一种可用于光学密码的安全增强工作模式  

A Security Enhanced Mode of Operation Can Be Used in Optical Cryptography

作　　者：袁科[1] 贾春福[1] 吕述望[2] 黄贻望[3] 高社成[4] 

机构地区：[1]南开大学信息技术科学学院,天津300071 [2]中国科学院信息安全国家重点实验室,北京100083 [3]武汉大学软件工程国家重点实验室,武汉430072 [4]南开大学光学信息技术教育部重点实验室,天津300071

出　　处：《电子与信息学报》2013年第3期735-741,共7页Journal of Electronics & Information Technology

基　　金：国家自然科学基金(60973141;61272423);国家重点基础研究发展计划项目(2013CB834204);高等学校博士学科点专项科研基金(20100031110030)资助课题

摘　　要：为满足云计算对高安全、高效率密码方案的需求,该文提出一种安全增强密码工作模式——密码反馈"一组一密"(Cipher FeedBack one Block one Key,CFB-BK)模式,并基于数学密码和光学密码组合实现:光学密码对数据分组进行"一组一密"加解密,数学密码利用光学密码密文生成供光学密码下一组数据加解密使用的密钥。安全性分析表明,攻击者在密码学技术范围内,只能采用穷举密钥攻击方式,攻击复杂度高;效率分析表明,比基于数学密码实现的模式效率更高。For meeting the high security and high efficiency of cryptography schemes in Cloud Computing, a security enhanced cryptographic mode of operation named Cipher FeedBack one Block one Key （CFB-BK） is proposed, and this mode is implemented based on the combination of mathematical cryptography and optical cryptography. Optical cryptography module encrypts （or decrypts） data blocks in a ＂one block one key＂ way. Moreover, it provides its ciphertext as a feedback to the mathematical cryptography module, which uses it to generate keys for the next block encryption （or decryption） of the optical cryptography module. Security analysis shows that the only possible attack in the area of cryptography for the proposed scheme is exhaustive attack, indicating that no adversary could get a significant advantage against the scheme without spending a huge amount of recourses and time. Efficiency analysis shows that the scheme implementing CFB-BK mode works much faster than the existing modes implemented based on mathematical cryptography.

关 键 词：云计算 光学密码 数学密码 密码反馈一组一密模式 一组一密 

分 类 号：TP309.07[自动化与计算机技术—计算机系统结构]