Re: [tor-dev] Padding prop224 REND1 cells to blend them with legacy cells

2017-09-19 Thread teor
> On 20 Sep 2017, at 00:44, George Kadianakis wrote: > > Legacy RENDEZVOUS1 cells are bigger than the prop224 ones. The prop224 > spec suggests we pad the new cells so that they look similar in size to > the legacy ones. > > ... > > The suggestion is to pad the prop224 cells to 168 bytes using

Re: [tor-dev] Padding prop224 REND1 cells to blend them with legacy cells

2017-09-19 Thread Ian Goldberg
On Tue, Sep 19, 2017 at 08:29:41PM -0400, Nick Mathewson wrote: > > Is your goal that someone who sees the *plaintext* of that cell won't be > > able to tell if it's a legacy RENDEZVOUS1 cell or a new one? If so, > > life is a bit complicated, since the g^y field will always be in the > > prime-or

Re: [tor-dev] Padding prop224 REND1 cells to blend them with legacy cells

2017-09-19 Thread Nick Mathewson
On Tue, Sep 19, 2017 at 8:13 PM, Ian Goldberg wrote: > Resending from a subscribed address. > > On Tue, Sep 19, 2017 at 05:44:46PM +0300, George Kadianakis wrote: >> Hello Ian, (and other cryptographers on the list) >> >> here is a quick question which you might be able to answer super fast: >> >>

Re: [tor-dev] Padding prop224 REND1 cells to blend them with legacy cells

2017-09-19 Thread Ian Goldberg
Resending from a subscribed address. On Tue, Sep 19, 2017 at 05:44:46PM +0300, George Kadianakis wrote: > Hello Ian, (and other cryptographers on the list) > > here is a quick question which you might be able to answer super fast: > > Legacy RENDEZVOUS1 cells are bigger than the prop224 ones. Th

Re: [tor-dev] tor-dev Digest, Vol 80, Issue 10

2017-09-19 Thread flipchan
I emailed someone that runned an out of date version of tor yesterday and maybe it's more efficient to have an auto mailer to remind ppl to update On September 19, 2017 2:00:09 PM GMT+02:00, tor-dev-requ...@lists.torproject.org wrote: >Send tor-dev mailing list submissions to > tor-dev@lis

[tor-dev] Padding prop224 REND1 cells to blend them with legacy cells

2017-09-19 Thread George Kadianakis
Hello Ian, (and other cryptographers on the list) here is a quick question which you might be able to answer super fast: Legacy RENDEZVOUS1 cells are bigger than the prop224 ones. The prop224 spec suggests we pad the new cells so that they look similar in size to the legacy ones. Here is how the