Client/Server GSM voice encryption

This project received 11 bids from talented freelancers with an average bid price of $853 USD.

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$250 - $750 USD
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Project Description

We are looking for an Android client that permit type a text message, encript it and send over gsm call. The call will be received by Asterisk SIP server, we need in the server side a software that can decript the audio encripted before in the Android client and extract the text was sent originally.

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