Hi all,

I have a general comment about draft-penno-alto-protocol-03.txt after reading 
it and some more  comments:

The draft tries to incorporates now all other in parallel existing approaches 
(i.e., P4P, ALTO Info Export, Query/Response, ATTP, and Proxidor) but without 
any major discussion about the usefulness of this. All approaches have their 
pros and cons, and they are quite different ways of tackling with ALTO. The 
discussion about the various proposal just started and IMHO it was not clear 
which of the many does actually address the general challenges of ALTO. 

This means (taking some as example):
- P4P addresses the challenges out of the P4P project, which the specific 
mechanics of Comcast and Pando. I do see the value of P4P, but it is one case 
how you could do it, i.e., I'm not saying that this is bad. I like the approach 
very much. However, I do not (yet) see the evidence that P4P works for 
tracker-less P2P and in other deployments, even though most of the people 
believe this. 

- Proxidor has a different view IMHO to ALTO, i.e., very operator driven. By 
solely integrating this, there might be a loss of functionality, e.g., Proxidor 
works also tracker-less p2p.

- ATTP was a bit orthogonal to the other approaches and less to do with ALTO 
(even though it is related).


Second, I couldn't really find out what parts are from the various other 
incorporated protocols, other than this looks as an evolved P4P proposal 
without explicitly saying what the benefits of the merger from the various 
protocols are.

The protocol claims to "At the same time, it introduces additional techniques  
to address potential scalability and privacy issues." (first paragraph, 2nd 
sentence of Section 2). However, I'm clueless after reading what these 
techniques are and why they're not discussed in the security section (privacy 
as term pops up in this sentence, and nowhere else).

Thanks,

  Martin


[email protected]

NEC Laboratories Europe - Network Research Division
NEC Europe Limited | Registered Office: NEC House, 1 Victoria Road, London W3 
6BL | Registered in England 2832014 

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