Title:
【発明の名称】所属認証方式
Document Type and Number:
Japanese Patent JP2973203
Kind Code:
B2
Abstract:
PURPOSE:To perform belonging position certification while keeping privacy by providing a center with a prime number generator, a GCD calculator, a multiplier, a reciprocal number calculator, a power calculator, and a signature inspection device, and equipping a group manager with a signature device and a user with a random number generator, a power calculator, a multiplier, and a divider. CONSTITUTION:The center 100 uses the prime number generator 110, CGD calculator 120, and multiplier 130 to generate secret keys and open keys, controls the secret keys, and distributes the open keys to users and certifying persons. A user 300 calculates a value (c) obtained by randomizing secret information W with a random number by using the random number generator 310, power calculator 320, and multiplier 330. The group manager 200 signs on the value (c) with the signature device 210. The user sends the value (c) and signature to the center. The center inspects the signature with the inspection device 135 and calculates a value (d) with a secret key corresponding to the group by using the reciprocal number computer 140 and power calculator 150. The user 300 calculates the secret information from the open key and value (d). When the user proves the position in the group, the secret key is used to prove open information and secret information holding to the centifying person.
Inventors:
OOTA KAZUO
OKAMOTO TATSUAKI
OKAMOTO TATSUAKI
Application Number:
JP20280189A
Publication Date:
November 08, 1999
Filing Date:
August 07, 1989
Export Citation:
Assignee:
NIPPON DENSHIN DENWA KK
International Classes:
G06F21/31; G06F15/00; G09C1/00; H04L9/00; H04L9/08; H04L9/32; (IPC1-7): H04L9/08; G09C1/00; H04L9/32
Other References:
Ｋａｚｕｏ ＯＨＴＡ，Ｔａｔｓｕａｋｉ ＯＫＡＭＯＴＯ，”Ｍｅｍｂｅｒｓｈｉｐ Ａｕｔｈｅｎｔｉｃａｔｉｏｎ ｆｏｒ Ｈｉｅｒａｒｃｈｉｃａｌ Ｍｕｌｔｉｇｒｏｕｐｓ Ｕｓｉｎｇ ａ Ｍａｓｔｅｒ Ｓｅｃｒｅｔ Ｋｅｙ”，ｔｈｅ Ｔｒａｎｓａｃｔｉｏｎｓ ｏｆ ｔｈｅ ＩＥＩＣＥ，Ｖｏｌ．Ｅ７３，Ｎｏ．７，（１９９０），ｐ．１１０７−１１１０
Ｋａｚｕｏ ＯＨＴＡ，Ｔａｔｓｕａｋｉ ＯＫＡＭＯＴＯ，Ｋｅｎｊｉ ＫＯＹＡＭＡ，”Ｍｅｍｂｅｒｓｈｉｐ Ａｕｔｈｅｎｔｉｃａｔｉｏｎ ｆｏｒ Ｈｉｅｒａｒｃｈｉｃａｌ Ｍｕｌｔｉｇｒｏｕｐｓ Ｕｓｉｎｇ ｔｈｅ Ｅｘｔｅｎｄｅｄ Ｆｉａｔ−Ｓｈａｍｉｒ Ｓｃｈｅｍｅ”，Ｌｅｃｔｕｒｅ Ｎｏｔｅｓ ｉｎ Ｃｏｍｐｕｔｅｒ Ｓｃｉｅｎｃｅ，Ｖｏｌ．４７３，（１９９１），ｐ４４６−４５７
岡本龍明，太田和夫“拡張Ｆｉａｔ−Ｓｈａｍｉｒ法を用いた階層的複数所属認証の実現法”，１９８９年電子情報通信学会秋季全国大会講演論文集 分冊１，（１９８９年８月２４日受入），ｐ．１−２１６〜１−２１７（ＳＡ−８−５）
Ｋａｚｕｏ ＯＨＴＡ，Ｔａｔｓｕａｋｉ ＯＫＡＭＯＴＯ，Ｋｅｎｊｉ ＫＯＹＡＭＡ，”Ｍｅｍｂｅｒｓｈｉｐ Ａｕｔｈｅｎｔｉｃａｔｉｏｎ ｆｏｒ Ｈｉｅｒａｒｃｈｉｃａｌ Ｍｕｌｔｉｇｒｏｕｐｓ Ｕｓｉｎｇ ｔｈｅ Ｅｘｔｅｎｄｅｄ Ｆｉａｔ−Ｓｈａｍｉｒ Ｓｃｈｅｍｅ”，Ｌｅｃｔｕｒｅ Ｎｏｔｅｓ ｉｎ Ｃｏｍｐｕｔｅｒ Ｓｃｉｅｎｃｅ，Ｖｏｌ．４７３，（１９９１），ｐ４４６−４５７
岡本龍明，太田和夫“拡張Ｆｉａｔ−Ｓｈａｍｉｒ法を用いた階層的複数所属認証の実現法”，１９８９年電子情報通信学会秋季全国大会講演論文集 分冊１，（１９８９年８月２４日受入），ｐ．１−２１６〜１−２１７（ＳＡ−８−５）
Attorney, Agent or Firm:
Keiichi Yamamoto