Zuc stream cipher

ZUC is a stream cipher included in the Long Term Evolution standards starting in Release 11 for mobile devices.[1][2]

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.

References

"3GPP Technical Specification 35.222".
"Specification of the 3GPP Confidentiality and Integrity Algorithms 128-EEA3 & 128-EIA3: Document 2: ZUC Specification" (PDF).

Further reading

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

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