[cryptography] OTR and deniability

James A. Donald jamesd at echeque.com
Mon Jul 18 23:59:50 EDT 2011


On 2011-07-19 9:48 AM, Ian G wrote:
> OTR makes the same error. It takes a very interesting mathematical
> property, and extend it into the hard human world, as if the words carry
> the same meaning. Perhaps, once upon a time, in some TV court room
> drama, someone got away with lying about a document? From this, OTR
> suggests that mathematics can help you deny a transcript? It can't. It
> can certainly muddy the waters, it can certainly give you enough rope to
> hang yourself, but what it can't do is give some veneer of "it didn't
> happen." Not in court, not in the hard world of humans.

OTR gives you the same deniability as a plaintext communicated person to 
person.  "He said ... she said"

No more, and no less.

But that is quite a lot of deniability.




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