'KSignTSA (Time Stamp Authority)' will record the present time data on specific information to approve such existence of the corresponding information at selected time.'KSignTSA' issues tokens to approve the point of time, provides signature and security related libraries, handles requests to approve the point of time and manages data for issued timestamp tokens.

As the e-business become popular and widely used, the need for proving the exact time when a transaction has made become essential importance. for example, the time and data of a transaction has made, who has made the transaction, what was the content of the transaction. Although digital signature is providing user authentication and integrity for e-business transactions, it just simply does not have function to prove the exact time and date a transaction made.
Proving the time and date a transaction took place is the essential matters for online stock trade, online tax payment, online bidding, etc where the point of time for transaction means critical. Time stamping (process of proving the time and date of transaction made) on the data with digital signature will prevent the claims of the false time and date. Currently, International Organization for Standardization has established RFC3131 for timestamp.
KSignTSA has developed under deploying the international standard to ensure interoperability and reliability.