Session Key is a relatively short-lived and often single-use Symmetric Key
used for encryption
in one communication session
A Session Key should be strong enough to remain secure for the lifespan of the session.
When Session Key are exchanged, they are generally protected with Asymmetric Keys so that Session Keys remain Confidential.
Session Key can be derived from a Hash Function.
Asymmetric Key Cryptography is too slow for many purposes, and all secret key algorithms require that the key is securely distributed. By using an Asymmetric Keys to encrypt the Session Key for another, faster, Symmetric Key overall performance can be improved considerably.
Alternative Names for Session Key#
The terms MAC key
, Session Key, and often Symmetric Key
are typically used interchangeably and refer to some form of cryptographic keying material
established between the client
Session Key in EDirectory
) is used to securely send data
from a client
to a server
or vice versa, NICISDI
provides the SASDFM keys
which serve as a NICISDI
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