Meaning
Third-party service providers offer a trusted clock that issues cryptographically secure proof of when a specific digital event occurred. A timestamp authority links a data file to a precise moment in time, verified against a national or international time standard. This evidence is necessary for patent filings and legal contracts where the sequence of events is legally decisive.
Security Protocol
The process begins when a user sends a hash of their document to the external server. The timestamp authority combines this hash with the current time and signs the package with a private key. Because the actual content of the file is never sent, the privacy of the document is maintained throughout the operation.
Legal Admissibility
Certificates issued by these entities carry weight in court as proof that a record existed before a certain date. In many jurisdictions, a timestamp authority must be officially accredited to provide signatures for government or regulatory filings. This status ensures that the time source is accurate and the signing process is secure.
Operational Integrity
Infrastructure for these services must be highly available and resilient against cyber attacks. If the clock of the authority is compromised, the validity of every signature it issued becomes questionable. High-end providers use atomic clocks and hardware security modules to maintain the highest levels of precision.
