Non-volatile EPROM media is sanitised by applying three times the manufacturer’s specified ultraviolet erasure time and then overwriting it at least once in its entirety with a random pattern followed by a read back for verification.
Topic
Non-volatile erasable programmable read-only memory media sanitisation
Applicable to
all
History
Priority
must
Dec 2021
Non-volatile EPROM media is sanitised by applying three times the manufacturer’s specified ultraviolet erasure time and then overwriting it at least once in its entirety with a random pattern followed by a read back for verification.
Miscellaneous changes were made to rationale and security controls throughout the publication. This included:
• A review from the Using the Information Security Manual chapter through to the Guidelines for Media chapter.
• Security controls suitable for all audiences have been identified with the ‘All’ applicability marking while additional security controls suitable for just government audiences have been identified with the O, P, S and TS applicability markings.
• Security controls suitable for specific classifications have been amended to include their classification(s) in the wording of the security controls to reduce the reliance on applicability markings to confer suitability.
• Tables in security controls have been converted into prose to allow for inclusion in the SSP annex template and the XML list of security controls.
• The use of ‘official’ and ‘highly classified’ terminology has been replaced with specific classifications to remove ambiguity.
• Security controls relating to high assurance ICT equipment have had their applicability narrowed to ‘S, TS’ reflecting that they are intended for the protection of SECRET and TOP SECRET systems and data.
2017
Agencies must sanitise non-volatile EPROM media by erasing in accordance with themanufacturer’s specification, increasing the specified ultraviolet erasure time by a factor ofthree, then overwriting the media at least once in its entirety with a random pattern, followedby a read back for verification.
Control Text Changed. No public explaination.
2015
Agencies must sanitise non–volatile EPROM media by erasing in accordance with themanufacturer’s specification, increasing the specified ultraviolet erasure time by a factor ofthree, then overwriting the media at least once in its entirety with a random pattern, followedby a readback for verification.
2010
Agencies must sanitise non-volatile EPROM media by erasing in accordance with the manufacturer’sspecification, increasing the specified ultraviolet erasure time by a factor of three, then overwriting themedia at least once in its entirety with a pseudo random pattern, followed by a read back for verification.
2008
Agencies must sanitise non-volatile EPROM media by erasing as per the manufacturer’s specification, increasing the specified ultraviolet erasure time by a factor of three, then overwriting the media once in its entirety with a pseudo random pattern, followed by a read back for verification.