(with G. Horváth, J. Lawrence, Cs. Szabó)

*The complexity of the equivalence problem for nonsolvable groups,*Bull. Lond. Math. Soc. 39 (2007), no. 3, 433--438.(with G. Horváth)

*The complexity of checking identities over non-solvable groups,*(Hungarian) Mat. Lapok (N.S.) 13 (2006/07), no. 2, 20--27 (2008).*Construction of large families of pseudorandom binary sequences*, The Ramanujan Journal 18 (2009), 341--349, pdf, the original publication is available at www.springerlink.com.*A construction of pseudorandom binary sequences using rational functions*, Unif. Distrib. Theory, 4 (2009), no. 1, 35--49, pdf*A construction of pseudorandom binary sequences using both additive and multiplicative characters*, Acta Arith. 139 (2009), 241--252, pdf*Construction of pseudorandom binary lattices based on multiplicative characters*, Periodica Math. Hungar. 59 (2009) 43--51, pdf*On finite pseudorandom lattices of $k$ symbols*, Monatsh. Math. 161 (2010), no. 2, 173--191, pdf*Construction of pseudorandom binary lattices using elliptic curves*, Proc. Amer. Math. Soc. 139 (2011), no. 2, 407--420, pdf*Construction of pseudorandom binary sequences over elliptic curves using multiplicative characters*, Publ. Math. Debrecen, 80 (2012) no. 1-2, 199--213, pdf*Remarks on pseudorandom binary sequences over elliptic curves*, Fund. Inform. 114 (2012) no. 3-4, 301--308, pdf(with M. Bárász, P. Ligeti, D. A. Nagy)

*Anonymous sealed bid auction protocol based on a variant of the Dining Cryptographers' protocol,*to appear in Periodica Math. Hungar. pdf*The higher dimensional analogue of certain estimates of Roth and Sárközy*, submitted to Periodica Math. Hungar. pdf

*Voting system*, P0700548, patent pending (submission: 2007, with M. Bárász, P. Ligeti, D. Nagy, P. Sziklai)

*Bidding system*, P0700596, patent pending (submission: 2007, with M. Bárász, P. Ligeti, K. Lója, D. Nagy, P. Sziklai)