On the sliding property of SNOW 3G and SNOW 2.0

Kircanski, Aleksandar; Youssef, Amr M.

doi:10.1049/iet-ifs.2011.0033

Cited by 30 publications

(27 citation statements)

References 12 publications

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“…At the end of initialization mode, the FSM is performed during one clock cycle, and the associated output word is discarded. Then, the LFSR feedback value is calculated by (4), and the 16 stage registers are updated as follows: For the next clock cycles, the FSM 32-bit output word generated by (5) is mixed with the HC-PRNG 32-bit output word and the register 0 of the LFSR in order to produce the 32-bit keystream word as defined by (20). The architecture of the proposed HC SNOW-3G stream cipher in its keystream mode is given in Figure 6:…”

Section: Keystream Generationmentioning

confidence: 99%

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Digital Implementation of an Improved LTE Stream Cipher Snow-3G Based on Hyperchaotic PRNG

Madani

Benkhaddra

Tanougast

et al. 2017

Security and Communication Networks

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SNOW-3G is a stream cipher used by the 3GPP standards as the core part of the confidentiality and integrity algorithms for UMTS and LTE networks. This paper proposes an enhancement of the regular SNOW-3G ciphering algorithm based on HC-PRNG. The proposed cipher scheme is based on hyperchaotic generator which is used as an additional layer to the SNOW-3G architecture to improve the randomness of its output keystream. The objective of this work is to achieve a high security strength of the regular SNOW-3G algorithm while maintaining its standardized properties. The originality of this new scheme is that it provides a good trade-off between good randomness properties, performance, and hardware resources. Numerical simulations, hardware digital implementation, and experimental results using Xilinx FPGA Virtex technology have demonstrated the feasibility and the efficiency of our secure solution while promising technique can be applied to secure the new generation mobile standards. Thorough analysis of statistical randomness is carried out demonstrating the improved statistical randomness properties of the new scheme compared to the standard SNOW-3G, while preserving its resistance against cryptanalytic attacks.

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Section: Keystream Generationmentioning

confidence: 99%

“…This attack is applicable due to the nature of the initialization process of SNOW-3G; such related keys do not generate slid keystreams, but only keystreams that have several equal words. However, this still allows distinguishing the produced keystream from random keystreams [20].…”

Section: Introductionmentioning

confidence: 99%

Digital Implementation of an Improved LTE Stream Cipher Snow-3G Based on Hyperchaotic PRNG

Madani

Benkhaddra

Tanougast

et al. 2017

Security and Communication Networks

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“…For avoiding access of Z (i) to cryptanalyst during key loading process, DFF is used at output. This DFF will not latch the input string till completion of initialization process [5], [6], [7], [8], [9].…”

Section: Proposed Lili-ii Architecturementioning

confidence: 99%

High Performance Architecture for LILI-II Stream Cipher

Hulle¹,

Kharadkar²,

Dorle³

2014

IJCA

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Proposed work presents high performance architecture for LILI-II stream cipher. This cipher uses 128 bit key and 128 bit IV for initialization of two LFSR. Proposed architecture uses single clock for both LFSRs, so this architecture will be useful in high speed communication applications. Presented architecture uses four bit shifting of LFSR D in single clock cycle without losing any data items from function F C . Proposed architecture is coded by using VHDL language with CAD tool Xilinx ISE Design Suite 13.2 and targeted hardware is Xilinx Virtex5 FPGA having device xc4vlx60, with package ff1148. Proposed architecture achieved throughput of 224.7 Mbps at 224.7 MHz frequency. General TermsHardware implementation of stream ciphers

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“…In [11], Yuseop, Kitae, Jaechul and Seokhie had extended the attack proposed in [9] and presented related key chosen IV attacks on Grain-v1 and Grain-128. In [12], Kircanski and Youssef showed that the initialization procedure of SNOW 3G and SNOW 2.0 admits a sliding property, resulting in several sets of related-key pairs. Ding and Guan [13], [14] presented related key chosen IV attacks on K2, Decim v2 and Decim-128 stream ciphers.…”

Section: Introductionmentioning

confidence: 99%

Related Key Chosen IV Attack on Grain-128a Stream Cipher

Ding

Guan

2013

IEEE Trans.Inform.Forensic Secur.

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The well-known stream cipher Grain-128 is a variant version of Grain v1 with 128-bit secret key. Grain v1 is a stream cipher which has successfully been chosen as one of seven finalists by European eSTREAM project. Yet Grain-128 is vulnerable against some recently introduced attacks. A new version of Grain-128 with authentication, named Grain-128a, is proposed by Ågren, Hell, Johansson, and Meier. The designers claimed that Grain-128a is strengthened against all known attacks and observations on the original Grain-128. So far there exists no attack on Grain-128a except a differential fault attack by Banik, Maitra, and Sarkar. In this paper, we give some observations on Grain-128a, and then propose a related key chosen IV attack on Grain-128a based on these observations. Our attack can recover the 128-bit secret key of Grain-128a with a computational complexity of , requiring chosen IVs and keystream bits. The success probability of our attack is 0.632. This related key attack is "minimal" in the sense that it only requires two related keys. The result shows that our attack is much better than an exhaustive key search in the related key setting.

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On the sliding property of SNOW 3G and SNOW 2.0

Cited by 30 publications

References 12 publications

Digital Implementation of an Improved LTE Stream Cipher Snow-3G Based on Hyperchaotic PRNG

Digital Implementation of an Improved LTE Stream Cipher Snow-3G Based on Hyperchaotic PRNG

High Performance Architecture for LILI-II Stream Cipher

Related Key Chosen IV Attack on Grain-128a Stream Cipher

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