Home구분자Timestamp구분자Timestamp Information

The Concept of Timestamp

A timestamp is an international standard technology is based on public key infrastructures (PKI) that enable the verification of the time at which a given electronic document was created and whether it is authentic or not. As such, a timestamp allows us to verify that a given electronic document had existed at some point, and whether its data have not been altered or forged.

Because a timestamp is something that a trusted third party (TTP) grants to an electronic document to validate the time-related data related to it, it cannot be re-issued past the time at which the document was created or updated.

*A timestamp cannot be issued by an unauthorized, random organization not adhering to the international standard. (Such organizations do not verify time, but merely replicate satellite time.)

Timestamp (TS) vs. e-Signature

Timestamp e-Signature
Objectives: -Verifying the existence of a document at a given time. (when)
-Ensuring the document’s authenticity. (what)
-Verifying the author (who).
-Confirming the document’s authenticity (what).
Applied Technology -e-Signature made using the codeword-protected key to the GTSA server.
-Suitable for verifying the existence of a document and ensuring its authenticity.
-Verifying the author (who).
-Confirming the document’s authenticity (what).
Characteristics -Independent of the server system.
-The time-stamped document exists and is managed in the user’s computer.
-Visual information is included as part of the document (which is kept intact in its original form).
-Timestamp is kept intact for a long time (RFC5126).
-Subjugated to the server system.
-The signed document exists separately from the e-signature information (or is managed in the form of a third file).
-More complicated and burdensome to use because of the need to re-issue.

How to Manage Timestamp Tokens

Embedded Tokens Attached Tokens Separate Tokens Meta-Data Tokens
How to Save Saved in a certain part of the file in a codified form.

Saved as an attachment to the file.

New file format
Saved and managed independent of the file.

Saved as an item in the database.

Program Type Plug-in Separate viewer Separate viewer Depends on the working system.
Advantages No change is made to the existing system since there is no change in the original file format. The applied software is user-friendly.
Allows easy visual identification of time-stamped files.
Can be applied to any document regardless of what program was used to create it.
Permits various file formats.
It is easy to use and process time-stamp-related information.
Permits various file formats.
It is easy to apply to the working system.
Permits various file formats.
Disadvantages Documents in formats other than HWP, PDF, or MS Office have to be converted into PDF format. Additional responses required depending on the version of the applied software.
Requires change in the existing system when converted to another file format.

Overall improvement in the quality and usage of viewer programs required.

More vulnerable to security breaches (modifications in the token information, etc.)
No authentification or verification possible when token files are lost.

Requires change in the system when there are two files that need to be connected.

Overall improvement in the quality and usage of viewer programs required.
Requires connection to the working system at all times.
More vulnerable to security breaches (by system administrators, etc.).