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Client ~$ ncat --ssl localhost 9876
Change localhost to the correct ip address.
client$ while true; do read -n30 ui; echo $ui |openssl enc -aes-256-cbc -a -k PaSSw ; done | nc localhost 8877 | while read so; do decoded_so=`echo "$so"| openssl enc -d -a -aes-256-cbc -k PaSSw`; echo -e "Incoming: $decoded_so"; done
This will establish a simple encrypted chat with AES-256-CBC using netcat and openssl only.