System for providing end-to-end security service using portable security unit based on intelligent home network

A system for providing an end-to-end security service using a portable security unit (PSU) based on an intelligent home network, the system comprising:

• a PSU connected to a home network;
• a user terminal configured to access the PSU using a quick response (QR) code and upload PSU information of the PSU and user information and connected to the Internet according to a security policy prestored in the PSU;
• and
• a security-service-providing server comprising a registration part configured to register, when the user terminal accesses the security-service-providing server using the QR code and uploads the PSU information and the user information, the user terminal, the PSU, the user information, and the PSU information, a security connection part configured to connect the user terminal to the Internet through the PSU according to the prestored security policy when the user terminal attempts to access the Internet, and a threat prevention part configured to block access by a threatening terminal which has not been authenticated by the PSU, through the PSU,
• wherein the PSU information includes a media access control (MAC) address and a PSU authentication key.