This paper presents a speech-hiding algorithm-Analysis-By-Synthesis Energy Ratio Adjust Algorithm (AERAA) that can be deployed on Global System for Mobile Communications (GSM).The algorithm is based on the technique of Analysis-By-Synthesis (ABS) and can adjust adaptively the strength of the security information component according to public speech.The hiding capacity of the algorithm is 50 bits per second.After a lot of experiments

it is proved that this algorithm has strong robustness to many attacks such as Regular Pulse Excited-Long Term Prediction coding (RPE-LTP coding) on GSM

Adaptive Differential Pulse Code Modulation (ADPCM) compression and most of filters.The average Signal Noise Ratio (SNR) of the middle speech is above 37db

therefore the imperceptibility can be ensured.Moreover the algorithm is based on blind-detection

it is simple and effective.