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Minutes interim-2020-mls-05: Wed 14:00
minutes-interim-2020-mls-05-202002191400-00

Meeting Minutes Messaging Layer Security (mls) WG
Date and time 2020-02-19 14:00
Title Minutes interim-2020-mls-05: Wed 14:00
State Active
Other versions plain text
Last updated 2020-03-04

minutes-interim-2020-mls-05-202002191400-00
Attendees: Brendan McMillian, Britta Hale, Konrad Kohbrok, Raphael Roberts,
Richard Barnes, and Sean Turner

# Issues / PRs

* When to publish a new version?
    * Agreement to publish once we merge current issues, less PRs #274, #275,
    #219

* PRs #304, #296, #283
    * Sean to send a message to the list soliciting comment
    * Pending comments, goal to merge next week
* #283
    * Concern on the list about [committing authenticated encryption
    algorithm](https://mailarchive.ietf.org/arch/msg/mls/TyIsZsa8Fa38EzlmSdFTndeRHTE/)
        * There are some countermeasures available:
            * Signatures
            * Derived vs. generated keys
            * Sender data encryption
            * Agreement on key schedule and inclusion of key indicators in AAD
        * Could this be “field graded” if we find an issue later?
        * Generally folks feel OK without committing scheme
    * How does this work in a federated environment?
        * Agreement that all members have to support a new scheme in any case
        * Raphael: Client upgrade cycle is different from server upgrade cycle
        * Fundamental issue is asymmetry between generating and accepting
        signatures * Concern about, e.g., country mandating use of an
        export-grade cipher
            * With individual algorithms, could have some use, some not
            * Messages could be forged by those using weak algorithms, but not
            those using strong

# AOB

* None.