Information encoding is the process of putting information into a computer to store and process it. The information must be converted into a series of bits. When connecting and sharing data with information systems and databases, encryption is a mandatory regulation to identify, distinguish and determine information. In archiving, encryption is regulated at many levels: agency code, archive font code, record code, document code, document information code. Currently, competent agencies have issued many documents to guide this content
however, due to many different reasons, encryption has not been implemented or has not been implemented uniformly.