I've heard this called "rekeying". The amount of data that's safe to
authenticate and encrypt is usually called the "safety margin".

Chris P.

On Thu, Jun 24, 2021 at 10:32 AM Salz, Rich <rsalz=
40akamai....@dmarc.ietf.org> wrote:

> I’m blanking on a term and web searches turn up too much useless info.
>
>
>
> What is it called when we have to start using a new symmetric key because
> we’ve encrypted too much data with the old one?  Key exhaustion fits, but
> probably isn’t it.
>
>
>
>
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