Audit trails that stand up in disclosure
Every serious investigation produces an audit trail: a record of who viewed, edited, exported or shared what, and when. But not all audit trails are equal. When a matter is reviewed or disclosed, the question is not whether you kept a log, but whether that log can be trusted.
Append-only, not editable
The first requirement is that the record cannot be quietly changed. An audit trail that can be edited or deleted proves nothing. Enforcing append-only writes at the database, so entries can be added but never altered or removed, is the foundation.
Tamper-evident by design
Stronger still is a tamper-evident log, where each entry includes a cryptographic hash of the previous entry. Any change to a past record breaks the chain and is immediately detectable on verification.
This is the difference between asking someone to trust your log and being able to prove its integrity mathematically.
What to record
A defensible trail captures the security-relevant actions: authentication, case creation and closure, evidence upload, download and sealing, permission changes, and report generation, each with the actor and a precise timestamp.
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