Panasonic Corporation

Tohoku University

Denso Corporation

Hirosaki University

Masao Sakai

Shingo Hasegawa

Eisuke Koizumi

Shuji Isobe

Natsume Matsuzaki

Yuichi Futa

Hiroki Shizuya

Yuji Unagami

Manabu Maeda

Masao Nonaka

Kaoru Yokota

Junya Iwazaki

Noriyasu Homma

Yoshihiro Takai

Marika Minagawa

Masayuki Fukumitsu

Masaki Yoshida

Makoto Yoshizawa

Kei Ichiji

Makoto Carlos Miyauchi

Makoto Abe

Tsuneo Nakata

Norihiro Sugita

Daiki Takahashi

Naoki Iwata

Xiaoyong Zhang

Naoki Shibusawa

Masashi Hisai

Haruna Endo

An information intermediating apparatus in an information transaction system including an information providing apparatus, an information acquiring apparatus and the information intermediating apparatus connected to a communication network, includes: a first receiver that receives second information, of first and second information necessary for restoring transaction object information, and first feature information indicating a feature of the first information; a second receiver that receives second feature information from the information acquiring apparatus, the second feature information being calculated from the first information transmitted to the information acquiring apparatus from the information providing apparatus; a feature information determination unit that determines whether an identity is present between the first feature information and the second feature information; and a transmitter that transmits the second information to the information acquiring apparatus, when the feature information determination unit determines that the identity is present between the first feature information and the second feature information.

Information intermediating apparatus, information providing apparatus, and information acquiring apparatus

An information processing systemcomprising at least one first node, second nodesfor providing a public key change assistance service, and a blockchain, wherein the first nodecomprises a new public key creation unit, a second node group selection unit, an old and new key information request unit, a draft contract preparation unit, a signature request unit, a first signature execution unit, and a registration unit; each second nodecomprises an old and new key information transmission unit, a second signature execution unit, and a draft contract return unit; the draft contract preparation unitrandomly determines the order of new public keys as transmission destinations; and the signature request unitand the first signature execution unitperform signature request and execution, respectively, so that the order of the nodes that sign a draft transaction contract is random.

Information processing system, method for changing public key, program, and method for building information processing system

An information processing systemincludes a client nodeand an issuing nodefor issuing a coupon having terms of use Q. The client nodeincludes a use request unitthat requests to use the coupon by presenting user data D held by a user of the client node. The issuing nodeincludes: a use request verification unitfor verifying whether the information included in the user data D satisfies the terms of use Qupon the use request from the use request unit; and a use authorization unitthat authorizes the client nodeto use the coupon when the information satisfies the terms of use Q

Information processing system, method for providing service data, and method for building information processing system

An information processing system including multiple memory devices and a processor configured to select one node group associated with a time point included in a time period between a current time point and a time point before a predetermined time including the current time point among multiple node groups each associated with one of multiple time points, and store the N pieces of distributed data one to each of N memory devices included in the selected node group. The information processing system carries out a restoring process on at least one of the multiple node groups, and if the restoring results in failure, carries out the restoring process on a second node group associated with a time point before a time point associated with the first node group that causes the failure among the plurality of node groups.

Information processing system, information processing apparatus, method for information processing, and non-transitory computer-readable recording medium having stored therein information processing program

An image processing device includes: an acquisition unit that acquires a probability distribution of luminance of a pixel in a plurality of perspective images including the luminance of the pixel which is superposition of luminance components resulting from respective objects, based on an occurrence frequency of a perspective image in which the luminance of the pixel has respective values of a plurality of values; a distribution estimation unit that estimates a mixture distribution indicating the acquired probability distribution; a component estimation unit that estimates a component corresponding to a smallest expectation value distribution of which an expectation value is the smallest among a plurality of partial distributions that form the estimated mixture distribution, and forming at least a portion of the luminance of the pixel; a removal unit that removes the estimated component from the luminance of the pixel included in the perspective image.

Image processing device, image processing method, and non-transitory computer-readable recording medium having stored therein image processing program

To aim provide a software update apparatus including an install module group composed of a plurality of install modules. Each of the install modules has a function of receiving, from an external server, a replacement protection control module to be used for updating a protection control module having a function of verifying whether a predetermined application has been tampered with. Each of the install modules simultaneously running is verified by at least another one of the install modules simultaneously running, as to whether the install module has a possibility of performing malicious operations. If any of the install modules is verified as having the possibility of performing the malicious operations, any another one of the install modules that is verified as not having the possibility revokes the any install module verified as having the possibility.

Software updating apparatus, software updating system, invalidation method, and invalidation program

A distributing device for generating private information correctly even if shared information is destroyed or tampered with. A shared information distributing device for use in a system for managing private information by a secret sharing method, including: segmenting unit that segments private information into a first through an npieces of shared information; first distribution unit that distributes the n pieces of shared information to n holding devices on a one-to-one basis; and second distribution unit that distributes the n pieces of shared information to the n holding devices so that each holding device holds an ipiece of shared information distributed by the first distribution unit, as well as a pieces of shared information being different from the ipiece of shared information in ordinal position among n pieces of shared information, 'i' being an integer in a range from 1 to n.

Shared information distributing device, holding device, certificate authority device, and system

A signal-processing device, which processes transparent images each expressed by transparent superimposition of a target such as an affected part and a background, includes a transparent image acquiring unit that acquires the transparent images each including the target at a plurality of times; a calculating unit that calculates a component of the transparent image originating from the target and a component of the transparent image originating from the background at a given time t among the plurality of times in association with estimated values of at least one of a distribution originating from the target and a distribution originating from the background and that evaluates consistency with the transparent images; and an updating unit that updates the estimated values of at least one of a distribution originating from the target and a distribution originating from the background at the time t based on the evaluation result.

Signal-processing device and computer-readable recording medium with signal-processing program recorded thereon

Provided is a tampering monitoring system that can identify a monitoring module that has been tampered with among a plurality of monitoring modules. A management apparatus is provided with an acquisition unit that acquires a new monitoring module that has not been tampered with, a generation unit that generates a decoy monitoring module by modifying the acquired monitoring module, a transmission unit that transmits the decoy monitoring module to the information security device and causes the information security device to install the decoy monitoring module therein, a reception unit that receives from the information security device, after the decoy monitoring module has been installed, monitoring results generated by the monitoring modules monitoring other monitoring modules, and a determination unit that identifies, by referring to the received monitoring results, a monitoring module that determines the decoy monitoring module to be valid and determines the identified monitoring module to be invalid.

Tampering monitoring system, control device, and tampering control method

A certain component of an input time series signal (hereinafter referred to as input) is assumed as a cycle time-variable time series signal and a prediction model for predicting a value of the input after the predetermined time is produced, and the value of the input after the predetermined time is predicted and outputted using the prediction model.

Signal processing for predicting an input time series signal and application thereof to predict position of an affected area during radiotherapy

To aim to provide a monitoring system and a program execution apparatus that are capable of maintaining the security intensity even in the case where an unauthentic install module is invalidated. Install modules included in an apparatus each monitor an install module, which is a monitoring target indicated by a monitoring pattern included therein, as to whether the install module performs malicious operations. An install module that performs malicious operations is invalidated in accordance with an instruction from an update server. The monitoring patterns are restructured by the update server such that the install modules except the invalidated install module are each monitored by at least another one of the install modules. The restructured monitoring patterns are distributed to the install modules except the invalidated install module.

Monitoring system, program-executing device, monitoring program, recording medium and integrated circuit

A management device detects whether any normal monitoring module that has not been tampered with exists by referring to monitoring results received from an information security device and selects, when existence is detected, one of the monitoring modules and assumes that the selected monitoring module has been tampered with. The monitoring device then successively applies a procedure to monitoring modules other than the selected monitoring module by referring to the monitoring results, starting from the selected monitoring module, the procedure being to assume that any monitoring module determining that a monitoring module assumed to have been tampered with is normal has also been tampered with. As a result of the procedure, when all of the monitoring modules are assumed to have been tampered with the management device determines the selected monitoring module to be a normal monitoring module that has not been tampered with.

An information security apparatus includes a plurality of monitoring modules that monitor for tampering. A management apparatus includes a reception unit that receives a plurality of monitoring results each generated by a source monitoring module monitoring a target monitoring module; a detection unit that detects an abnormality by referring to fewer than all of the received monitoring results; and an identification unit that identifies, when an abnormality is detected, a monitoring module that has been tampered with from among (i) a monitoring module that generates a monitoring result related to the abnormality, and (ii) one or more monitoring modules identified by tracing back through a chain of monitoring modules consecutively from the target of monitoring to the source of monitoring, starting from the monitoring module that generates the monitoring result related to the abnormality.

Tampering monitoring system, management apparatus, and management method

The present invention aims to perform tamper detection on a protection control module without having detection modules come to know the key data and functions thereof. The detection modules of the present invention perform tamper detection by verifying whether or not the correspondence between the input and output data of the application decryption process performed by the protection control module is correct. Furthermore, the present invention offers improved security against leaks of the application output data by the detection modules by having a plurality of detection modules verify different data blocks.

Growing community of inventors

Miyagi, Japan

Masao Sakai