Class / Patent application number | Description | Number of patent applications / Date published |
380055000 | HAVING PRODUCTION OF PRINTED COPY (E.G., CRYPTOGRAPHIC PRINTER OR TYPEWRITER) | 6 |
20080240430 | Graphic Code Application Apparatus and Method - A machine readable code comprises at least a portion of a graphical indicium, the graphical indicium comprising a random arrangement of spots. At least some of the spots comprising the graphical indicium may have a dimension of less than one micrometre. The spots comprising the graphical indicium may vary in size and/or shape. The portion of the graphical indicium comprising the code may be delimited by a boundary, the boundary may be a temporary boundary which may be generated by a reading machine relative to a fixed trigger point only when the code is being read. Alternatively, the portion of the graphical indicium comprising the code may be delimited by a graphically represented boundary. | 10-02-2008 |
20090141892 | SECURITY PRINTING METHOD AND SYSTEM FOR ENHANCING SECURITY PRINTING - A security printing method includes generating a security file having a plurality of metadata fields and an information field concatenated together in an initial sequence. A security file identification is generated from the plurality of metadata fields and the information field. The security file identification corresponds to the initial sequence and is a one-way function of the plurality of metadata fields and the information field. The method further includes selecting a custom scrambling technique based on the security file identification, and scrambling the initial sequence using the selected custom scrambling technique, thereby creating a scrambled sequence of the plurality of metadata field and the information field. | 06-04-2009 |
20090220077 | UNIT USING OPERATING SYSTEM AND IMAGE FORMING APPARATUS USING THE SAME - A chip mountable on a customer replaceable unit monitoring memory (CRUM) unit used in an image forming job includes a central processing unit (CPU) with an operating system (OS) thereof, which is separate from an OS of the image forming apparatus, to perform at least one of authentication and cryptographic data communication with a main body of an image forming apparatus by executing one cryptographic algorithm corresponding to a set state from among a plurality of pre-provided cryptographic algorithms, using the OS thereof. The security of a unit on which the chip is mounted can thereby be reinforced and random changes of data of the unit can be prevented. | 09-03-2009 |
20090257586 | Image processing apparatus and image processing method - An image processing apparatus sections an image to be processed into a plurality of blocks, rearranges the blocks into positions specified by an encryption key that uniquely specifies the positions of the blocks in the image, determines a computing method used to convert pixel values of pixels that form a minimum area included in each of the blocks after the blocks are rearranged based on the pixel values of predetermined pixels that do not belong to the minimum area, and converts the pixel values based on the computing method. | 10-15-2009 |
20100067691 | Document certification and authentication system - This invention safeguards the integrity of a machine-printed paper document by entangling a characteristic signature derived from the document's paper grain structure with the identities of the printing device and the person or organization which issued the document. This protection is achieved using a certification phase performed by an augmented document printer and an authentication phase performed by an augmented document scanner. In the certification phase, the grain structure of a specific area of the original paper is imaged and processed to generate a unique signature for the paper. This signature is doubly encrypted using the private keys of the augmented printer and the certifier. These encryption steps entangle the signature of the paper with its source information in a way that thwarts counterfeiting attacks which either copy the document or falsely attribute its source to a specific printer and/or certifier. | 03-18-2010 |
20140185800 | SECURE PRINTING BETWEEN PRINTER AND PRINT CLIENT DEVICE - Systems and methods of operating a computing system may involve securely printing a print document sent from a client device to a target printer. In one example, the method may include verifying an operating environment of the target printer and generating a plurality of security keys to implement asymmetric encryption of the print document. | 07-03-2014 |