Audit log

A chronological, tamper-evident record of events in a system: who did what, when, and from which address. In a signing process the audit log documents for example when the document was sent, opened and signed, and how the signer was identified. The log is central to the evidential value of electronic signatures and to demonstrating GDPR compliance, such as who accessed sensitive cases. A good audit log cannot be edited after the fact and is stored separately from the data it describes.