Data node encrypted file system: efficient secure deletion for flash memory
Security'12 Proceedings of the 21st USENIX conference on Security symposium
TrueErase: per-file secure deletion for the storage data path
Proceedings of the 28th Annual Computer Security Applications Conference
Password-based single-file encryption and secure data deletion for solid-state drive
Proceedings of the 8th International Conference on Ubiquitous Information Management and Communication
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As more mobile storage devices are used in consumer electronics, possibility of user confidential data leakage increases. To make things worse, data of deleted file in mobile storage such as USB drives can be easily recovered and, thus, can be vulnerable to data leakage. To prevent this type of data leakage, efficient secure deletion techniques are required and we present two secure deletion techniques, namely block cleaning and zero overwriting, for flash memory storage. Also, we propose cost and benefit models of both techniques. The models imply an existence of an efficient adaptive hybrid secure deletion scheme that applies one of the techniques based on their costs and benefits at given data arrangements. Experimental results measured on an embedded board show that the adaptive hybrid scheme deletes data securely and efficiently for various data patterns on flash memory storage.