What the Belgian centre sets out for the heaviest of its assurance levels, and the only place in this record where a national authority names the insider as something the detection tools are there to catch.
Everyone involved in the response records what they did, in a way that prevents the record being tampered with or deleted, and the lead is answerable for documenting the whole investigation, its timelines, its decisions, and the sources of what it relied on. The incident data and their metadata, the source and the time of collection among them, are collected and protected so that they stay accurate, authentic, and traceable to where they came from.
What the German federal authority holds to be the state of the art, in numbered requirements, among them the checking of a candidate’s own account of themselves, a logging infrastructure the administrators who run it cannot alter, a regular audit of the detection systems against the state they are supposed to be in, and how evidence is secured.
Every step taken in securing evidence should be documented, and the documentation should show without a gap how the original evidence was handled, which methods were used, and why the people responsible chose them. The originals should be stored so that only the staff conducting the examination, known by name, can reach them.