IMO, a CA can describe in their CPS what "misuse" is, and the BRs should allow CAs to revoke certificates that are "misused" according to their respective CPSes. The CPS is a contract, in essence, and it's up to the Applicant to decide whether they like it or not. If a CPS provides for revocation of the SSL certificate in case it is used on a web site that (just for example, I am not suggesting anything to anyone) sells weapons ... the Applicant may not say they did not know, and I do not think that this need to be expressly covered in the BR (nor should it be forbidden).

Il 08/06/2018 11:52, Ryan Sleevi via Public ha scritto:
I'm not sure. Misuse defines what it's not, while allowing for a whole host of things which it is. If it's defined as the antonym, and we defined that particular function or use, then that would forbid any uses not covered - probably not what is intended.

On Fri, Jun 8, 2018 at 5:36 AM, Moudrick M. Dadashov via Public <[email protected] <mailto:[email protected]>> wrote:

    Would it help if we define its antonym e.g. "designed for or
    capable of a particular function or use"?

    Thanks,
    M.D.



    On 2018-06-07 17:32, Ryan Sleevi via Public wrote:

        On Thu, Jun 7, 2018 at 10:24 AM, Geoff Keating
        <[email protected] <mailto:[email protected]>>
        wrote:

                On Jun 7, 2018, at 1:40 PM, Ryan Sleevi via Public

            <[email protected] <mailto:[email protected]>> wrote:


                In the pursuit of a definition, we tried to work
                backwards - what

            are situations we think are misuse.

            The dictionary definition of ‘misuse’ is:

            use (something) in the wrong way or for the wrong purpose


        I'm not sure how this helps us move forward - were you
        suggesting that
        4.9.1.1 would read:

        4. The CA obtains evidence that the Certificate was used for
        the wrong
        way or for the wrong purpose;

        With such a definition, this supposes there's a right way or right
        purpose.

        1) Do you believe the right purpose is wholly reflecting in the
        Subscriber Agreement or Terms of Use?
        2) Do you believe the right way is wholly reflected in the
        definition
        I provided (from 1.1), that the right way is "used for
        authenticating
        servers accessible through the Internet"


                Another suggestion was that it involved scenarios
                where the

            Subscriber private key was in an HSM, and itself was not
            compromised, but had signed things it was not expected to.
            This
            wasn't elaborated on further - so I'm uncertain if this
            meant things
            other than the TLS handshake transcript - but this is
            already met by
            our definition of Key Compromise in 1.6.1, that is:

                ""A Private Key is said to be compromised if its value
                has been

            disclosed to an

                    unauthorized person, an unauthorized person has
                had access

            to it, or there exists a

                    practical technique by which an unauthorized
                person may

            discover its value. “""

            If a key is in a HSM and not exportable, then its value is not
            disclosed, nor does an unauthorized person have access *to the
            key*.  Dictionary definition of ‘access’ is 'obtain, examine,
            or retrieve’ none of which apply here.  So it is not
            covered by
            Key Compromise.


        I'm not sure - what are you providing an example of? I would think
        that, say, generating a signed message that was not
        authorized, then
        "an unauthorized person has access to it". Perhaps you could
        help me
        understand this misuse - is it that the signature was
        authorized and
        was directed to sign something that they didn't want to do?
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