Editing Data remanence (section)

===Purging===

'''Purging''' or '''[[Sanitization (classified information)|sanitizing]]''' is the physical rewrite of sensitive data from a system or storage device done with the specific intent of rendering the data unrecoverable at a later time.<ref>{{Cite book|url=https://www.worldcat.org/oclc/759924624|title=Encyclopedia of cryptography and security|date=2011|publisher=Springer|others=Tilborg, Henk C. A. van, 1947-, Jajodia, Sushil.|isbn=978-1-4419-5906-5|edition=[2nd ed.]|location=New York|oclc=759924624}}</ref> Purging, proportional to the sensitivity of the data, is generally done before releasing media beyond control, such as before discarding old media, or moving media to a computer with different security requirements.