Table of contents

Long format appendix

The current draft of the Ministry of Justice (MoJ) commodity long format data destruction appendix. The appendix is a dependency of the long format clause itself.

Highlighted words indicate potential requirement for contextual change, requirement of definition and so on.


The following standards and guidelines are the minimum basis for data decommissioning or destruction. Follow and apply them as appropriate. There might also be extra steps specific to a data set or system.

Data Destruction for electronic/magnetic storage must include, unless otherwise superseded by NCSC, PCI-DSS or specific Authority guidance:

  • the revocation or otherwise destruction of decryption keys and/or mechanisms to render data inaccessible or otherwise void through the use of modern cryptography; AND/OR

  • data overwriting methods consisting of at least 3 (three) complete overwrite passes of random data.

Data Destruction for printed materials must include, unless otherwise superseded by NCSC or specific Authority guidance:

  • paper cross-shredding methods to satisfy at least the DIN 66399 Level 4 standard with a maximum cross cut particle surface area 160 (one hundred and sixty) millimetres squared with a maximum strip width of 6 (six) millimetres

The required outcome is to ensure that Authority data is inaccessible by any reasonable commercial and resourced means (such as commercially available data recovery services).


If you have any questions or comments about this guidance, such as suggestions for improvements, please contact: