A random keystream generation apparatus and method for use in an encryption system, generates an m-bit random keystream, using a PS-LFSR with n storage stages for storing n-bit binary data is divided into k sub-storages connected in series, each sub-storage having parallel storage stages (k is a minimum...http://www.google.com.tw/patents/US7046803?utm_source=gb-gplus-share專利 US7046803 - Random keystream generation apparatus and method for use in an encryption system
