本文系统分析了导致计算机存储介质数据残留的原因及其应对的技术措施,给出了一 种基于覆写的硬盘数据安全删除方法。 关键词:数据残留; 安全删除; 信息安全 Abstract: This paper analyses the data remanence problem, explains the reason of the data remanence, and set up a safety deleting algorithm to solve this kind of problem. Key word: data remanence, safety deleting, information safety