A framework Chunghwa Telecom ecommerce Public Key Infrastructure (ePKI) was set up by Chunghwa Telecom (CHT). Its purpose is to issuing certificates and strengthen electronic commerce infrastructure.
It is the Hierarchy PKI based on ITU-T X.509 standard, within the framework, an ePKI Root Certification Authority (eCA) acts as the trust anchor and issues certificates to subordinate certification authority (CA). There is one subordinate certification authority, Public CA (PublicCA), issues certificates to the general public including natural persons, organizations, equipment, and application software.