃｕｉｔ）卡应用领域的不断扩大，系统所需的随机数的好坏成为人们的研究重点之一．随机数在ＩＣ卡应用系统中用于卡片和读卡机之间的认证、数据加密及其安全传输．文中在分析离散Ｌｏｇｉｓｔｉｃ映射产生混沌序列的白噪声特性基础上，结合ＩＣ卡的历史运行记录，给出了适于ＩＣ卡产生随机数的方法．仿真结果表明，该方法产生的混沌序列自相关性和互相关性良好，并且能保证迭代初始值未知，保证序列的随机性，适合ＩＣ卡应用．
With the continuous expansion of the applications of the smart IC (integrated circuit) card, the random numbers required by the system become one of the focuses of people’s research. The random number is used in the IC card application system for authentication between card and card reader, data encryption and its secure transmission. Based on the analysis of the white noise characteristics of chaotic sequences generated by discrete Logistic map and the historical records of IC cards, this paper presents a method suitable for generating random numbers in IC cards. The simulation results show that the chaotic sequences generated by this method have good autocorrelation and cross-correlation and can guarantee the initial value of the iteration to be unknown and ensure the randomness of the sequences, which is suitable for IC card applications.