On Mar 6, 2013, at 3:32 PM, Scharf, Michael (Michael) wrote:

> For what it is worth, the exact phrasing in -14 confuses me: "An ALTO Server 
> MUST support SSL/TLS [RFC5246] to implement server and/or client 
> authentication, encryption, and/or integrity protection."  I could read this 
> in a way that the ALTO server MUST announce all services on HTTPS URIs, and 
> this is certainly not what we want. (And, having "and/or" in a MUST statement 
> might not be perfect.)

Btw, client authentication in TLS is a bit more difficult (from an operational 
point of view) since you have to issue certificates to clients. If you on the 
other hand want a different credential to be used (for example shared secrets) 
then you will have to say that by choosing a different ciphersuite. The 
sentence above seems to indicate that you may want to want to support client 
authentication in TLS as well. 

A separate question is whether you actually use TLS. 
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