A5/1
A5/1. A5/1 consists of 3 shift registers X : 19 bits ( x 18 , x 17 , x 16 , …,x 0 ) Y : 22 bits ( y 21 , y 20 , y 19 , …,y 0 ) Z : 23 bits ( z 22 , z 21 , z 20 , …,z 0 ). A5/1. At each step: m = maj( x 8 , y 10 , z 10 ) Examples: maj(0 ,1,0) = 0 and maj(1 ,1,0) = 1
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