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LOCKEDMOBILEDEVICES · A GUIDE FOR UK LAWYERS Locked Mobile Devices Preservation, Access Routes, Legal Authority and the Decisions That Must Be Made Before Anyone Tries the Passcode COMPUTER FORENSICS LAB DISCOVERY. UK

§ ABOUT THE AUTHOR PREPARED BY COMPUTER FORENSICS LAB E-DISCOVERY TEAM ESTABLISHED 2007 · LONDON ISO 17025-ALIGNED PROCEDURES LOCKED-DEVICE ASSESSMENT LAWFUL ACCESS & ENSEMBLE STRATEGY CPR PART 35 EXPERT REPORT S FULL CHAIN-OF-CUSTODY DOCUMENTATION

§ CONTENTS In this guide 01 Executive summary 02 The problem in plain English: the wall that is some time s a door 03 First decisions: state, custody and the things nobody must do 04 The access routes, ranked by realism 05 Legal authority: consent, contract, compulsion and s.49 RIPA 06 Risk management: attempts, biometrics, lockouts and wipes 07 Strategy: the parallel-tracks framework 08 Source architecture: where else the evidence lives 09 Worked examples 10 Common mistakes and technical limitations 11 Questions to ask · Suggested wording 12 Checklist and red flags · When to involve a digital forensic expert 13 Frequently asked questions 14 Glossary · References · Disclaimer · How a specialist laboratory can assist

§ 01 · ORIENTATION Executive summary THE HEADLINE POINT: ALOCKEDDEVICEISASTRATEGYPROBLEMWITHATECHNICAL COMPONENT, ANDTHESTRATEGYHASPARALLELTRACKS

§ 02 · FIRST PRINCIPLES The problem in plain English: the wall that is some time s a door

§ 03 · HOURONE First decisions: state, custody and the things nobody must do