ZUC stream cipher explained

ZUC is a stream cipher included in the Long Term Evolution standards used in 3GPP specifications for confidentiality and integrity .^{[1] [2]} It is named after Zu Chongzhi, the fifth-century Chinese mathematician.^[3]

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.

Further reading

• Book: Design and Cryptanalysis of ZUC . Mukherjee . Chandra Sekhar . Dibyendu Roy . Subhamoy Maitra . 2021 . Springer . 9789813348820 .

Notes and References

1. Web site: 3GPP Technical Specification 35.222.
2. Web site: Specification of the 3GPP Confidentiality and Integrity Algorithms 128-EEA3 & 128-EIA3: Document 2: ZUC Specification.
3. Web site: ZUC . . 2022 . Mpirical Glossary . Mpirical Ltd . 1 Jun 2022.