抗主动攻击的隐秘通信方案

Securing schemes of steganography against active attacks

针对隐秘通信过程中存在的破坏、篡改、伪造3种主动攻击行为进行了比较系统地分析,使用计算复杂性理论给出了明确的定义,运用密码学中的密码Hash函数和数字签名技术,提出了两种能够抗击主动攻击行为的隐秘通信方案,从理论上证明了该方案对主动攻击的安全性.

The active attacks (namely damage, substitution fraudulent and impersonative fraudulent) to steganographic system are discussed. They are defined from a complexity-theoretic point of view. By applying secure cryptographic Hash function and public-key signature scheme, two novel steganographic systems are constructed. The security of the systems against these attacks is proved in theory.