| 摘要 |
<P>PROBLEM TO BE SOLVED: To reproduce commodity data at consumer sides without damaging continuity of the commodity data and reproduce commodity data only by authalized consumers even when the commodity data converted into a two dimensional code are divided per designated unit and printed matters capable of obtaining each divided code with symbol printing are sold as a commodity. <P>SOLUTION: A commodity producing device 1 divides commodity data converted into two dimensional codes per designated unit. The dividing information showing a divided state is produced, and is added to the divided codes. The printed matters performing symbol printing are set to be commodities after encoding each dividing code with the divided information by using a secret key. A consumer device 2 reproduces and outputs a series of commodity data obtained by connectively editing each divided code based on the dividing information, after each divided code with the dividing information which is read out from the printed matters per symbol printing is decoded by the secret key. <P>COPYRIGHT: (C)2005,JPO&NCIPI |
