SECURE COMMUNICATION METHOD AND SYSTEM BASED ON BIT ERROR PROBABILITY

Provided is a method for performing Hybrid Automatic Repeat Request (HARQ) by a data transmitting terminal in a wireless communication system. The terminal transmits data using a specific code word selected from a plurality of code words included in a mother code, calculates a Bit Error Rate (BER) upper bound for a receiving terminal that receives the data, calculates a BER lower bound for another terminal that is able to eavesdrop the data, and performs the HARQ based on whether the BER upper bound is greater than a BER reference level for the receiving terminal and whether a probability of the BER lower bound being less than the BER reference level for the another terminal is less than a predetermined value.