ZUC is a stream cipher included in the Long Term Evolution standards used in 3GPP specifications for confidentiality and integrity. It is named after Zu Chongzhi, the fifth-century Chinese mathematician. It uses a 16-stage linear feedback shift register with each stage in G F ( 2 31 − 1 ) {\displaystyle {\rm {GF}}(2^{31}-1)} and produces a 32-bit word on each tick.
References
Further reading Mukherjee, Chandra Sekhar; Dibyendu Roy; Subhamoy Maitra (2021). Design and Cryptanalysis of ZUC. Springer. ISBN 9789813348820.