Abstract: The present invention relates to an electronic document communication system and to an electronic document communication method, which can construct an electronic document communication system for providing not only enterprise/institutions with reliability, but also individuals and small companies.

Abstract: The present invention relates to an electronic document distribution system and to an electronic document distribution method, which can construct an electronic document distribution system for providing not only enterprise/institutions with reliability, but also individuals and small companies.

Abstract: The present invention relates to creating, distributing, and storing a distribution certificate in an electronic document distribution system which is based on a public electronic address, and particularly to a method for creating/issuing an electronic document distribution certificate, a method for verifying an electronic document distribution certificate, and a system for distributing an electronic document, which makes it possible to provide a transparent and efficient issuing service and to raise the distribution reliability of electronic documents due to the security of the compatibility of the certificate.

Abstract: Provided are an electronic document repository system which guarantees authenticity of electronic document and issues certificates and methods of registering, reading, issuing, and transferring electronic documents in the system, and a method of issuing certificates in the system. The electronic document repository system includes an authentication module, a registration module, a reading module, an issuing module, and a certification module.