On 02/17/2016 01:03 PM, =JeffH wrote:
> In -tls13-11 section 7.2 [1] there is this..
>
>   7.2.  Updating Traffic Keys and IVs
>
>      Once the handshake is complete, ...
>
>     [...]
>
>      Once traffic_secret_N+1 and its associated traffic keys have been
>      computed, implementations SHOULD delete traffic_secret_N.  Once the
>      directional keys are no longer needed, they SHOULD be deleted as
>      well.
>
>
> ..and it isn't clear to me what is meant by "directional keys" in the
> paragraph above (that is the only occurance of the term I find)?
>
> is the term meant as a forward reference to this table in S 7.3 and thus
> to the notion of "client write key" and "server write key" ?
>

Yes.

-Ben

>                  +------------------+--------------------+
>                  | Key Type         | Purpose            |
>                  +------------------+--------------------+
>                  | Client Write Key | "client write key" |
>                  |                  |                    |
>                  | Server Write Key | "server write key" |
>                                   [...]
>                  +------------------+--------------------+
>
>
> thx,
>
> =JeffH
>
> [1] https://tools.ietf.org/html/draft-ietf-tls-tls13-11#section-7.2
>
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