[noise] Rekey

[Rhys Weatherley]

On Thu, Mar 16, 2017 at 5:34 PM, Rhys Weatherley <rhys.weatherley at gmail.com>
wrote:

> The "XOR n" step turns up a lot in key schedule generation for modern
> block ciphers: each key schedule round XOR's in the subkey number.
>

After sending my previous message, I realised that the rekey mechanism *is*
essentially defining a key schedule of subkeys to use with the
CipherState.  F is the round function and K the previous subkey in the
schedule.

Cheers,

Rhys.
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