说明：  随着计算机和通信技术的飞速发展，密码学已经渗透到了***、经济、文化乃至个人隐私等领域，使用加密技术来保护信息的安全变得越来越重要。这篇 论文 的重点在于通过对加密算法的学习来对它们进行比较，并将它们运用到实践中。
(With the computer and communications technology, the rapid development of cryptography has penetrated into the political, economic, cultural and other fields as well as privacy, use encryption to protect information security becomes increasingly important. This paper focuses on learning through the encryption algorithm to compare them, and them into practice.)