Re: Randomized hashing

2014-12-13 Thread Peter Lebbing
On 28/11/14 11:41, NdK wrote: >> Oh, I agree, I already thought that might close any 'r'-swapping security >> issues, if there would be any; just like you can include the hash >> algorithm in the signature to prevent swapping it out for a weaker one. But >> when >> swapping 'r''s does not actually

Re: Randomized hashing

2014-11-28 Thread Ingo Klöcker
On Thursday 27 November 2014 17:10:08 NdK wrote: > Il 27/11/2014 11:28, Peter Lebbing ha scritto: > > [Resending to list] > > > Perhaps I should add that it takes real research and formal proof to show > > that this randomized hashing doesn't add attack vectors, and I have been > > glossing over

Re: Randomized hashing

2014-11-28 Thread NdK
Il 27/11/2014 14:45, Peter Lebbing ha scritto: On 27/11/14 13:04, NdK wrote: (note that r is not signed, as the rhash scheme suggests and the paper confirms!) "In contrast to a previous proposal by the same authors, the salt r does not need to be included under the signature." I read this

Re: Randomized hashing

2014-11-27 Thread NdK
Il 27/11/2014 11:28, Peter Lebbing ha scritto: [Resending to list] > Perhaps I should add that it takes real research and formal proof to show that > this randomized hashing doesn't add attack vectors, and I have been glossing > over that. But that is because at a glance it looks like such resear

Re: Randomized hashing

2014-11-27 Thread Peter Lebbing
On 27/11/14 13:04, NdK wrote: > (note that r is not signed, as the rhash scheme suggests and the paper > confirms!) > "In contrast to a previous proposal by the same authors, the salt r does not > need to be included under the signature." I read this quite differently. I read it as that 'r' is