简化版Trivium算法的线性逼近研究

doi:10.11959/j.issn.1000-436x.2016108

Abstract

Meng MA,Ya-qun ZHAO. Research on linear approximations of simplified Trivium[J]. Journal on Communications, 2016, 37(6): 185-191.

Figures/Tables 3

第1轮非线性逼近式	指定为零的比特	z₁的线性近似
$z_{1} = R \oplus s_{144} (82) s_{144} (83)$	$E, i v_{34} = 0$	$z_{1} = F \oplus i v_{23} \oplus i v_{38} \oplus i v_{68}$
$z_{1} = R \oplus s_{144} (82) s_{144} (83) \oplus s_{144} (163)$	$E, i v_{34} = 0$	$z_{1} = F \oplus k_{61} \oplus i v_{4} \oplus i v_{23} \oplus i v_{38} \oplus i v_{68}$
$z_{1} = R \oplus s_{144} (82) s_{144} (83) \oplus s_{144} (164)$	$E, i v_{34} = 0$	$z_{1} = F \oplus k_{20} \oplus k_{62} \oplus i v_{5} \oplus i v_{23} \oplus i v_{38} \oplus i v_{68}$
$z_{1} = R \oplus s_{144} (82) s_{144} (83) \oplus s_{144} (32)$	$E, i v_{67} = 0$	$z_{1} = F \oplus k_{26}$
$z_{1} = R \oplus s_{144} (82) s_{144} (83) \oplus s_{144} (163) \oplus s_{144} (32)$	$E, i v_{67} = 0$	$z_{1} = F \oplus k_{26} \oplus k_{61} \oplus i v_{4}$
$z_{1} = R \oplus s_{144} (82) s_{144} (83) \oplus s_{144} (164) \oplus s_{144} (32)$	$E, i v_{67} = 0$	$z_{1} = F \oplus k_{20} \oplus k_{26} \oplus k_{62} \oplus i v_{5}$
$z_{1} = R \oplus s_{144} (163) s_{144} (88) \oplus s_{144} (82)$	$E, i v_{34} = 0$	$z_{1} = F \oplus k_{7} \oplus i v_{23} \oplus i v_{38} \oplus i v_{68}$
$z_{1} = R \oplus s_{144} (163) s_{144} (88) \oplus s_{144} (83)$	$E, i v_{34} = 0$	$z_{1} = F \oplus k_{8} \oplus i v_{23} \oplus i v_{38} \oplus i v_{68}$
$z_{1} = R \oplus s_{144} (163) s_{144} (88) \oplus s_{144} (163) \oplus s_{144} (83)$	$E, i v_{34} = 0$	$z_{1} = F \oplus k_{8} \oplus k_{61} \oplus i v_{4} \oplus i v_{23} \oplus i v_{38} \oplus i v_{68}$
$z_{1} = R \oplus s_{144} (163) s_{144} (88) \oplus s_{144} (163) \oplus s_{144} (82)$	$E, i v_{34} = 0$	$z_{1} = F \oplus k_{7} \oplus k_{61} \oplus i v_{4} \oplus i v_{23} \oplus i v_{38} \oplus i v_{68}$
$z_{1} = R \oplus s_{144} (163) s_{144} (88) \oplus s_{144} (83) \oplus s_{144} (32)$	$E, i v_{67} = 0$	$z_{1} = F \oplus k_{8} \oplus k_{26}$
$z_{1} = R \oplus s_{144} (163) s_{144} (88) \oplus s_{144} (82) \oplus s_{144} (32)$	$E, i v_{67} = 0$	$z_{1} = F \oplus k_{7} \oplus k_{26}$
$z_{1} = R \oplus s_{144} (163) s_{144} (88) \oplus s_{144} (163) \oplus s_{144} (82) \oplus s_{144} (32)$	$E, i v_{67} = 0$	$z_{1} = F \oplus k_{7} \oplus k_{26} \oplus k_{61} \oplus i v_{4}$
$z_{1} = R \oplus s_{144} (163) s_{144} (88) \oplus s_{144} (163) \oplus s_{144} (83) \oplus s_{144} (32)$	$E, i v_{67} = 0$	$z_{1} = F \oplus k_{8} \oplus k_{26} \oplus k_{61} \oplus i v_{4}$
$z_{1} = R \oplus s_{144} (164) s_{144} (88) \oplus s_{144} (164) \oplus s_{144} (83) \oplus s_{144} (32)$	$E, i v_{67} = 0$	$z_{1} = F \oplus k_{8} \oplus k_{20} \oplus k_{26} \oplus k_{62} \oplus i v_{5}$
$z_{1} = R \oplus s_{144} (164) s_{144} (88) \oplus s_{144} (164) \oplus s_{144} (82) \oplus s_{144} (32)$	$E, i v_{67} = 0$	$z_{1} = F \oplus k_{7} \oplus k_{20} \oplus k_{26} \oplus k_{62} \oplus i v_{5}$

第1轮非线性逼近式G₁	指定为零的比特	z₁的线性近似
$z_{1} = R \oplus s_{141} (91) s_{141} (92)$	$E, i v_{34} = 0$	$z_{1} = F \oplus i v_{23} \oplus i v_{38} \oplus i v_{68}$
$z_{1} = R \oplus s_{141} (91) s_{141} (92) \oplus s_{141} (80)$	$E, i v_{34} = 0$	$z_{1} = F \oplus k_{8} \oplus i v_{23} \oplus i v_{38} \oplus i v_{68}$
$z_{1} = R \oplus s_{141} (91) s_{141} (92) \oplus s_{141} (79)$	$E, i v_{34} = 0$	$z_{1} = F \oplus k_{7} \oplus i v_{23} \oplus i v_{38} \oplus i v_{68}$
$z_{1} = R \oplus s_{141} (91) s_{141} (92) \oplus s_{141} (29)$	$E, i v_{67} = 0$	$z_{1} = F \oplus k_{26}$
$z_{1} = R \oplus s_{141} (91) s_{141} (92) \oplus s_{141} (80) \oplus s_{141} (29)$	$E, i v_{67} = 0$	$z_{1} = F \oplus k_{8} \oplus k_{26}$
$z_{1} = R \oplus s_{141} (91) s_{141} (92) \oplus s_{141} (79) \oplus s_{141} (29)$	$E, i v_{67} = 0$	$z_{1} = F \oplus k_{20} \oplus k_{26} \oplus k_{62} \oplus i v_{5}$

$(\| O_{K} \|, \| O_{I V} \|)$	方法	偏差	线性近似个数	数据量	线性攻击成功率
(10,8)	文献[12]	2^－29	1	2⁵⁸	97.77%
	本文	2^－25.42	16	2^46.84	97.77%
	文献[9]	2^－31	1	2⁶²	97.77%
	文献[10]	2^－31	2	2⁶¹	97.77%
(10,10)	文献[11]	2^－25	1	2⁵⁰	97.77%
	文献[12]	2^－30	8	2⁵⁷	97.77%
	本文	2^－23.42	16	2^42.84	97.77%
	文献[10]	2^－31	2	2⁶¹	97.77%
(10,13)	文献[11]	2^－22	1	2⁴⁴	97.77%
	本文	2^－20.42	16	2^36.84	97.77%

References 15

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