brmlab

User Tools

Site Tools

You are here: Hackerspace Prague » Projects » GSM » Deka - an OpenCL A5/1 cracker
project:gsm:deka:start

Differences

This shows you the differences between two versions of the page.

Link to this comparison view

Both sides previous revisionPrevious revision
project:gsm:deka:start [2017/10/21 04:21] – jendaproject:gsm:deka:start [2022/03/25 19:42] (current) – [Attack in a nutshell] update link jenda
Line 34: Line 34:
 TL;DR You can go through the A5/1 keyspace and save some "distinguished points". When you want to recover the key, you reconstruct the keyspace from the nearest distinguished point. ([[attack-theory|I want to know more!]]) TL;DR You can go through the A5/1 keyspace and save some "distinguished points". When you want to recover the key, you reconstruct the keyspace from the nearest distinguished point. ([[attack-theory|I want to know more!]])
  
-Deka listens on a TCP socket, waits for a keystream and once you submit one, it finds a secret state that resulted in this keystream. Hence you need some GSM sniffer, keystream guesser, TCP client and secret state processor. [[:user:jenda:gsm|gsmtk]] implements exactly that.+Deka listens on a TCP socket, waits for a keystream and once you submit one, it finds a secret state that resulted in this keystream. Hence you need some GSM sniffer, keystream guesser, TCP client and secret state processor. [[https://jenda.hrach.eu/w/gsm|gsmtk]] implements exactly that.
  
 Recommended configuration: Recommended configuration:
project/gsm/deka/start.txt · Last modified: 2022/03/25 19:42 by jenda