Ca lock is a small tool similar to USB flash drive needed by electronic bidding system. The tender can be encrypted, inserted into the computer and uploaded.
Its management and use conform to the habit and experience of entity seal, and its stamped electronic documents have the same appearance, the same effect and similar uses as the paper documents stamped with entity seal.
Only by using electronic signature technology to verify the authenticity and validity of electronic contracts can electronic seals be displayed normally. It is necessary to use electronic signature technology to protect both electronic data and electronic seals, and avoid tampering with electronic seals and electronic contract documents stamped with electronic seals.