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Reference.org
ZUC stream cipher
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<p>ZUC is a stream <a href="/facts/Cipher/eJnuftYe">cipher</a> included in the <a href="/facts/Long_Term_Evolution/72QhwXHT">Long Term Evolution</a> standards used in 3GPP specifications for confidentiality and integrity . It is named after <a href="/facts/Zu_Chongzhi/gqfBj1n1">Zu Chongzhi</a>, the fifth-century Chinese mathematician. </p><p>It uses a 16-stage <a href="/facts/Linear_feedback_shift_register/22pktBbX">linear feedback shift register</a> with each stage in G F ( 2 31 − 1 ) {\displaystyle {\rm {GF}}(2^{31}-1)} and produces a 32-bit word on each tick. </p>