The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Oct. 12, 2010
Filed:
Mar. 16, 2005
Yoshinori Sato, Sagamihara, JP;
Toyohisa Morita, Tokyo, JP;
Hideyuki Maki, Kamakura, JP;
Takashi Fukumoto, Sagamihara, JP;
Yoshinori Sato, Sagamihara, JP;
Toyohisa Morita, Tokyo, JP;
Hideyuki Maki, Kamakura, JP;
Takashi Fukumoto, Sagamihara, JP;
Hitachi, Ltd., Tokyo, JP;
Abstract
In the conventional technique for mainly performing access control, an entity (an individual) which provides information cannot grasp a state of use of personal information. In the conventional technique for encrypting stored data, a decryption key is always required when personal data is used and the personal data is not protected once decrypted. The invention constitute a system such that a purchase history is collected according to an anonymous ID and a response from a member card or an agent server is required for operation for associating the anonymous ID with a personal ID. Personal data itself is not encrypted but stored in a plain text with the personal ID and the anonymous ID as keys such that the anonymous ID is regenerated every time the anonymous ID is associated with the personal ID on a server side. At this point, the anonymous ID serving as a collection key for the purchase history, which is accumulated concurrently, is also regenerated.