Some people seem to be unclear as to what mpotr blockers are.
Here's a list of the crucial blockers:
A specification, that details:
1. Protocol for rolling chat sessions [1]
2. Protocol for Identity verification
3. Deciding how Authentication looks in the group context
4. Decide set of chat participants. (proposal [2])
5. How to recover from error states (proposal [3])
6. Message ordering (to mitigate replays)
a. Proposal: Old Blue implementation [4]
7. Deniable Signature Key Exchange algo [5]
2, 3, are AFAIK undiscussed and need proposals
1, 4, and 5 have proposals that need to be fleshed out in a protocol
document.
6 and 7 require implementation of new algorithms and then distillation
into a mpotr protocol document.
[1]: http://lists.cypherpunks.ca/pipermail/otr-dev/2012-July/001334.html
[2]: http://lists.cypherpunks.ca/pipermail/otr-dev/2012-October/001481.html
[3]: http://lists.cypherpunks.ca/pipermail/otr-dev/2012-October/001480.html
[4]: http://matt.singlethink.net/projects/mpotr/oldblue-draft.pdf
[5]: http://matt.singlethink.net/projects/mpotr/oldblue-draft.pdf
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