What is a timestamp seal?A timestamp seal is a visual mark and guarantee of the original copy and its authenticity, containing information about the time (year, month, date, hour, minute, and second) at which the timestamp was issued. There are four different seals depending on the status of the document. You may choose either a rectangular shape or a circular shape for the seal.
|‘Valid’||The document has not been altered since the timestamp was issued.|
|‘Edited’||The document has been edited since the timestamp was issued (the certificate remains effective). The document has been altered/forged.|
|‘Unverified’||The certificate could not be verified (due to network errors, CRL unavailability, etc.).|
|‘Invalid’||The data contained in the document have been changed since the timestamp was issued (the certificate is no longer effective).The document has been altered/forged.|
The Korean Ministry of Administrative Security adopted its own timestamp seals as of March 2009 and used it through its Governmental Time Stamping Authority (GTSA) on various services, including G4C, electronic bulletin boards, administrative tasks of the Defense Industry Administration, and so forth. The seals affirm either the authenticity, the unverified status, the forged/altered status of the document or the failure to verify its certificate.
|‘Authentic’||The document has not been altered since the timestamp was issued.|
|‘Edited’||The document has been viewed in an environment without a verifying software.|
|‘Unverified’||The document has been altered or edited since its timestamp was issued.|
|‘Invalid’||The certificate is either invalid or cannot be verified.|