US 12,341,877 B2
Secret calculation system, secret calculation method, and secret calculation program
Koutarou Tamura, Tokyo (JP); and Yasunori Hokazono, Tokyo (JP)
Assigned to Nomura Research Institute, Ltd., Tokyo (JP)
Filed by Nomura Research Institute, Ltd., Tokyo (JP)
Filed on Sep. 1, 2022, as Appl. No. 17/901,523.
Claims priority of application No. 2022-015037 (JP), filed on Feb. 2, 2022.
Prior Publication US 2023/0246824 A1, Aug. 3, 2023
Int. Cl. H04L 9/08 (2006.01); H04L 9/14 (2006.01)
CPC H04L 9/085 (2013.01) [H04L 9/14 (2013.01)] 15 Claims
OG exemplary drawing
 
1. A secret calculation system comprising: an acquisition unit that acquires each one of a plurality of pieces of processing target data from each one of a plurality of information terminals, wherein each one of the plurality of pieces of processing target data is encrypted using a plurality of pieces of different key information each generated by different one of a plurality of information processing systems;
a secret calculation unit that generates result data indicating a result of calculation based on the plurality of pieces of processing target data in a state where the plurality of pieces of processing target data are encrypted wherein the plurality of information processing systems include the secret calculation system and a server communicably connected to the secret calculation system via a network and each one of the plurality of pieces of processing target data is encrypted using each one of first keys issued by the secret calculation system and each one of second keys which are different from the first keys and issued by the server; and
a providing unit that provides the result data to the plurality of information terminals.