Forward security ensures that compromise of entities today does not impact the security of cryptographic primtitives employed in the past. Such a form of security is regarded as increasingly important in the modern world due to the existence of adversaries with mass storage capabilites and powerful infiltration abilities. Although the idea of forward security has been known for over 30 years, current understanding of what it really should mean is limited due to the prevalence of new techniques and inconsistent terminology. We survey existing methods for achieving forward security for different cryptographic primitives and propose new definitions and terminology aimed at a unified treatment of the notion.

中文翻译：

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前向安全的现代观点

前向安全性确保当今实体的入侵不会影响过去使用的加密原语的安全性。由于存在具有海量存储能力和强大渗透能力的对手，这种形式的安全性在现代世界中被认为越来越重要。尽管前向安全的概念已经为人所知 30 多年，但由于新技术的流行和不一致的术语，目前对其真正含义的理解是有限的。我们调查了为不同密码原语实现前向安全性的现有方法，并提出了旨在统一处理该概念的新定义和术语。