Attesta timestamp service

Tests have been passed, your browser is capable to perform local cryptogaphic processing

How does it work?

The examined files are never transmitted over the network. The complex signature (stamp) is calculated locally on this page with client side javascript (that means it is executed locally in your browser). This can take a while on the big files. Only the stamp, which is a computed signature of your file is transmitted and processed by the ATTESTA service. It is not possible to guess the contents of your file by the signature.

The signature is enough long and comlex to make the occasional or not collision practically impossible. If the system knows the signature, it reveals its creation date and the optional information that was supplied with the stamp.

It is not possible to alter the timestamp or the information of the stamp. In some cases the person who stamped it can remove the stamp, but nobody can not modify it.