How to use «Timestamping service»

If you haven't read Introduction, read it now.

How to get the timestamp

To get timestamp use this form. You will be asked to download pgp file, which introduces timestamp. The downloaded document contains the necessary attributes.

At the same time the system saves the timestamp available to anyone. The reserve is needed to form the connection in series of timestamps.

How to check timestamp

PGP key, which gets signs of timestamp, is kept on the server. To come down the risk of his falsification the following plan is used:

• There is a master key, kept in complete secret. This key is used only for marking service keys.
• Service key is used for marking timestamps.
• So, as far as service keys are regularly changed the risk of falsification comes down. The series of timestamps decrease and will be discredit in case of service key falsification.

Service key is a PGP key used for signing time marks and is kept on the server.

Master key is a PGP key used for signing service keys and kept in complete secret.

Thus the validity of timestamp is checked by open part of the service key, and the validity of service key is checked by open part of master key.

For service key search use PGP-keys storage.

Why  can I trust service

As it has been already mentioned in introduction, timestamps forms series of stamps in which every subsequent stamp contains the evidence of being given after the previous timestamp. (stamp contains the hash of the previous one). Thus the risk of falsification of timestamp comes down. If the service gives a timestamp with hind-sight, it can be detected.

The use of connecting time markers allows to control the service.

You can periodically make your timestamps. Then you will be absolutely sure in veracity of any stamp, which is included in timestamp series between your control timestamps.

Using Notarial journal you can download stamp series.

Note:
While calculating timestamp hash is counted not from all pgp file, but from necessary attributes only.