摘要
在单密钥密码体制的通信中,加密与解密必须使用相同密钥,通信双方如何在不安全的网络环境下安全地交换、管理密钥以及应对密钥泄漏是保障密码安全的关键。流密码提供了一种安全的密钥交换方式,在拥有简单和速度优势的同时,通信双方无需在信道上交换密钥,从物理上避免了密钥进入公网环境。介绍了RC4流密码的原理、优点、在通信项目中的实际应用、保持密钥流同步的方法以及失去同步后恢复的方法。
Ciphering and deciphering must use the same key during a single-key-cipher system communication. In this case,how do the messengers exchange and keep their key is important for the security. Stream cipher is a kind of cipher which can exchange key safely. The key stream does not need to be transferred on Internet. This article introduces the principle and advantages of a stream cipher based on RC4 algorithm and how to realize it and synchronize with the other messenger and re-synchronize with each other.
作者
刘程远
Liu Chengyuan(China Electronics Great Wall hfformation Security System（Shenzhen）Co.,Ltd.,Shenzhen 518057,China)
出处
《信息技术与网络安全》
2018年第9期31-33,41,共4页
Information Technology and Network Security
关键词
流密码
RC4
单密钥
stream cipher
RC4
single-key-cipher
