Patent ID: 6744894
Filing Date: 2004-06-01
Classification: G06F,G06Q,H04L,H04N

Abstract:
A system for managing digital data to be transferred from an owner of data to a user of data via broadcast, a communication network or data recording medium, comprising:public-key, private-key, user label and edit label used in the data management system; a data management center and the owner linked to a public-key storage, and arranged on said communication network; said data management center certifying public-keys of said owner and said user and storing said user label and said edit label; a first user obtaining said digital data from said communication network by presenting said user label to use said digital data, editing the digital data, and obtaining said edit label from said communication network by presenting said user label and an editing scenario, wherein said digital data is not stored in a device of each of said user after using said digital data, and said edit label is transferred to a next user without said digital data for the next user's use of said digital data.