US Patent Issued to NTT on Nov. 4 for "Secure equi-join apparatus, secure equi-join method, and program" (Japanese Inventors)

ALEXANDRIA, Va., Nov. 6 -- United States Patent no. 12,461,917, issued on Nov. 4, was assigned to NTT Inc. (Tokyo).

"Secure equi-join apparatus, secure equi-join method, and program" was invented by Junko Hashimoto (Tokyo) and Dai Ikarashi (Tokyo).

According to the abstract* released by the U.S. Patent & Trademark Office: "A secret equi-join device uses as inputs a first concealed table that is concealed information of a first table having a plurality of keys and a second concealed table that is concealed information of a second table having a plurality of keys, obtains a first concealed additional table that is concealed information of a first additional table which is obtained by adding a subkey column to the first table, obtains by sec...