面向存储介质的数据安全删除

随着信息通信技术的快速发展，存储介质中的信息量显著增加，这些信息的长期存储容易导致隐私泄露，仅仅删除存储介质文件索引表无法达到彻底删除的目的，具有一定的安全隐患，如何保护存储介质中的信息隐私安全备受关注.针对上述问题，首先介绍安全删除相关的基础知识，包括存储介质的基本结构、存储原理和删除原理；然后分析主流的数据安全删除标准，并研究这些标准的特性；最后，设计与实现一种能够达到数据不可恢复的安全删除原型系统，并对现有数据删除软件进行测试与分析.结果表明所开发原型系统能够实现存储介质中的数据安全删除，有效保护数据安全与隐私.

Storage Medium-Oriented Data Secure Deletion

With the rapid development of information and communication technology, the amount of information in storage medium is significantly increasing. Just deleting the index file on table cannot really delete the information. Long-term storage of those information may easily lead to data leakage. Therefore, secure deletion of the storage medium is one of the most attractive research areas. In order to address this problem, the basic knowledge about storage medium is introduced in this paper, including the basic structure, the principle of storage and the principle of deletion of the storage medium. Then, some commonly standards of data deletion are analyzed, the characteristics of these standards are studied. Finally, we design and implement a secure deletion prototype system, and the existing data deletion software is tested and analyzed. The result demonstrates that the secure deletion prototype system can safely delete the data in the storage medium and effectively protect users'' privacy.