Conservation documentale is the long-term preservation of documents so they remain accessible, readable, and verifiable over time. In cyber security, it is more than simple backup: it includes preserving the file itself, its metadata, signatures, timestamps, version history, and audit logs. Common controls include immutable storage, checksum verification, retention policies, and controlled format migration to keep records usable as software changes.
This matters because attackers often try to destroy or alter evidence after an incident, including contracts, reports, logs, or signed files. Good conservation documentale helps defenders prove what a document looked like at a given time and detect tampering or unauthorized changes. It supports legal review, incident response, and digital forensics. However, preservation does not prove that a document was created correctly; it only protects the artifact and the evidence around it.