Electronic Timestamp

An Electronic Timestamp is a trust service that binds a set of data to a particular point in time, providing cryptographic evidence that the data existed and was in a specific form at that moment. Under eIDAS, timestamps are used to prove the existence and integrity of documents, transactions, and other digital data at a given time, a capability that is essential in legal, financial, and regulatory contexts. Qualified Electronic Timestamps, issued by Qualified Trust Service Providers, enjoy a legal presumption of accuracy of the date and time they indicate and of the integrity of the data to which the date and time are bound.

This legal presumption is valid across all EU Member States. eIDAS 2.0 retains the qualified timestamp as a core trust service.

Timestamps are commonly combined with electronic signatures and seals: a signed document is timestamped to prove not only who signed it but when it was signed. This is critical for long-term validation, where a signature must remain verifiable even after the signing certificate has expired. The timestamp proves the signature was valid at the time it was applied.

In the context of the EUDIW, timestamps may be used in wallet transaction logs, credential issuance records, and audit trails. They also play a role in regulatory compliance scenarios such as financial trade recording, intellectual property filings, and contract execution timelines. For businesses, integrating qualified timestamps into document workflows is a straightforward way to enhance legal certainty and regulatory compliance, particularly when dealing with cross-border transactions or disputes where the timing of events is material.