CA lock is an electronic seal. 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.
Long before the promulgation and implementation of China's Electronic Signature Law, electronic seals appeared. In the middle and late 1990s, as the traditional office mode gradually changed to the information office mode, the circulation form of paper documents also changed to the circulation form of electronic documents.