This lesson covers how to maintain a verifiable chain of custody, protect data integrity, and document every transfer or access to evidence during an investigation.
Preserving the Chain of Custody and Data Integrity
This lesson covers how to maintain a verifiable chain of custody, protect data integrity, and document every transfer or access to evidence during an investigation.

Chain of Custody and Data Integrity

Chain of custody is the documented trail showing who handled the evidence, when, and for what purpose. Maintaining this chain protects the reliability and admissibility of information. Any transfer or access must be recorded with date, time, identity, and reason for contact.

Preservation Steps

Store evidence in secure locations with restricted access. Use tamper evident containers or digital hashes to detect alterations. Create exact copies for analysis and keep originals intact whenever possible.

Access Controls and Logs

Implement access controls and audit logs to track who views or modifies items. Regularly review logs for unusual activity and promptly address discrepancies to maintain integrity.

Documentation of Transfers

For every handoff, document the item, its condition, the custody chain, and any disclaimers about the use of the material. This documentation ensures accountability and allows independent verification of the process.