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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 ${\displaystyle {\rm {GF}}(2^{31}-1)}$ and produces a 32-bit word on each tick.

References

1. "3GPP Technical Specification 35.222".
2. "Specification of the 3GPP Confidentiality and Integrity Algorithms 128-EEA3 & 128-EIA3: Document 2: ZUC Specification" (PDF).
3. "ZUC". Mpirical Glossary. Mpirical Ltd. 2022. Retrieved 1 Jun 2022.

Further reading

• Mukherjee, Chandra Sekhar; Dibyendu Roy; Subhamoy Maitra (2021). Design and Cryptanalysis of ZUC. Springer. ISBN 9789813348820.

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