In-band Key Exchange

Updated 31 Jul 2026

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def
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  sharing a key over the same communication channel that will be used for the main communication itself ("it's on the network") — protect the key with additional encryption, e.g. use asymmetric encryption to deliver a symmetric key
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related
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  Key Exchange
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  Out-of-band Key Exchange
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cards
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  Distinguish in-band from out-of-band key exchange
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    In-band: the key is shared over the same channel being secured (protected with additional encryption); out-of-band: the key is shared over a separate channel entirely (phone, courier, etc.)

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