Deniability is a fictitious property that has, to my knowledge, never had any bearing on a real world case amounting more than overblown mentions-in-passing.
Considering that the vast majority of problems in cryptography software today stem from errors in software implementation, and not from the lack of miscellaneous and academic properties such as deniability, I'd consider that engineers focusing on deniability instead of proven-secure software implementations don't exactly know what's salient when it comes to pushing software. (My tone is harsher than usual; this is because I can't believe people still bother wasting time on deniability when we have problems implementing confidentiality and authentication correctly - far more basic properties.) NK -----Original Message----- From: Messaging [mailto:messaging-boun...@moderncrypto.org] On Behalf Of Jacob Appelbaum Sent: December 10, 2014 2:57 PM To: messaging Subject: Re: [messaging] Value of deniability On 12/10/14, Eleanor Saitta <e...@dymaxion.org> wrote: > -----BEGIN PGP SIGNED MESSAGE----- > Hash: SHA256 > > On 2014.12.10 13.56, Mike Hearn wrote: >> I would like to hear opinions on the value of deniability in OTR like >> protocols. >> >> From a privacy perspective the rationale is fairly clear. > > Has anyone ever seen a case where cryptographic deniability was > accepted by a judge? As far as I can tell, its legal value is a > fiction from the cryptographic community. > Yes, I think so. The lack of signatures ensures that a text log is just that - a text file without cryptographic assurances. It is subject to tampering. If I recall correctly, this issue came up a bit in Anakata's recent trials. Furthermore, the inverse is accepted routinely - digital signature laws in some US states. Washington State in the United States seems to be an example. If you have a PGP signed email, I'd expect some binding laws to apply for statements made in the signed portion of the text. Without a signature, I don't it will fall under the same digital signature statutes. Repudiation and non-Repudiation are real properties that they have contextual value. All the best, Jacob _______________________________________________ Messaging mailing list Messaging@moderncrypto.org https://moderncrypto.org/mailman/listinfo/messaging _______________________________________________ Messaging mailing list Messaging@moderncrypto.org https://moderncrypto.org/mailman/listinfo/messaging
