Combination encoding method for simultaneously encrypting and channel encoding, transmitting apparatus thereof, combination decoding method for simultaneously channel decoding and decrypting, and receiving apparatus thereof

A combination encoding method comprising:

• performing combination encoding on a source coded message and outputting the combination encoded message, thereby performing encrypting and channel encoding simultaneously;
• and
• modulating the combination encoded message output from the combination encoding unit, and transmitting the modulated message.

A receiving apparatus comprising:

• a demodulator which demodulates a noise-added modulating signal, and outputs a noise-added combination encoded message;
• and
• a combination decoding unit which performs combination decoding on the noise-added combination encoded message output from the demodulator, and outputs a source coded message, thereby simultaneously performing channel decoding and decrypting on the noise-added combination encoded message.

A combination decoding method, comprising:

• demodulating a noise-added modulating signal, and outputting a noise-added combination encoded message;
• and
• performing combination decoding on the noise-added combination encoded message, and outputting a source coded message, thereby simultaneously performing channel decoding and decrypting on the noise-added combination encoded message.