Symmetric key
One shared secret used to both encrypt and decrypt. Fast (AES-128 on AES-NI runs at multiple GB/s) but solves nothing if the two parties have no prior secure channel to exchange the key.
One shared secret used to both encrypt and decrypt. Fast (AES-128 on AES-NI runs at multiple GB/s) but solves nothing if the two parties have no prior secure channel to exchange the key.
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