On Mon, Aug 11, 2014 at 6:00 PM, Viktor Dukhovni
<openssl-us...@dukhovni.org> wrote:
> No, generally you re-use previously generated keys, otherwise you
> lose much of the advantage of "stateless resumption".  However,
> along with each keyset you associated some suitable TTL, and you
> stop signing new sessions with a keyset that is expiring, while
> keeping it in memory long enough to decrypt any previously signed
> sessions.
>
> So each keyset lives in memory for 2 * encryption-TTL, where the
> encryption-TTL is also the maximum session lifetime, but is only
> used to encrypt new sessions for 1 * encryption-TTL.  This means
> you only have 2 keysets in memory, the current and previous.
>

I see, thanks.
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