Hi Peter,

This looks good overall.

Do you need the (e.g., example.com) parentheticals?  They don't seem to add 
anything.

On Fri, Jun 24, 2022, at 07:03, Peter Saint-Andre wrote:
> 1. Deployments in which multiple services handle the same domain name 
> (e.g., foo.example.org) via different protocols (e.g., HTTP and IMAP). 
> In this case an attacker might be able to direct a connecting endpoint 
> to the service offering a protocol that provides weaker security or that 
> is more easily exploitable (see [ALPACA] for more detailed information 
> about this class of attacks). 

The attack in question isn't so much about weaker security (that's true, but a 
little abstract), so I might instead say:

> In this case an attacker might be able to direct a connecting endpoint 
> to the service offering a different protocol and mount a cross-protocol
> attack. In a cross-protocol attack, the client and server believe they are 
> using different protocols, which the attacker might exploit if messages
> sent in one protocol are interpreted as messages in the other protocol
> with undesirable effects (see [ALPACA] for more detailed information
> about this class of attacks).

(Sending to everyone this time...)

Cheers,
Martin

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