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Re: [TLS] What's it called

Hannes Tschofenig <Hannes.Tschofenig@arm.com> Fri, 25 June 2021 06:10 UTC

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From: Hannes Tschofenig <Hannes.Tschofenig@arm.com>
To: Tim Bray <tbray@textuality.com>, Paterson Kenneth <kenny.paterson@inf.ethz.ch>
CC: "tls@ietf.org" <tls@ietf.org>, "Salz, Rich" <rsalz=40akamai.com@dmarc.ietf.org>
Thread-Topic: [TLS] What's it called
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Archived-At: <https://mailarchive.ietf.org/arch/msg/tls/76eDR4sKfagGD4cHr5f6w_rNrlw>
Subject: Re: [TLS] What's it called
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Depends on the algorithm and its parameters. Here is a recent document talking about AES algorithms limits.
https://datatracker.ietf.org/doc/html/draft-irtf-cfrg-aead-limits-02

From: TLS <tls-bounces@ietf.org> On Behalf Of Tim Bray
Sent: Thursday, June 24, 2021 9:13 PM
To: Paterson Kenneth <kenny.paterson@inf.ethz.ch>
Cc: tls@ietf.org; Salz, Rich <rsalz=40akamai.com@dmarc.ietf.org>
Subject: Re: [TLS] What's it called

How much data is too much?

On Thu, Jun 24, 2021 at 12:02 PM Paterson Kenneth <kenny.paterson@inf.ethz.ch<mailto:kenny.paterson@inf.ethz.ch>> wrote:
Hi Rich,

We speak of reaching data limits, and the process of changing the key has many names, e.g. key rotation, key renewal, key refreshing, key updating.

Any of those ring a bell?

Cheers

Kenny


From: TLS <tls-bounces@ietf.org<mailto:tls-bounces@ietf.org>> on behalf of "Salz, Rich" <rsalz=40akamai.com@dmarc.ietf.org<mailto:40akamai.com@dmarc.ietf.org>>
Date: Thursday, 24 June 2021 at 19:32
To: "tls@ietf.org<mailto:tls@ietf.org>" <tls@ietf.org<mailto:tls@ietf.org>>
Subject: [TLS] What's it called

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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