In this paper, we propose and analyze two different stream ciphers based on a Skew Tent Map and a Modified Logistic Map respectively. In order to improve the randomness of these systems, a single method for increasing the period length of the generated sequences has been applied. The results prove that the randomness of these systems can be severally increased by using this method, making these systems suitable for secure communications.

翻译：本文提出并分析了两种不同的流密码，分别基于斜帐篷映射和修正逻辑斯蒂映射。为改善这些系统的随机性，采用了一种增加生成序列周期长度的单一方法。结果表明，该方法能显著提高这些系统的随机性，使其适用于安全通信。