Adobe Acrobat Timestamp Servers

• What is the Adobe® Acrobat Timestamp Server support?       

Here's an example PDF file that you can download to view and verify on your computer with Adobe Reader. Summary: The content of this PDF file has been notarized by DigiStamp via an electronic timestamp. This is evidence that this content and your signature existed at a point-in-time. You can view this evidence using Adobe Reader on your computer. This file's content cannot be altered without the tampering being detected by the Acrobat Reader software.

Starting with Acrobat version 7, the Acrobat products include support for timestamping your digital signature. The Acrobat products with timestamp support are Professional, Standard and Reader (with Reader Extensions enabled files) The purpose of timestamping a digital signature was defined in the digital signature standards. In summary, when a timestamp is added to your signature then you have an external witness to when you signed the document (more information is here). The process of adding a timestamp to your signature does not send your document outside your computer. Timestamping does not compromise the privacy of your document - only a "SHA-1" hash of the signature is sent to DigiStamp to create the timestamp (more information is here).      

Adobe provides instructions about how to configure timestamps in Adobe Reader 8 at this link (alternatively, this link). Or, we provide instructions below.      

For further information on the Acrobat products contact Adobe Systems (http://www.Adobe.com).    

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Please note that these instructions are for production accounts.  Test accounts will need to use certificates and URLs for test accounts.

Setup Acrobat 9 to use DigiStamp timestamp servers

Specify the DigiStamp servers:    Primary server: http://tsa1.digistamp.com/TSA   Backup server if the primary is unavailable: http://tsa2.digistamp.com/TSA           The beginning text "http://" is required, or Acrobat will later respond with: "Unsupported transport protocol" You will need to create an account at DigiStamp. Click here for Account Setup. If Acrobat responds with error: "Transport authorization failure" then:  - your account number is not correct (even a space at the end causes this) - the password is entered wrong - or your account has no balance If Acrobat responds with error: "Error encountered while BER decoding" or  "Unspecified transport error" then check that the server URL above is entered correctly as: http://tsa1.digistamp.com/tsa

Setup Acrobat X to use DigiStamp timestamp servers

A video version of these instructions is in a YouTube video available here.

Specify the DigiStamp servers:    Primary server: http://tsa1.digistamp.com/TSA   Backup server if the primary is unavailable: http://tsa2.digistamp.com/TSA           The beginning text "http://" is required, or Acrobat will later respond with: "Unsupported transport protocol" You will need to create an account at DigiStamp. Click here for Account Setup. If Acrobat responds with error: "Transport authorization failure" then:  - your account number is not correct (even a space at the end causes this) - the password is entered wrong - or your account has no balance If Acrobat responds with error: "Error encountered while BER decoding" or  "Unspecified transport error" then check that the server URL above is entered correctly as: http://tsa1.digistamp.com/tsa