作　　者： ; ; ; ; ; (钟欣）; (周涛）;

机构地区： 中国科学院半导体研究所

出　　处： 《光通信技术》 2015年第4期1-3,共3页

摘　　要： 介绍了AES-128算法的加、解密原理,从明文和密钥角度分析了AES加密算法的雪崩效应,提出了增量式密钥更新方法,通过在新旧密钥加密的密文之间插入密钥更新符,引导接收端无缝切换密钥。重点研究AES-128加密算法在1.25Gb/s EPON中的应用,通过FPGA和SFP光收发模块搭建实验平台,实现EPON物理层下行数据的加密、解密和密钥更新功能,保证了EPON下行通道数据的安全性。 The paper discusses the principle of AES-128 cipher algorithm, analyzes the avalanche effect of AES algorithm in terms of plaintext and ciphertext, it proposes a method of incremental key update, the key update identifier （KUID） is inserted between the ciphertext encrypted by the old key and the ciphertext encrypted by the new key to update the key seamlessly at the receiver. It works over the application of AES-128 cipher algorithm in 1.25Gb/s EPON, sets up the experimental platform compose of FPGA and the SFP optical transceiver module to realize the encryption of downlink data and the function of key update in the physical lay of EPON, makes sure the safety ofEPON downlink channel data.

关 键 词： 密钥增量 密钥更新

领　　域： [电子电信] [电子电信]