US 11,791,993 B2
Shared key system, information processing apparatus, equipment, shared key method and program
Akira Nagai, Tokyo (JP); and Kotaro Suzuki, Tokyo (JP)
Assigned to NIPPON TELEGRAPH AND TELEPHONE CORPORATION, Tokyo (JP)
Appl. No. 17/58,116
Filed by NIPPON TELEGRAPH AND TELEPHONE CORPORATION, Tokyo (JP)
PCT Filed Apr. 25, 2019, PCT No. PCT/JP2019/017804
§ 371(c)(1), (2) Date Nov. 23, 2020,
PCT Pub. No. WO2019/230291, PCT Pub. Date Dec. 5, 2019.
Claims priority of application No. 2018-102726 (JP), filed on May 29, 2018.
Prior Publication US 2021/0211275 A1, Jul. 8, 2021
Int. Cl. H04L 9/40 (2022.01); H04L 9/08 (2006.01); H04L 9/30 (2006.01)
CPC H04L 9/085 (2013.01) [H04L 9/0825 (2013.01); H04L 9/0827 (2013.01); H04L 9/3066 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A computer-implemented method for sharing keys for data security, the method comprising:
retrieving a first secret key and a second secret key, wherein the first secret key and the second secret key are distinct;
determining, based on a pairing computation, a first shared value using the first secret key as a first input;
transmitting an instruction causing a delegation server to generate, based on the pairing computation, a second shared value using the second secret key as a second input, wherein the second shared value is distinct from the first shared value;
receiving the second shared value during a first authenticated key sharing session;
generating, based on the first shared value and the second shared value, a shared key for an encrypted data communication during a second authenticated key sharing session according to an authentication key sharing protocol, wherein the second authenticated key sharing session is distinct from the first authenticated key sharing session; and
causing, using the shared key, the encrypted data communication over a network according to the second authenticated key sharing session.