[cryptography] OTR and deniability

Jeffrey Walton noloader at gmail.com
Fri Jul 15 14:19:00 EDT 2011

On Fri, Jul 15, 2011 at 12:45 PM, Marsh Ray <marsh at extendedsubset.com> wrote:
> On 07/14/2011 01:59 PM, Steven Bellovin wrote:
>> did the first party hack into the second party's computer and plant
>> the log file?  had someone else hacked into it and used it to talk
>> with the first party? -- but that's also outside the crypto
>> protocol.
>> Put another way, the goal in a trial is not a mathematical proof,
>> it's proof to a certain standard of evidence, based on many different
>> pieces of data.  Life isn't a cryptographic protocol.
> The interesting thing in this case though is that the person providing the
> plaintext log file is:
> a) a convicted felon
> b) working for the investigators/prosecutors (since before the purported log
> file's creation?)
> c) himself skilled in hacking
Agreed (I'm glad someone else said it).

> I haven't heard anything about any other evidence that may exist, but just a
> text file by itself (or perhaps even the informant's computer as a whole)
> doesn't seem particularly credible to me.
I'm not sure we will see any evidence. I would expect this case to
stay under the purview of the military, where folks (soldiers?) have
fewer rights.


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