US 12,395,322 B2
Encryption apparatus, cypher communication system, encryption method and program
Mana Ueno, Tokyo (JP); Tetsutaro Kobayashi, Tokyo (JP); and Keizo Murakami, Tokyo (JP)
Assigned to NIPPON TELEGRAPH AND TELEPHONE CORPORATION, Tokyo (JP)
Appl. No. 18/258,932
Filed by NIPPON TELEGRAPH AND TELEPHONE CORPORATION, Tokyo (JP)
PCT Filed Jan. 14, 2021, PCT No. PCT/JP2021/001112
§ 371(c)(1), (2) Date Jun. 22, 2023,
PCT Pub. No. WO2022/153456, PCT Pub. Date Jul. 21, 2022.
Prior Publication US 2024/0048362 A1, Feb. 8, 2024
Int. Cl. H04L 9/08 (2006.01)
CPC H04L 9/0825 (2013.01) [H04L 9/0844 (2013.01); H04L 9/0894 (2013.01)] 7 Claims
OG exemplary drawing
 
1. An encryption apparatus comprising:
a memory; and
a processor configured to execute:
storing a secret key and a public key of public key encryption, and
encrypting communication data by using the secret key and the public key,
wherein the encrypting includes encrypting the communication data by using a preliminary calculation table generated by a device different from the encryption apparatus, said device different from the encryption apparatus being connected with the encryption apparatus via network, said encrypting includes encrypting the communication data by KH-PKE, and
wherein the processor is configured to encrypt the communication data using a preliminary calculation table that includes a plurality of values that are preliminarily generated based on a system parameter corresponding to another apparatus that communicates with the encryption apparatus.