US 12,476,817 B2
Secure consolidation system, information processing apparatus, secure consolidation method, and program
Koki Hamada, Tokyo (JP); Koji Chida, Tokyo (JP); Masanobu Kii, Tokyo (JP); Atsunori Ichikawa, Tokyo (JP); and Junichi Tomida, Tokyo (JP)
Assigned to NTT, Inc., Tokyo (JP)
Appl. No. 18/556,518
Filed by NTT, Inc., Tokyo (JP)
PCT Filed May 21, 2021, PCT No. PCT/JP2021/019342
§ 371(c)(1), (2) Date Oct. 20, 2023,
PCT Pub. No. WO2022/244227, PCT Pub. Date Nov. 24, 2022.
Prior Publication US 2024/0214212 A1, Jun. 27, 2024
Int. Cl. H04L 9/32 (2006.01)
CPC H04L 9/3236 (2013.01) 7 Claims
OG exemplary drawing
 
1. A secure collation system comprising a first information processing apparatus and a second information processing apparatus,
wherein the second information processing apparatus is configured to:
receive a first vector having a hash value of a key value of the first information processing apparatus as an element, and create a second vector by adding a dummy hash value to the first vector and rearranging the first vector by random permutation;
create a third vector having, as elements, a hash value of a key value of the second information processing apparatus and a hash value of a dummy key value; and
transmit the second vector and the third vector to the first information processing apparatus, and
wherein the first information processing apparatus is configured to:
receive the second vector and the third vector, calculate a hash value of an element of the third vector and create a fourth vector having the hash value as an element; and
collate matched values between each element of the third vector and each element of the fourth vector.