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密码算法作为信息安全的关键技术,保证了信息和通信的安全性。然而密码算法的实现需要依附特定的物理设备平台,在运行时会与所处的环境发生物理交互作用,这些物理效应信息与密码算法本身存在相关性。攻击者可以利用密码系统实现时所观测到的物理特性来获得秘密信息,对密码系统的安全构成严重威胁。文章阐述侧信息攻击的基本原理,分析三类典型的攻击方法,针对性地提出防御策略,最后探讨侧信息密码攻击的发展趋势。
As the key technology of information security, the password algorithm ensures the security of information and communication. However, the implementation of the cryptographic algorithm needs to be attached to a specific physical device platform and physically interact with the environment at runtime. These physical effect information are related to the cryptographic algorithm itself. An attacker can use the physical characteristics observed when the cryptographic system is implemented to obtain the secret information, posing a serious threat to the security of the cryptographic system. The article expounds the basic principle of the side information attack, analyzes three typical attack methods, puts forward the defensive strategy in a targeted manner, and finally discusses the development trend of the side information password attack.