Ensuring confidentiality of sensitive data is of paramount importance, since data leakage may not only endanger data owners’ privacy, but also ruin reputation of businesses as well as violate various regulations like HIPPA and Sarbanes-Oxley Act. To provide confidentiality guarantee, the data should be protected when they are preserved in the personal computing devices (i.e., confidentiality during their lifetime); and also, they should be rendered irrecoverable after they are removed from the devices (i.e., confidentiality after their lifetime). Encryption and secure deletion are used to ensure data confidentiality during and after their lifetime, respectively.This work aims to perform a thorough literature review on the techniques being used to protect confidentiality of the data in personal computing devices, including both encryption and secure deletion. Especially for encryption, we mainly focus on the novel plausibly deniable encryption (PDE), which can ensure data confidentiality against both a coercive (i.e., the attacker can coerce the data owner for the decryption key) and a non-coercive attacker.

中文翻译：

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通过合理可否认的加密和安全删除确保数据机密性——一项调查

确保敏感数据的机密性至关重要，因为数据泄露不仅可能危及数据所有者的隐私，还会破坏企业声誉，并违反 HIPPA 和萨班斯-奥克斯利法案等各种法规。为提供保密性保证，数据在个人计算设备中保存时应受到保护（即在其生命周期内保密）；而且，它们在从设备中移除后应该不可恢复（即，在它们的生命周期后保密）。加密和安全删除分别用于确保数据在其生命周期内和之后的机密性。这项工作旨在对用于保护个人计算设备中数据机密性的技术进行彻底的文献综述，包括加密和安全删除。特别是在加密方面，我们主要关注新颖的似是而非的加密（PDE），它可以确保数据机密性，防止强制（即攻击者可以强制数据所有者获取解密密钥）和非强制攻击者。