NIST Guidelines for Disk Wiping
When storage media are transferred, become obsolete, or are no longer usable or required by an information system, it is important to ensure that residual magnetic, optical, or electrical representation of data that has been deleted is not easily recoverable. Sanitization refers to the general process of removing data from storage media, such that there is reasonable assurance, in proportion to the confidentiality of the data, that the data may not be retrieved and reconstructed.
This guide will assist organizations and system owners in making practical sanitization decisions based on the level of confidentiality of their information. It does not, and cannot, specifically address all known types of media; however, the described sanitization decision process can be applied universally. PDF:Guidelines for Media Sanitization Via LiveAmmo Security News: NIST Guidelines for Disk Wiping
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