Digital Evidence ISO/IEC 27037 -v- ISO/IEC 17025

Could ISO/IEC 27037:2012 be the better option for handling and obtaining digital forensic evidence?

ISO/IEC 27037:2012-10 (E)
Information technology - Security techniques - Guidelines for identification,
collection, acquisition and preservation of digital evidence

Contents
Foreword .......................................................................................................................................................... v
Introduction ..................................................................................................................................................... vi
1 Scope ............................................................................................................................................... 1
2 Normative reference ....................................................................................................................... 1
3 Terms and definitions .................................................................................................................... 2
4 Abbreviated terms .......................................................................................................................... 4
5 Overview ......................................................................................................................................... 6
5.1 Context for collecting digital evidence ........................................................................................ 6
5.2 Principles of digital evidence........................................................................................................ 6
5.3 Requirements for digital evidence handling ............................................................................... 6
5.3.1 General ............................................................................................................................................ 6
5.3.2 Auditability ...................................................................................................................................... 7
5.3.3 Repeatability ................................................................................................................................... 7
5.3.4 Reproducibility ............................................................................................................................... 7
5.3.5 Justifiability .................................................................................................................................... 7
5.4 Digital evidence handling processes ........................................................................................... 8
5.4.1 Overview ......................................................................................................................................... 8
5.4.2 Identification ................................................................................................................................... 8
5.4.3 Collection ........................................................................................................................................ 9
5.4.4 Acquisition ...................................................................................................................................... 9
5.4.5 Preservation.................................................................................................................................. 10
6 Key components of identification, collection, acquisition and preservation of digital
evidence ........................................................................................................................................ 10
6.1 Chain of custody .......................................................................................................................... 10
6.2 Precautions at the site of incident.............................................................................................. 11
6.2.1 General .......................................................................................................................................... 11
6.2.2 Personnel ...................................................................................................................................... 11
6.2.3 Potential digital evidence ............................................................................................................ 12
6.3 Roles and responsibilities ........................................................................................................... 12
6.4 Competency .................................................................................................................................. 13
6.5 Use reasonable care .................................................................................................................... 13
6.6 Documentation ............................................................................................................................. 14
6.7 Briefing .......................................................................................................................................... 14
6.7.1 General .......................................................................................................................................... 14
6.7.2 Digital evidence specific ............................................................................................................. 14
6.7.3 Personnel specific ........................................................................................................................ 15
6.7.4 Real-time incidents ...................................................................................................................... 15
6.7.5 Other briefing information ........................................................................................................... 15
6.8 Prioritizing collection and acquisition ....................................................................................... 16
6.9 Preservation of potential digital evidence ................................................................................. 17
6.9.1 Overview ....................................................................................................................................... 17
6.9.2 Preserving potential digital evidence ......................................................................................... 17
6.9.3 Packaging digital devices and potential digital evidence ........................................................ 17
6.9.4 Transporting potential digital evidence ..................................................................................... 18
7 Instances of identification, collection, acquisition and preservation .................................... 19
7.1 Computers, peripheral devices and digital storage media ..................................................... 19
7.1.1 Identification ................................................................................................................................ 19
7.1.2 Collection ..................................................................................................................................... 21
7.1.3 Acquisition ................................................................................................................................... 25
7.1.4 Preservation ................................................................................................................................. 29
7.2 Networked devices ...................................................................................................................... 29
7.2.1 Identification ................................................................................................................................ 29
7.2.2 Collection, acquisition and preservation .................................................................................. 31
7.3 CCTV collection, acquisition and preservation ........................................................................ 33
Annex A (informative) DEFR core skills and competency description ................................................... 35
Annex B (informative) Minimum documentation requirements for evidence transfer .......................... 37
Bibliography .................................................................................................................................................. 38