What is the time stamp?
Time stamping is a method to test that a data set existed before a given time and that none of this data has since been modified.
The time stamp provides an added value to the use of an electronic signature as it by itself does not provide any information about the time that the signature was created, and in the case that the signatory included it, this would have been provided by one of the signing parties, when the recommended method is that the time stamp be provided by a trusted third party.
To associate the data with a specific moment in time it is necessary to use a Time Stamp Authority (TSA) that acts as a trusted third party who testifies as to the existence of the said electronic data at a concrete date and time.
Utilised in any country or region, the time stamp is internationally recognised. It is a widespread standard.