Sensitive data need to be protected from being stolen and read by unauthorized persons regardless of whether the data are stored in hard drives, flash memory, laptops, desktops, and other storage devices. In an enterprise environment where sensitive data is stored on storage devices, such as financial or military data, encryption is used in the storage device to ensure data confidentiality. Nowadays, the SSD-based NAND storage devices are favored over HDD and SSHD to store data because they offer increased performance and reduced access latency to the client. In this paper, the performance of different symmetric encryption algorithms is evaluated on HDD, SSHD, and SSD-based NAND MLC flash memory using two different storage encryption software. Based on the experiments we carried out, Advanced Encryption Standard (AES) algorithm on HDD outperforms Serpent and Twofish algorithms in terms of random read speed and write speed (both sequentially and randomly), whereas Twofish algorithm is slightly faster than AES in sequential reading on SSHD and SSD-based NAND MLC flash memory. By conducting full range of evaluative tests across HDD, SSHD, and SSD, our experimental results can give better idea for the storage consumers to determine which kind of storage device and encryption algorithm is suitable for their purposes. This will give them an opportunity to continuously achieve the best performance of the storage device and secure their sensitive data.

中文翻译：

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使用不同存储设备评估敏感数据的加密算法

无论数据是否存储在硬盘、闪存、笔记本电脑、台式机和其他存储设备中，都需要保护敏感数据不被未经授权的人窃取和读取。在敏感数据存储在存储设备上的企业环境中，例如金融或军事数据，在存储设备中使用加密以确保数据机密性。如今，基于 SSD 的 NAND 存储设备在存储数据方面比 HDD 和 SSHD 更受青睐，因为它们提供更高的性能并减少对客户端的访问延迟。在本文中，使用两种不同的存储加密软件在 HDD、SSHD 和基于 SSD 的 NAND MLC 闪存上评估了不同对称加密算法的性能。根据我们进行的实验，HDD上的高级加密标准（AES）算法在随机读取速度和写入速度（顺序和随机）方面优于Serpent和Twofish算法，而Twofish算法在SSHD和基于SSD的NAND MLC闪存上的顺序读取方面略快于AES记忆。通过对 HDD、SSHD 和 SSD 进行全方位的评估测试，我们的实验结果可以为存储消费者提供更好的想法，以确定哪种存储设备和加密算法适合他们的用途。这将使他们有机会持续实现存储设备的最佳性能并保护他们的敏感数据。而 Twofish 算法在 SSHD 和基于 SSD 的 NAND MLC 闪存上的顺序读取比 AES 略快。通过对 HDD、SSHD 和 SSD 进行全方位的评估测试，我们的实验结果可以为存储消费者提供更好的想法，以确定哪种存储设备和加密算法适合他们的用途。这将使他们有机会持续实现存储设备的最佳性能并保护他们的敏感数据。而 Twofish 算法在 SSHD 和基于 SSD 的 NAND MLC 闪存上的顺序读取比 AES 略快。通过对 HDD、SSHD 和 SSD 进行全方位的评估测试，我们的实验结果可以为存储消费者提供更好的想法，以确定哪种存储设备和加密算法适合他们的用途。这将使他们有机会持续实现存储设备的最佳性能并保护他们的敏感数据。