| 摘要 |
<p>TO REALIZE AN INFORMATION PROCESSING SYSTEM AND METHOD CAPABLE REDUCING DATA QUANTITY OF AN ENABLING KEY BLOCK (EKB) USED IN AN ENCIPHER CONSTITUTION OF A TREE CONSTRUCTION. THE ENABLING KEY BLOCK (EKB) USED IN ENCIPHER KEY CONSITUTION OF A TREE CONSTRUCTION IS PRODUCED BY RECONSTRUCTIN SIMPLIFIED 2-BRANCH OR MULTI-BRANCH TYPE TREE WITH A DECODABLE TERMINAL NODE OR AS THE LOWEST STAGE, AND ON THE BASIS OF ONLY THE KEY CORRESPONDING TO A NODE LEAF OF THE RECONSTRUCTED HIERARCHICAL TREE. FURTHER, A TAG AS DISCRIMINATION DATA TREE POSITION OF AN ENCIPHER KEY STORED IN EKB IS STORED. THE TAG (607) NOT DISCRIMINATES A POSITION BUT STORES DATA FOR JUDGING PRESENCE OF ENCIPHER KEY I WITHIN EKB. A CONSIDERABLE REDUCTION IN DATA QUANTITY IS REALIZED, AND DECO PROCESS IN A DEVICE IS ALSO SIMPLIFIED.(FIG 9A,9B,9C)</p> |
