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Subject: Re: S/MIME
Part of the key question is whether the MSH has to do any encrypting itself or whether it expects to get the encrypted payload from above. I suspect the latter but the MS spec should be clear on this. PKI-related agreements are in scope for the CPPA team and this is on the very full plate of the security subteam. Regards, Marty ************************************************************************************* Martin W. Sachs IBM T. J. Watson Research Center P. O. B. 704 Yorktown Hts, NY 10598 914-784-7287; IBM tie line 863-7287 Notes address: Martin W Sachs/Watson/IBM Internet address: mwsachs @ us.ibm.com ************************************************************************************* christopher ferris <chris.ferris@east.sun.com>@Sun.COM on 08/15/2001 09:09:57 AM Sent by: Chris.Ferris@Sun.COM To: Dan Weinreb <dlw@exceloncorp.com> cc: ebxml-msg@lists.oasis-open.org Subject: Re: S/MIME Dan Weinreb wrote: > > Chris, in mail some time ago, you said: > > Transient confidentiality may be provided at the transport level using > TLS (SSL), IPSEC or other similar mechanisms which provide for encryption > on the wire. S/MIME may be used to provide for persistent confidentiality > of the payload object(s). > > Is it really OK to use S/MIME in this way? The MS spec doesn't seem > to say anything about S/MIME. > > I have not yet gotten up to speed on S/MIME (so many RFC's, so little > time) but would we have to specify something about how the key > exchange is done, analogously to the initial negotiation in TLS? > There would have to be some way to tell the MSH the avlue of the > private key and corresponding certificate, no? I don't really > know the details, but it seems that if we want to allow S/MIME, > we have to do more than just say "yes, go ahead, use S/MIME"... > > Thanks. > -- Dan Dan, The ebMS spec doesn't say anything about the payload intentionally. The reference to S/MIME means that the payload, not the overall "envelope" can be S/MIME encrypted. As for key exchange, that is clearly outside our scope. How parties negotiate their shared PKI is not our concern in designing the ebMS messaging protocol. That would be in the domain of something like XKMS. Cheers, Chris ---------------------------------------------------------------- To subscribe or unsubscribe from this elist use the subscription manager: <http://lists.oasis-open.org/ob/adm.pl>
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