@misc{cryptoeprint:2009:346, author = {Wenling Wu and Lei Zhang and Liting Zhang and Wentao Zhang}, title = {Security Analysis of the GF-NLFSR Structure and Four-Cell Block Cipher}, howpublished = {Cryptology ePrint Archive, Report 2009/346}, year = {2009}, url = {http://eprint.iacr.org/2009/346}, }