Patent application number | Description | Published |
20110078459 | SIGNATURE GENERATING DEVICE AND METHOD, SIGNATURE VERIFYING DEVICE AND METHOD, AND COMPUTER PRODUCT - A signature generating device includes a receiving unit that receives a sequence of data; a summary data generating unit that generates summary data of the data upon reception of each of the data by the receiving unit; an obtaining unit that obtains, when the number of data included in a sequence of the generated summary data reaches a given number, the sequence of the summary data as a block; a setting unit that sets, as a signature subject, a current block constituted by the sequence of the summary data, and the summary data selected from at least one block contiguous to the current block; a digital signature generating unit that generates a digital signature concerning data summarized for the current block; and a sending unit that sends the generated digital signature, the signature subject associated with the digital signature, and the data summarized for the current block. | 03-31-2011 |
20110302419 | IMAGE MANAGING METHOD AND IMAGE MANAGING SYSTEM - An image managing method includes dividing the original moving image into a header and a body and generating the group hash value of the header portion, generating the hash value of each item of still image data, connecting the group hash value of the header portion and the hash value of each item of still image data to generate connected hash values, generating a group of the connected hash values as a hash value list, generating the hash value of a Huffman table on the basis of cutting out one still image, and signing to generate signature information of the original moving image, using the group hash value of the header portion, the hash value of the Huffman table, and the hash list as verification data of the original moving image, by adding a digital signature of a video recording terminal to it. | 12-08-2011 |
20110314291 | Digital signature program, digital signature apparatus, and digital signature method - When input data (f | 12-22-2011 |
20120317420 | ELECTRONIC SIGNATURE DEVICE AND ELECTRONIC SIGNATURE METHOD - An electronic signature device includes a processor configured to internally execute signature generation processing of generating an electronic signature for a digital data string; and an output unit configured to output the digital data string and the generated electronic signature. | 12-13-2012 |
Patent application number | Description | Published |
20110019047 | SOLID-STATE IMAGING DEVICE AND CAMERA SYSTEM - A solid-state imaging device includes: a pixel unit in which plural pixels that perform photoelectric conversion are arrayed in a matrix shape; and a pixel-signal readout unit that performs readout of pixel signals from the pixel unit in a unit of plural pixels, the pixel-signal readout unit including an AD conversion unit that performs analog-digital (AD) conversion, wherein the pixel-signal readout unit includes plural comparators that compare a reference signal as a ramp wave and readout analog signal potentials of the pixels in rows in which the comparators are provided, plural counter latches that are arranged to correspond to the plural comparators and capable of counting comparison times of the comparators corresponding thereto, stop the count when outputs of the comparators are inverted, and store values of the count, and an adjusting unit that performs offset adjustment for the reference signal every time the AD conversion is performed. | 01-27-2011 |
20120019697 | Solid-state imaging device and camera system - A solid-state imaging device includes: a pixel section in which pixels performing photoelectric conversion are arranged in a matrix shape; and a pixel signal reading section that has an AD conversion section which reads pixel signals through pixel units from the pixel section and performs analog digital (AD) conversion. The pixel signal reading section includes comparators each of which compares a reference signal, which is a ramp wave, with read analog signal potentials of pixels in a corresponding column, counter latches each of which is disposed to correspond to each of the comparators, is able to count a comparison time of the corresponding comparator, stops the count when an output of the corresponding comparator is inverted, and retains a corresponding count value, and an adjustment section that performs offset adjustment on the reference signal for each row on which the AD conversion is performed. | 01-26-2012 |