The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Dec. 01, 2020
Filed:
Jan. 18, 2017
Real Technology Inc., Yokohama-shi, Kanagawa, JP;
Hiroyuki Ozaki, Yokohama-shi, Kanagawa, JP;
Hiroyuki Ozaki, Yokohama, JP;
REAL TECHNOLOGY INC., Kanagawa, JP;
HIROYUKI OZAKI, Kanagawa, JP;
Abstract
By introducing inequality to the information dispersal/sharing storage method, a ciphertext management method or the like is provided to support novel ciphertext data management. After the ciphertext and key data are each divided, pairs of the divided ciphertext and key data are generated. Specifically, they are one-to-one paired as with conventional techniques. Furthermore, additional one-to-many pairs are generated. The generated one-to-one pairs provide equality as with conventional techniques. When the number of the one-to-one pairs of the divided ciphertext and key data that can be used is equal to or greater than a threshold number, both the ciphertext data and the key data can be reconstructed, and accordingly, the secret data can be decoded. In contrast, even when the one-to-many pairs that can be used is equal to or greater than a threshold number, the ciphertext data and/or the key data cannot be reconstructed. This provides inequality.