这个源程序是对单钥密码算法IDEA的简单实现，非常适合刚开始学密码学的人。-the single source of key IDEA cipher algorithm to achieve a simple, very suitable for the beginning of school cryptography people.

IDEA是一个分组长度为64位的分组密码算法，密钥长度为128位（抗强力攻击能力比DES强），同一算法既可加密也可解密。 IDEA的“混淆”和“扩散”设计原则来自三种运算，它们易于软、硬件实现（加密速度快）： -IDEA is a packet length of the 64 block cipher algorithms, key length of 128 (anti strong offensive capability

这个源程序是对单钥密码算法IDEA的简单实现，非常适合刚开始学密码学的人。-the single source of key IDEA cipher algorithm to achieve a simple, very suitable for the beginning of school cryptography people.

IDEA算法源码，经过优化，含有测试用例-IDEA algorithm source code, after optimization, containing the test case