| Summary: | In World War 2, in order to ensure a secure communication; voice signal was simply added with noises to prevent enemies from listening into confidential information. Nowadays, confidential information being sent through the communication medium is a primary concern as data will travel through the insecure medium. Hence, various methods had been developed throughout the years to protect data sent from unauthorized user. Most methods have it pros and cons. Some methods make the data sent to be more secure but at slower speed and vice versa. The scrambler presented here will consist of few techniques used for studying, analyzing and comparing. Each technique is coded using MATLAB and is implemented onto the user interface and it will be simulated with different parameters for observation. The results of the presented techniques will validate on how secure, reliable, and efficient in transmitting through audio communication channel as well as how well the audio can be recovered.
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