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Secure communication between client and server. The captured
data might go through different interfaces than the one used
Instead of rolling a custom protocol the idea is to adopt TLS
1.2 to achieve client authentication and ciphering.
Neither the client nor the server should block during the key
exchange. Most TLS implementations do block and this is a problem
for a single threaded server. Ideally the same library is used
in the client and the server.
In practice libraries might block during the handshake and this
is a big deal for the server (other clients block).