This is merely a historical archive of years 2008-2021, before the migration to mailman3.
A maintained and still updated list archive can be found at https://lists.osmocom.org/hyperkitty/list/op25-dev@lists.osmocom.org/.
Steve Glass stevie.glass@gmail.com [op25-dev] op25-dev at yahoogroups.comI've not much time these days but I'd be happy to comment and provide pointers. Your suggestion sounds good - I'm sure that Max would accept any patches that would do what you suggest. On 6 October 2015 at 12:12, Joseph Cardani jcardani at verizon.net [op25-dev] < op25-dev at yahoogroups.com> wrote: > > > Hi All, > > I would like to resurrect this RC4 thread. > > Has there been any progress on this? > > I believe that a full key variable brute force retrieval within OP25 would > raise way to many eyebrows. I believe a better idea would be two fold: > > First modify OP25 to decrypt ADP, DES-OFB, AES256 etc with a known key. I > believe the code was discussed by Steve and Matt. So if you know the key > variable, simply enter it and decrypt away. > > Second, modify OP25 to display the non-dropped “silence” bytes within the > 6 blocks of data of VC1 & VC2. I believe this should be located in the > first LDU1 frame right after the Header frame. Do this for ADP, DES-OFB, > AES-256. Obviously the number of silence bytes would vary per algorithm. > > That would be very valuable. > > > thanks, > Joe > > > > On Feb 10, 2015, at 7:14 PM, matt.robert80 at yahoo.com [op25-dev] < > op25-dev at yahoogroups.com> wrote: > > I think its possible and would be great to have in OP25 (seeing as this > project is where these flaws were originally discovered and published)... > > I addition the software be tweaked to produce known plaintext and > ciphertext pairs for DES-OFB key recovery as well - leaving the > computational problem up to the user. > > One thing though - adding ADP and DES to the code will result in a massive > increase of people downloading and building OP25, plus the extra attention > it will get us... We should make sure our web server is bulletproof before > releasing such a beast ;) > > Cheers, > Matt > > > > > -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://lists.osmocom.org/pipermail/op25-dev/attachments/20151006/e08a3734/attachment.htm>