IDEA 加解密算法.然而，社会对计算机网络的高度依赖同时也蕴藏着巨大的风险。网络攻击、网络欺诈、网络犯罪将会给社会带来巨大的经济损失和秩序动荡，甚致会使整个人类社会陷入危机。因此，网络和信息系统的安全保密这一个必须解决的问题，已引起了全球社会的极大关注。-IDEA encryption algorithm. However, the community is highly dependent on computer networks but also a huge risk. Network attacks, network fraud, cyber crime to society will be enormous economic losses and the order of turbulence, even the whole of human society into crisis. Therefore, networks and information systems security and confidentiality a problem that must be solved, has aroused great concern to the global community.