Title:
【発明の名称】公開鍵暗号・認証方式
Document Type and Number:
Japanese Patent JP2904818
Kind Code:
B2
Abstract:
PURPOSE:To eliminate the need for accessing a center every time a user generates an open public key and a secret key in pairs newly by using secret information acquired in advance from a center and random number information generated newly and allowing the user itself to generate a certificate to the open public key. CONSTITUTION:The center 1 of the system opens a public key in common between users, generates secret information Si stored in each user (i) from identification information IDi of the user (i) and secret information known by the center 1 only and delivers the resulting information to each user secretly. The user (i) generates an optional open public key E and a secret key in pairs and uses the secret information Si delivered in secrecy from the center 1 to verify it to the communication opposite party that the open public key E is warranted by the user of the identification information IDi and then uses the open public key E and the secret key to apply the open public key cryptography, key delivery and verification communication to the communication opposite party. Thus, it is not required for the user to access newly the center even when the open public key E and the secret key in pairs are generated and utilized.
Inventors:
OKAMOTO TATSUAKI
OOTA KAZUO
OOTA KAZUO
Application Number:
JP21886489A
Publication Date:
June 14, 1999
Filing Date:
August 25, 1989
Export Citation:
Assignee:
NIPPON DENSHIN DENWA KK
International Classes:
G09C1/00; H04L9/06; H04L9/08; H04L9/14; H04L9/32; (IPC1-7): H04L9/32; G09C1/00; H04L9/08
Domestic Patent References:
| JP382240A | ||||
| JP612445A | ||||
| JP6172436A | ||||
| JP6130827A |
Other References:
田中 初一，”ＩＤ情報に基づく相互通信なしの共通鍵生成”，電子情報通信学会技術研究報告（ＩＳＥＣ８８−１１〜１９）Ｖｏｌ．８８，Ｎｏ．２０７，（１９８８．９．２７）ｐ．３１〜３４
Attorney, Agent or Firm:
Makoto Suzuki