DATA DIVIDING DEVICE, DATA DIVIDING METHOD, AND COMPUTER PROGRAM

Japanese Patent JP2007041199

A

To efficiently divide original data in comparatively simple processing.

Original data S, the number of partitions n, processing unit bit length b are set. A plurality of original partial data S(j) are generated by dividing the original data S by the processing unit bit length b, a plurality of random number partial data R(j) are generated, and each division partial data D(i, j) constituting each division data D(i) is generated according to a prescribed definition equation comprising the original partial data and an exclusive OR of the random number partial data. Also, each division partial data is rotationally replaced with each division partial data of other division data corresponding to the respective division partial data so as to prevent random number components from being lost by performing the exclusive OR between division partial data constituting the division data using only one of the division data. Further, by deleting D(1, j) beforehand, the storage capacity for storing the division data is suppressed.

JP4446400	Digital watermark embedding method and authentication method for content
JP4872261	Safety evaluation device and safety evaluation program
JP2007115025	IMAGE FORMING METHOD, IMAGE FORMING APPARATUS, PROGRAM AND RECORDING MEDIUM

ISHINO MAMORU
OGIWARA TOSHIHIKO
MAKINO MASAKI

JP2005223999A

February 15, 2007

August 02, 2005

Click for automatic bibliography generation  

NTT COMM KK

G09C1/00; G06F21/62

JP2004147218A	2004-05-20
JP2007042027A	2007-02-15
JP2004336702A	2004-11-25

Hidekazu Miyoshi
Masakazu Ito
Shunichi Takahashi
Toshio Takamatsu

Previous Patent: IMAGING APPARATUS, PHOTOGRAPHIC PROCESSING CONTROL METHOD AND COMPUTER PROGRAM

Next Patent: RESIST COMPOSITION AND METHOD FOR FORMING PATTERN USING THE SAME