Introduction ============ Graphem is a small mouse gesture based authentication program and screen locker for X11. Project home page: http://graphem.berlios.de/ Installation ============ Graphem requires Qt4 and QCA2 libraries, please install the development libraries (called libqt4-dev and libqca2-dev on Debian/Ubuntu) before compilation via: qmake-qt4 make Configuration ============= The configuration window is shown when Graphem is started without any arguments. You can now set a new key pattern via File -> New Pattern. You can either draw your own pattern or let Graphem generate a random key for you by clicking the 'Generate Pattern' button. After accepting the displayed pattern you should test wether it is recognized correctly in the main window. To increase the recognition rate, it often helps to speed up mouse movements. For your own key patterns you should make sure to only include strokes that are present each time it is drawn. When you are satisfied with the results, use File -> Save to save the new key pattern to disk, overwriting the previous one (if any). In the preferences dialog (File -> Preferences) you can configure the amount of time Graphem may spend trying to match the input to your key pattern before you can retry. You may want to increase the timeout for older machines or pariticularly long keys, for most other cases it is usually more effective to re-input your pattern than to do an exhaustive search. If you aren't concerned about 'shoulder surfing' you can also have it display your input while authenticating. Locking the screen ================== To lock the screen, add the --lock argument when executing Graphem. You should test your key pattern a few times in the configuration window so you don't lock yourself out. Scripting ========= When calling Graphem from a script, you'll want to use the --ask argument. The user can then enter their key pattern or press ESC to cancel the dialog. Return code 0 indicates success, 1 means the dialog was canceled or the number of possible tries was exceeded. To set the number of tries, add --tries [n] to the command line. The default allows an infinite number of retries.
