The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
May. 16, 2006
Filed:
Apr. 02, 2002
Hoon-jae Lee, Taegu-Kwangyokshi, KR;
Sang-jae Moon, Taegu-Kwangyokshi, KR;
Sang-jun Park, Seoul, KR;
Hoon-Jae Lee, Taegu-Kwangyokshi, KR;
Sang-Jae Moon, Taegu-Kwangyokshi, KR;
Sang-Jun Park, Seoul, KR;
Abstract
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 integer larger than the quotient of n divided by m). Each sub-storage stores in the parallel storage stages m-bit parallel binary data received from the previous sub-storage and outputs the m-bit parallel binary data simultaneously in accordance with a system clock signal. A buffer has m storage stages to store m-bit parallel data received from the last sub-storage of the PS-LFSR. M feedback connections receive the outputs of the sub-storages and the buffer corresponding to predetermined primitive polynomials, calculate the primitive polynomials with the received data, and output the calculation results as the bits of the m-bit keystream sequence.