Provided is a method and apparatus for managing authentication information in a home network, the method includes the operation of receiving Product Identification Number (PIN) information that is externally input and is an identifier allocated to a control device or a controlled device at the time of manufacture; and transmitting authentication information to the control device or the controlled device via a Secure Authenticated Channel (SAC) generated by using a Transport Layer Security Pre-Shared Key ciphersuites (TLS-PSK) protocol implemented by using the PIN information, wherein the authentication information is necessary for a user to control the controlled device via the control device.