Maybe this - http://xdaforums.com/showthread.php?t=1109363
But this may not work on ics..since this feature was removed..the only way is to compile rom from sources just like cm roms....
For a last resort u cud use this - https://play.google.com/store/apps/...m_medium=organic&utm_term=screen+lock+android
Cheers,
AJ
Well thanks bro, but I'm on JB and would prefer an animation encrypted within the system that works by pressing power button!!
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