Cost effective data wiping methods for mobile phone

Thanks to the supply of smartphones, mobile phones have come to store increasingly more personal information of users. To protect users’ information, the information stored in mobile phones should not only be managed safety but also be deleted not to allow restoration. In the filesystems that have been applied to existing mobile phones, even when users have deleted information, data are not completely wiped from the storage. Therefore, the data can be easily recovered by using forensics tools. Considering that mobile phones are always exposed to the risk of robberies and loss, this situation can be misused for personal information spill. The present paper points out problems in the methods of data deleting from smartphones, proposes an efficient data deleting method considering mobile device environments with limitations in battery and hardware performance such as smartphones, and analyzes the efficiency of the techniques in relation to the types of filesystems and data formats.