Multi-party secure authentication system, authentication server, intermediate server, multi-party secure authentication method, and program

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United States of America Patent

PATENT NO 9992190
APP PUB NO 20160197906A1
SERIAL NO

14910808

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Importance

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Abstract

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Even when an intermediate server exists, a plurality of servers simultaneously authenticates a user securely. A user apparatus disperses a password. The user apparatus obtains a ciphertext, which is obtained by encrypting a dispersed value. The intermediate server transmits the ciphertext to an authentication server. The authentication server decrypts the ciphertext to obtain the dispersed value. The authentication server determines a verification value. The authentication server obtains a ciphertext. The intermediate server decrypts the ciphertext to obtain the verification value. The intermediate server verifies whether a sum total of the verification values is equal to 0 or not. The authentication server determines a verification value. The authentication server obtains a ciphertext. The authentication server decrypts the ciphertext to obtain the verification value. The authentication server verifies whether a sum total of the verification values is equal to 0 or not.

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Patent Owner(s)

  • NIPPON TELEGRAPH AND TELEPHONE CORPORATION

International Classification(s)

Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Chida, Koji Musashino, JP 38 201
Hamada, Koki Musashino, JP 80 267
Ikarashi, Dai Musashino, JP 82 231
Kikuchi, Ryo Musashino, JP 62 408

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