IdenTrust Timestamping Authority Server is a service that binds the digital certificate used to sign a digital file with the data being signed, creating a unique sequence of characters or encoded information known as hash, and also identifies when a certain event has occurred. The result is a trusted accurate digital date and time stamp seal embedded within the digital file that contains X.509 digital signatures. Any change in the timestamped file will break the timestamp seal alerting the user that the file is no longer in its original state. //

Users who wish to add timestamping to PDF files that are signed with IdenTrust personal or business digital certificates must add 'http://timestamp.identrust.com' as the Timestamping Server to their local Adobe® Acrobat or Adobe® Reader configuration. Our article How to Add IdenTrust Timestamping Authority Server to Adobe will guide you through this process.

Users who wish to add IdenTrust Timestamping Authority Server to Microsoft® MS-Office® digitally signed documents can do it following the instructions in our article Apply IdenTrust Timestamping Authority to Microsoft Office Digitally Signed Documents.