> one could jailbreak their phone, pull the binary into their computer, decompile it, and inspect it for implementation structures that would be coherent with h

> one could jailbreak their phone, pull the binary into their computer, decompile it, and inspect it for implementation structures that would be coherent with how the two or three most popular encryption algorithms are commonly implemented. There's a much easier way. Turn off your phone's cellular connection, but turn on wifi and connect it to a wifi network you control. Then just sniff the packets.