Apparatus and method for authenticating network video recorder security

A security authentication method of a network video recorder (NVR) comprising a processor and a communicator, the security authentication method comprising:

• assigning, by the processor, a terminal unique index to each of a plurality of pseudo-random functions included in a pseudo-random function set using terminal information;
• transmitting, by the communicator, a session key having a predetermined expiry time and the pseudo-random function set with the assigned terminal unique index to a terminal;
• calculating, by the processor, a first terminal unique index for authenticating a first message using a predetermined bitstream of the first message received from the terminal;
• selecting, by the processor, a first pseudo-random function for authenticating the first message using the calculated first terminal unique index;
• generating, by the processor, a first independent private key of the terminal for authenticating the first message by inputting the session key and a media access control (MAC) address of the terminal to the first pseudo-random function;
• and
• generating, by the processor, a message authentication code for the first message using the first independent private key and authenticating the first message received from the terminal.