Patents by Inventor Shigetomo Tamai
Shigetomo Tamai has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
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Patent number: 8875264Abstract: Provided is an off-line two-factor user authentication system. The off-line two-factor user authentication system is designed to use, as a password, a one-time-password derivation rule to be applied to certain pattern elements included in a presentation pattern at specific positions so as to create a one-time password, and further use, as a second authentication factor, information identifying a client to be used by a user. A plurality of pattern seed values each adapted to uniquely specify a presentation pattern in combination with a client ID, and a plurality of verification codes corresponding to respective ones of the pattern seed values, are stored in an off-line two-factor authentication client. A presentation pattern is created based on a selected one of the pattern seed values and a client ID, and an entered one-time password is verified based on a verification code corresponding to the selected pattern seed value.Type: GrantFiled: October 5, 2010Date of Patent: October 28, 2014Assignee: CSE Co., Ltd.Inventors: Shigetomo Tamai, Toru Takano, Tsuyoshi Kobayashi
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Patent number: 8752147Abstract: Provided is a two-actor user authentication system with a reduced risk of leakage of authentication information. The two-factor user authentication system is designed to use, as a password, a one-time-password derivation rule to be applied to certain pattern elements included in a presentation pattern at specific positions so as to create a one-time password, and further use, as a second authentication factor, information identifying a client to be used by a user. An authentication server is operable to generate a pattern seed value adapted to uniquely specify a presentation pattern in combination with a client ID, and transmit the pattern seed value to an authentication-requesting client. The authentication-requesting client is operable to create a presentation pattern based on a client ID acquired therefrom, and display the presentation pattern to allow a user to enter thereinto a one-time password based on the presentation pattern.Type: GrantFiled: October 5, 2010Date of Patent: June 10, 2014Assignee: CSE Co., LtdInventors: Shigetomo Tamai, Toru Takano, Tsuyoshi Kobayashi
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Publication number: 20130185778Abstract: Provided is an off-line two-factor user authentication system with a reduced risk of leakage of authentication information. The two-factor user authentication system is designed to use, as a password, a one-time-password derivation rule to be applied to certain pattern elements included in a presentation pattern at specific positions so as to create a one-time password, and further use, as a second authentication factor, information identifying a client to be used by a user. A plurality of pattern seed values each adapted to uniquely specify a presentation pattern in combination with a client ID, and a plurality of verification codes corresponding to respective ones of the pattern seed values, are stored in an off-line two-factor authentication client. A presentation pattern is created based on a selected one of the pattern seed values and a client ID, and an entered one-time password is verified based on a verification code corresponding to the selected pattern seed value.Type: ApplicationFiled: October 5, 2010Publication date: July 18, 2013Inventors: Shigetomo Tamai, Toru Takano, Tsuyoshi Kobayashi
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Publication number: 20130185779Abstract: Provided is a two-actor user authentication system with a reduced risk of leakage of authentication information. The two-factor user authentication system is designed to use, as a password, a one-time-password derivation rule to be applied to certain pattern elements included in a presentation pattern at specific positions so as to create a one-time password, and further use, as a second authentication factor, information identifying a client to be used by a user. An authentication server is operable to generate a pattern seed value adapted to uniquely specify a presentation pattern in combination with a client ID, and transmit the pattern seed value to an authentication-requesting client. The authentication-requesting client is operable to create a presentation pattern based on a client ID acquired therefrom, and display the presentation pattern to allow a user to enter thereinto a one-time password based on the presentation pattern.Type: ApplicationFiled: October 5, 2010Publication date: July 18, 2013Inventors: Shigetomo Tamai, Toru Takano, Tsuyoshi Kobayashi
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Patent number: 8209746Abstract: It is intended to achieve a user authentication system capable of forcibly presenting a content to a user. Provided is a content presentation-type authentication system designed to allow a client to perform a content presentation-type user authentication in which user authentication is performed in such a manner that a plurality of pattern elements arranged in a given pattern are presented as a presentation pattern to a user who intends to be authenticated, and a one-time password derivation rule is used as a password of the user and applied to certain ones of the pattern elements located at specific positions in the presentation pattern to create a one-time password, and a content is forcibly presented to the user in connection with the user authentication.Type: GrantFiled: December 30, 2010Date of Patent: June 26, 2012Assignee: Computer Systems Engineering Co., Ltd.Inventors: Shigetomo Tamai, Toru Takano, Shigeo Akutsu
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Publication number: 20110202981Abstract: It is intended to achieve a user authentication system capable of forcibly presenting a content to a user. Provided is a content presentation-type authentication system designed to allow a client to perform a content presentation-type user authentication in which user authentication is performed in such a manner that a plurality of pattern elements arranged in a given pattern are presented as a presentation pattern to a user who intends to be authenticated, and a one-time password derivation rule is used as a password of the user and applied to certain ones of the pattern elements located at specific positions in the presentation pattern to create a one-time password, and a content is forcibly presented to the user in connection with the user authentication.Type: ApplicationFiled: December 30, 2010Publication date: August 18, 2011Inventors: Shigetomo Tamai, Toru Takano, Shigeo Akutsu
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Patent number: 7984491Abstract: Disclosed is an off-line user authentication system, which is designed to present a presentation pattern to a user subject to authentication, and apply a one-time-password derivation rule serving as a password to certain pattern elements included in the presentation pattern at specific positions so as to create a one-time password. An off-line authentication client pre-stores a plurality of pattern element sequences each adapted to form a presentation pattern, and a plurality of verification codes created by applying a one-time-password derivation rule to the respective presentation patterns and subjecting the obtained results to a one-way function algorithm. A presentation pattern is created using one selected from the stored pattern element sequences, and presented to a user. A one-time password entered from the user is verified based on a corresponding verification code to perform user authentication. The present invention provides an off-line matrix authentication scheme with enhanced security.Type: GrantFiled: October 16, 2009Date of Patent: July 19, 2011Assignee: Computer Systems Engineering Co., Ltd.Inventors: Yukiya Ueda, Tsugune Saito, Shigetomo Tamai
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Patent number: 7945948Abstract: Disclosed is an off-line user authentication system, which is designed to present a presentation pattern to a user subject to authentication, and apply a one-time-password derivation rule serving as a password to certain pattern elements included in the presentation pattern at specific positions so as to create a one-time password. An off-line authentication client pre-stores a plurality of pattern element sequences each adapted to form a presentation pattern, and a plurality of verification codes created by applying a one-time-password derivation rule to the respective presentation patterns and subjecting the obtained results to a one-way function algorism. A presentation pattern is created using one selected from the stored pattern element sequences, and presented to a user. A one-time password entered from the user is verified based on a corresponding verification code to perform user authentication. The present invention provides an off-line matrix authentication scheme with enhanced security.Type: GrantFiled: June 9, 2006Date of Patent: May 17, 2011Assignee: Computer Systems Engineering Co., Ltd.Inventors: Yukiya Ueda, Tsugune Saito, Shigetomo Tamai
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Publication number: 20100043063Abstract: Disclosed is an off-line user authentication system, which is designed to present a presentation pattern to a user subject to authentication, and apply a one-time-password derivation rule serving as a password to certain pattern elements included in the presentation pattern at specific positions so as to create a one-time password. An off-line authentication client pre-stores a plurality of pattern element sequences each adapted to form a presentation pattern, and a plurality of verification codes created by applying a one-time-password derivation rule to the respective presentation patterns and subjecting the obtained results to a one-way function algorism. A presentation pattern is created using one selected from the stored pattern element sequences, and presented to a user. A one-time password entered from the user is verified based on a corresponding verification code to perform user authentication. The present invention provides an off-line matrix authentication scheme with enhanced security.Type: ApplicationFiled: October 16, 2009Publication date: February 18, 2010Inventors: Yukiya Ueda, Tsugune Saito, Shigetomo Tamai
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Patent number: 7409705Abstract: Disclosed is a user authentication system, which is designed to present a presentation pattern to a user subject to authentication, and apply a one-time-password derivation rule serving as a password of the user to certain pattern elements included in the presentation pattern at specific positions so as to create a one-time password. An authentication server is operable to generate a pattern seed value adapted to be combined with a user ID so as to allow a presentation pattern to be uniquely determined, and transmit the generated pattern seed value to an authentication-requesting client. The authentication-requesting client is operable to display a presentation pattern created based on an entered user ID and the received pattern seed value and in accordance with a given pattern-element-sequence creation rule, so as to allow the user to enter therein a one-time password, and transmit the entered one-time password to the authentication server.Type: GrantFiled: June 9, 2006Date of Patent: August 5, 2008Assignee: Computer Systems Engineering Co., Ltd.Inventors: Yukiya Ueda, Tsugune Saito, Shigetomo Tamai
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Publication number: 20070234063Abstract: Disclosed is an off-line user authentication system, which is designed to present a presentation pattern to a user subject to authentication, and apply a one-time-password derivation rule serving as a password to certain pattern elements included in the presentation pattern at specific positions so as to create a one-time password. An off-line authentication client pre-stores a plurality of pattern element sequences each adapted to form a presentation pattern, and a plurality of verification codes created by applying a one-time-password derivation rule to the respective presentation patterns and subjecting the obtained results to a one-way function algorism. A presentation pattern is created using one selected from the stored pattern element sequences, and presented to a user. A one-time password entered from the user is verified based on a corresponding verification code to perform user authentication. The present invention provides an off-line matrix authentication scheme with enhanced security.Type: ApplicationFiled: June 9, 2006Publication date: October 4, 2007Inventors: Yukiya Ueda, Tsugune Saito, Shigetomo Tamai
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Publication number: 20070226784Abstract: Disclosed is a user authentication system, which is designed to present a presentation pattern to a user subject to authentication, and apply a one-time-password derivation rule serving as a password of the user to certain pattern elements included in the presentation pattern at specific positions so as to create a one-time password. An authentication server is operable to generate a pattern seed value adapted to be combined with a user ID so as to allow a presentation pattern to be uniquely determined, and transmit the generated pattern seed value to an authentication-requesting client. The authentication-requesting client is operable to display a presentation pattern created based on an entered user ID and the received pattern seed value and in accordance with a given pattern-element-sequence creation rule, so as to allow the user to enter therein a one-time password, and transmit the entered one-time password to the authentication server.Type: ApplicationFiled: June 9, 2006Publication date: September 27, 2007Inventors: Yukiya Ueda, Tsugune Saito, Shigetomo Tamai