How to ensure Secure Communication between peers

[CJ-404]

I want to know how to use TLS or Noice to secure communication. In most places documentation says secure communication can be provide by using ether one of these! but I couldn't find how.

In one topic in libp2p discussion forums, I saw the peers are verified using there Peer IDs so we don't need to explicitly use TLS. ( connection is secured by default). Is that true?

nodeHost, err = libp2p.New(
		libp2p.Identity(prvKey),
		libp2p.ListenAddrs([]multiaddr.Multiaddr(config.ListenAddresses)...),
		// support TLS connections
		libp2p.Security(libp2ptls.ID, libp2ptls.New),
		// support Noise connections
		libp2p.Security(noise.ID, noise.New),
		// support any other default transports (TCP)
		libp2p.DefaultTransports,
		// control too many connections
		libp2p.ConnectionManager(connmgr),
	)

Will creating the host like this apply encryption decryption as well? I can't understand it clearly.
How it know the public key?
Can I use a generated keypair to encrypt and decrypt?

Can someone explain how this works please.

#Noice #TLS #secureCommunication #encryption #decryption #keyPair #libp2p-go

[MarcoPolo]

libp2p.Identity lets you use a pregenerated private key. If none is provided libp2p will generate one automatically.

By default both TLS and Noise are enabled. If a peer supports both, the client will prefer TLS.