ZUC stream cipher
# ZUC stream cipher

ZUC is a stream cipher included in the Long Term Evolution standards starting in Release 11 for mobile devices. It is named after Zu Chongzhi, the fifth-century Chinese mathematician.

It uses a 16-stage linear feedback shift register with each stage in ${\rm {GF}}(2^{31}-1)$ and produces a 32-bit word on each tick.

