H - Electricity – 04 – L
Patent
H - Electricity
04
L
H04L 9/14 (2006.01)
Patent
CA 2421142
A plurality of round processing parts (38) are provided each of which contains a nonlinear function part (304), and each nonlinear function part (304) comprises: a first key-dependent linear transformation part (341) which performs a linear transformation based on a subkey; a splitting part (342) which splits the output from the first key-dependent linear transformation part into n pieces of subdata; a first nonlinear transformation part (343) which nonlinearly transforms those pieces of subdata, respectively; a second key-dependent linear transformation part (344) which linearly transforms those nonlinearly transformed outputs based on a subkey and outputs n pieces of transformed subdata; a second nonlinear transformation part (345) which nonlinearly transforms those transformed subdata; and a combining part (346) which combines the nonlinearly transformed outputs. An n x n matrix, which represents the linear transformation in the second key-dependent linear transformation part (344), is formed by n vectors whose Hamming weights are equal to or larger than T-1 for a security threshold T, thereby increasing the invulnerability against differential cryptanalysis and linear cryptanalysis.
Aoki Kazumaro
Kanda Masayuki
Matsumoto Tsutomu
Ohta Kazuo
Takashima Youichi
Kirby Eades Gale Baker
Nippon Telegraph And Telephone Corporation
LandOfFree
Data transformation device and recording medium having... does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Data transformation device and recording medium having..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Data transformation device and recording medium having... will most certainly appreciate the feedback.
Profile ID: LFCA-PAI-O-1742091