American Institute of Mathematical Sciences

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November  2016, 10(4): 797-809. doi: 10.3934/amc.2016041

Modelling the shrinking generator in terms of linear CA

Sara D. Cardell 1, and  Amparo Fúster-Sabater 2,

1. 

Instituto de Matemática, Estatística e Computação Científica, Universidade Estadual de Campinas (UNICAMP), R. Sérgio Buarque de Holanda, 651, Cidade Universitária, Campinas - SP, 13083-859
2. 

Instituto de Tecnologías Físicas y de la Información, Consejo Superior de Investigaciones Científicas, C/Serrano 144, 28006, Madrid, Spain

Received  December 2014 Revised  June 2016 Published  November 2016

This work analyses the output sequence from a cryptographic non-linear generator, the so-called shrinking generator. This sequence, known as the shrunken sequence, can be built by interleaving a unique PN-sequence whose characteristic polynomial serves as basis for the shrunken sequence's characteristic polynomial. In addition, the shrunken sequence can be also generated from a linear model based on cellular automata. The cellular automata here proposed generate a family of sequences with the same properties, period and characteristic polynomial, as those of the shrunken sequence. Moreover, such sequences appear several times along the cellular automata shifted a fixed number. The use of discrete logarithms allows the computation of such a number. The linearity of these cellular automata can be advantageously employed to launch a cryptanalysis against the shrinking generator and recover its output sequence.
Keywords: Shrinking generator, interleaved PN-sequences, cellular automata, characteristic polynomial., rule 102, shrunken sequence.
Mathematics Subject Classification: Primary: 37B15, 11B85; Secondary: 12E0.
Citation: Sara D. Cardell, Amparo Fúster-Sabater. Modelling the shrinking generator in terms of linear CA. Advances in Mathematics of Communications, 2016, 10 (4) : 797-809. doi: 10.3934/amc.2016041
References:
[1]

S. D. Cardell and A. Fúster-Sabater, Cryptanalysing the shrinking generator,, Proc. Comp. Sci., 51 (2015), 2893.   Google Scholar

[2]

S. D. Cardell and A. Fúster-Sabater, Performance of the cryptanalysis over the shrinking generator,, in Int. Joint Conf. CISIS'15 and ICEUTE'15 (eds. A.H. et al.), (2015), 111.   Google Scholar

[3]

S. D. Cardell and A. Fúster-Sabater, Linear models for the self-shrinking generator based on CA,, J. Cell. Autom., 11 (2016), 195.   Google Scholar

[4]

K. Cattell and J. C. Muzio, One-dimensional linear hybrid cellular automata,, IEEE Trans. Comp.-Aided Des., 15 (1996), 325.  doi: 10.1109/12.508317.  Google Scholar

[5]

D. Coppersmith, H. Krawczyk and Y. Mansour, The shrinking generator,, in Adv. Crypt. - CRYPTO '93, (1993), 23.  doi: 10.1007/3-540-48329-2_3.  Google Scholar

[6]

A. K. Das, A. Ganguly, A. Dasgupta, S. Bhawmik and P. P. Chaudhuri, Efficient characterisation of cellular automata,, IEEE Proc. Comp. Dig. Techn., 137 (1990), 81.   Google Scholar

[7]

S. Das and D. RoyChowdhury, Car30: A new scalable stream cipher with rule 30,, Crypt. Commun., 5 (2013), 137.  doi: 10.1007/s12095-012-0079-1.  Google Scholar

[8]

P. F. Duvall and J. C. Mortick, Decimation of periodic sequences,, SIAM J. Appl. Math., 21 (1971), 367.   Google Scholar

[9]

A. Fúster-Sabater and P. Caballero-Gil, Linear solutions for cryptographic nonlinear sequence generators,, Phys. Lett. A, 369 (2007), 432.  doi: 10.1063/1.2827050.  Google Scholar

[10]

A. Fúster-Sabater, M. E. Pazo-Robles and P. Caballero-Gil, A simple linearization of the self-shrinking generator by means of cellular automata,, Neural Netw., 23 (2010), 461.   Google Scholar

[11]

S. W. Golomb, Shift Register-Sequences,, Aegean Park Press, (1982).   Google Scholar

[12]

J. Jose, S. Das and D. RoyChowdhury, Inapplicability of fault attacks against trivium on a cellular automata based stream cipher,, in 11th Int. Conf. Cell. Autom. Res. Ind. ACRI 2014, (2014), 427.   Google Scholar

[13]

A. Kanso, Modified self-shrinking generator,, Comp. Electr. Engin., 36 (2010), 993.   Google Scholar

[14]

R. Lidl and H. Niederreiter, Introduction to Finite Fields and their Applications,, Cambridge Univ. Press, (1986).   Google Scholar

[15]

J. L. Massey, Shift-register synthesis and BCH decoding,, IEEE Trans. Inform. Theory, 15 (1969), 122.   Google Scholar

[16]

W. Meier and O. Staffelbach, Analysis of pseudo random sequences generated by cellular automata,, in Adv. Crypt. - EUROCRYPTO '91, (1991), 186.  doi: 10.1007/3-540-46416-6_17.  Google Scholar

[17]

W. Meier and O. Staffelbach, The self-shrinking generator,, in Adv. Crypt. - EUROCRYPT 1994, (1994), 205.  doi: 10.1007/BFb0053436.  Google Scholar

[18]

A. J. Menezes, P. C. van Oorschot and S. A. Vanstone, Handbook of Applied Cryptography,, CRC Press, (1996).   Google Scholar

[19]

M. Mihaljević, Y. Zheng and H. Imai, A fast and secure stream cipher based on cellular automata over GF(q),, in Proc. Global Telecomm. Conf. GLOBECOM 1998, (1998), 3250.   Google Scholar

[20]

C. Paar and J. Pelzl, Understanding Cryptography,, Springer, (2010).   Google Scholar

[21]

S. Wolfram, Cellular automata as simple self-organizing system,, Caltrech preprint, (1982), 68.   Google Scholar

[22]

S. Wolfram, Cryptography with cellular automata,, in Adv. Crypt. - EUROCRYPT 1985, (1985), 429.   Google Scholar

show all references

References:
[1]

S. D. Cardell and A. Fúster-Sabater, Cryptanalysing the shrinking generator,, Proc. Comp. Sci., 51 (2015), 2893.   Google Scholar

[2]

S. D. Cardell and A. Fúster-Sabater, Performance of the cryptanalysis over the shrinking generator,, in Int. Joint Conf. CISIS'15 and ICEUTE'15 (eds. A.H. et al.), (2015), 111.   Google Scholar

[3]

S. D. Cardell and A. Fúster-Sabater, Linear models for the self-shrinking generator based on CA,, J. Cell. Autom., 11 (2016), 195.   Google Scholar

[4]

K. Cattell and J. C. Muzio, One-dimensional linear hybrid cellular automata,, IEEE Trans. Comp.-Aided Des., 15 (1996), 325.  doi: 10.1109/12.508317.  Google Scholar

[5]

D. Coppersmith, H. Krawczyk and Y. Mansour, The shrinking generator,, in Adv. Crypt. - CRYPTO '93, (1993), 23.  doi: 10.1007/3-540-48329-2_3.  Google Scholar

[6]

A. K. Das, A. Ganguly, A. Dasgupta, S. Bhawmik and P. P. Chaudhuri, Efficient characterisation of cellular automata,, IEEE Proc. Comp. Dig. Techn., 137 (1990), 81.   Google Scholar

[7]

S. Das and D. RoyChowdhury, Car30: A new scalable stream cipher with rule 30,, Crypt. Commun., 5 (2013), 137.  doi: 10.1007/s12095-012-0079-1.  Google Scholar

[8]

P. F. Duvall and J. C. Mortick, Decimation of periodic sequences,, SIAM J. Appl. Math., 21 (1971), 367.   Google Scholar

[9]

A. Fúster-Sabater and P. Caballero-Gil, Linear solutions for cryptographic nonlinear sequence generators,, Phys. Lett. A, 369 (2007), 432.  doi: 10.1063/1.2827050.  Google Scholar

[10]

A. Fúster-Sabater, M. E. Pazo-Robles and P. Caballero-Gil, A simple linearization of the self-shrinking generator by means of cellular automata,, Neural Netw., 23 (2010), 461.   Google Scholar

[11]

S. W. Golomb, Shift Register-Sequences,, Aegean Park Press, (1982).   Google Scholar

[12]

J. Jose, S. Das and D. RoyChowdhury, Inapplicability of fault attacks against trivium on a cellular automata based stream cipher,, in 11th Int. Conf. Cell. Autom. Res. Ind. ACRI 2014, (2014), 427.   Google Scholar

[13]

A. Kanso, Modified self-shrinking generator,, Comp. Electr. Engin., 36 (2010), 993.   Google Scholar

[14]

R. Lidl and H. Niederreiter, Introduction to Finite Fields and their Applications,, Cambridge Univ. Press, (1986).   Google Scholar

[15]

J. L. Massey, Shift-register synthesis and BCH decoding,, IEEE Trans. Inform. Theory, 15 (1969), 122.   Google Scholar

[16]

W. Meier and O. Staffelbach, Analysis of pseudo random sequences generated by cellular automata,, in Adv. Crypt. - EUROCRYPTO '91, (1991), 186.  doi: 10.1007/3-540-46416-6_17.  Google Scholar

[17]

W. Meier and O. Staffelbach, The self-shrinking generator,, in Adv. Crypt. - EUROCRYPT 1994, (1994), 205.  doi: 10.1007/BFb0053436.  Google Scholar

[18]

A. J. Menezes, P. C. van Oorschot and S. A. Vanstone, Handbook of Applied Cryptography,, CRC Press, (1996).   Google Scholar

[19]

M. Mihaljević, Y. Zheng and H. Imai, A fast and secure stream cipher based on cellular automata over GF(q),, in Proc. Global Telecomm. Conf. GLOBECOM 1998, (1998), 3250.   Google Scholar

[20]

C. Paar and J. Pelzl, Understanding Cryptography,, Springer, (2010).   Google Scholar

[21]

S. Wolfram, Cellular automata as simple self-organizing system,, Caltrech preprint, (1982), 68.   Google Scholar

[22]

S. Wolfram, Cryptography with cellular automata,, in Adv. Crypt. - EUROCRYPT 1985, (1985), 429.   Google Scholar

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