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Recommendation on data sanitisation and data medium destruction techniques

This document presents the various existing “sanitisation” techniques (overwriting, cryptographic erasure, degaussing, etc.) for different types of media (HD, SSD, paper, etc.) which either make access to the data impossible on a preserved medium (erasure without the option of recompilation and encryption), or result in the destruction of the medium (without the option of reconstruction).

The recommendation also addresses this processing (sanitisation and destruction) more broadly by detailing its various aspects, both legal (in particular related to the GDPR) and technical or organisational and examines the processing from before the purchase of the medium to the verification and recording of results.

Finally, a summary table shows the reader, according to the type of medium, the recommended sanitisation and destruction techniques to achieve the desired level of confidentiality.