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. 10, 2024
Filed:
Jan. 09, 2020
Nippon Telegraph and Telephone Corporation, Tokyo, JP;
Koki Hamada, Musashino, JP;
Atsunori Ichikawa, Musashino, JP;
NIPPON TELEGRAPH AND TELEPHONE CORPORATION, Tokyo, JP;
Abstract
Access to an array is efficiently performed without reveling an accessed position. A storagestores an array of concealed values [x'] of an array x′and an array of addresses a′corresponding to respective elements of the array of concealed values [x′]. A refresh unitdetermines a concealed value [F] of a random parameter F, an array of concealed values [x] of an array xgenerated by permutating the array x′with random permutation ρ, and an array of public tags bcalculated from respective elements of the array of addresses awith the function Tag. An access unitperforms a desired access to an element of the array of concealed values [x] corresponding to a tag that is calculated from a concealed value [j] of an access position j with the function Tag and the concealed value [F] of the parameter.