So that in the context of long-term archiving Maintaining the probative value of electronic signatures can be used, the point in time at which the signature was created must be documented conclusively in a suitable "evidence-preserving" IT system. This creates one Archive Timestamp and signs archived documents including their signatures again and again.
If a signed document is then requested from the archive system at any time and it is determined during verification that the cryptographic algorithms and parameters are no longer suitable for security, a Evidence document (with all timestamps generated to date) be proven that this electronically signed document was re-signed in a timely manner and its get legal usability at a hunt.