key exchange
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6 Terms
how to share an encryption key across an insecure medium without physically transferring the key
out of band key exchange and in band key exchange
out of band key exchange
where you send the key by telephone, courier or in-person
in band key exchange
on the network
protect the key with additional encryption
use asymmetric encryption to deliver a symmetric key
session key
client encrypts a random symmetric key with a servers public key
the server decrypts this shared key and uses it to encrypt data
session key characteristics
need to be changed often (ephemeral keys)
need to be unpredictable
can you create symmetric keys from asymmetric keys
yes called key exchange algorithms
