One thing that always comes to mind when I read these kinds of threads is no one ever recommends 'civic engagement' or 'civil participation'. So even if you could come up with a way of 'breaking' the encryption algorithm (the odds are very long against that), you would be in violation of federal law and could spend up to five years in prison. The federal government has passed a law (18 US Code 2511) that prohibits the interception of encrypted radio communications. The purpose of encrypting radio traffic is to keep the communications private so that 'bad guys' can't listen to the 'good guys'. While there are several types of encryption processes in radio use, probably the most common is AES or Advanced Encryption Standard. Receiving radios have to have an algorithm or key on how the transmitting radio 'scrambled' that digital stream. However a transmitting radio using encryption will 'scramble' the 0's and 1's around. Scanners will re-convert these 0's and 1's back into a voice signal. As you probably know, P25 is where a voice signal is transformed into digital, which is a series of 0's and 1's.
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