Patent ID: 8495376
Filing Date: 2013-07-23
Classification: H04H,H04L

Abstract:
1. A broadcasting signal receiving apparatus capable of controlling use of a broadcasting program by using a signature included in program information in a system for controlling use of a broadcasting program, comprising: a communicating unit configured to receive a broadcasting signal; an extracting unit configured to extract a broadcasting program and program information from the received broadcasting signal; and a determining unit configured to generate a confirmation signature and determine whether the program information is changed or not from the program information, and determine whether the program information is valid by comparing a signature included in the program information with the confirmation signature; wherein the program information includes program protection information and a program identifier; wherein the program protection information includes permission information for duplication and distribution of a corresponding broadcasting, copyright information, and authentication information; wherein the signature included in the program protection information of the program information is generated by reflecting the program information when the broadcasting signal is initially generated, said signature is used to determine whether each field value includes error or not in the program information; wherein the determining unit is configured to generate an input stream using the program information except the signature, calculate a hash value of the input stream, and generate the confirmation signature from the hash value, public key parameters, and the signature.