WebRTC's data channels have a message size limitation. But where does this limitation come from? I've read through most of Firefox's and Chromium's data channel code. In this article, I'll show you my results and give some recommendation what you can do to reliably work around this issue.

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In my bachelor thesis, I'm going through the WebRTC protocol, in particular its weakest link - the Signalling Channel. This work presents a solution that uses the Networking and Cryptography library (NaCl) to provide a secure implementation of the Signalling Channel called SaltyRTC.

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