Chain of Custody

Chain of Custody: Comprehensive documentation of the possession, transfer, and handling of digital evidence. The term is relevant to evidentiary investigation and reconstruction. Data must be secured in a traceable manner, preserved unaltered, expertly analyzed, and fully documented.

How it works and where it fits

Chain of Custody belongs to a prepared workflow for handling security-relevant events. A technical signal becomes a substantiated incident only through triage, context, and assessment. Roles, decision authority, escalation paths, and stopping conditions should therefore be agreed in advance so actions remain consistent under time pressure.

Practical security relevance

Execution must balance rapid containment with careful evidence preservation. Actions should not unnecessarily destroy important traces or disrupt business operations without control. Timelines, decisions, and changes are documented; after recovery, root causes, identified gaps, and lessons learned feed back into controls, detection logic, and response plans.

Related concepts

• Digital ForensicsDigital ForensicsPreserves and analyzes digital traces to reconstruct security-relevant events.: Preserves and analyzes digital traces to reconstruct security-relevant events.
• Forensic ImageForensic ImageA bit-for-bit copy of a storage medium for forensic analysis.: A bit-for-bit copy of a storage medium for forensic analysis.
• Incident ResponseIncident ResponseA structured process for the preparation, detection, containment, eradication, and post-incident review regarding security incidents.: A structured process for the preparation, detection, containment, eradication, and post-incident review regarding security incidents.
• Incident TriageIncident TriageRapid classification and prioritization of a potential security incident.: Rapid classification and prioritization of a potential security incident.