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:
Mar. 10, 2015
Filed:
Mar. 03, 2009
Masahito Yamazaki, Yokohama, JP;
Masahito Yamazaki, Yokohama, JP;
Canon Kabushiki Kaisha, Tokyo, JP;
Abstract
To prevent falsification of an attribute of data, a mechanism is provided, which encrypt document/image data while holding the attribute contained in electronic document data as a plain text and make it extremely difficult to decrypt the document/image data if the attribute is falsified. A transmitter receives a public key set including a plurality of public keys from a receiver, encrypts the document/image data using a common key, selects a public key from the public key set based on an attribute of the data, encrypts the common key using the selected public key, and transmits the data including the encrypted document/image data, the encrypted common key, and the attribute to the receiver.