Panasonic Corporation

Tohoku University

Denso Corporation

Shingo Hasegawa

Shuji Isobe

Yuichi Futa

Hiroki Shizuya

Masao Sakai

Eisuke Koizumi

Natsume Matsuzaki

Yuji Unagami

Manabu Maeda

Masao Nonaka

Kaoru Yokota

Motoji Ohmori

Junya Iwazaki

Marika Minagawa

Masayuki Fukumitsu

Masaki Yoshida

Makoto Carlos Miyauchi

Tsuneo Nakata

Daiki Takahashi

Naoki Iwata

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 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

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

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

Tampering monitoring system can detect whether protection control module is tampered with even if some of detection modules are tampered with. Tampering monitoring system includes protection control module detection modules, and management device. Protection control module includes: generation unit generating d pieces of distribution data from computer program, n and d being positive integers, d smaller than n; selection unit selecting d detection modules; and distribution unit distributing d pieces of distribution data to d detection modules. Each detection module judges whether received piece of distribution data is authentic to detect whether protection control module is tampered with, and transmits judgment result indicating whether protection control module is tampered with. Management device receives judgment results from d detection modules and manages protection control module with regard to tampering by using received judgment results.

Tampering monitoring system, protection control module, and detection module

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.

Method and device that verifies application program modules

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.

A malicious-module identification device identifies and deactivates a malicious module operating in an information processing device connected thereto via a network. The malicious-module identification device is provided with a reception unit for receiving results of tampering detection from a plurality of modules for detecting tampering, and a determination unit for assuming that a module among the plurality of modules is a normal module, determining, based on the assumption, whether a contradiction occurs in the received results of tampering detection and identifying the module assumed to be a normal module as a malicious module when determining that a contradiction occurs. A deactivation unit outputs an instruction to deactivate the module identified as the malicious module.

Illegal module identifying device, information processing device, illegal module identifying method, illegal module identifying program, integrated circuit, illegal module disabling system, and illegal module disabling method

An update server acquires, from an apparatus, a result of verifications relating to tampering of a protection control module and each of install modules included in an install module group. The update server determines a processing procedure of the apparatus depending on the acquired result of the verifications. Specifically, if it is judged that the protection control module and each of the install modules is unauthentic, then the update server transmits, to the apparatus, an instruction to perform updating of the unauthentic protection control module in preference to a revocation of the unauthentic install module.

Growing community of inventors

Miyagi, Japan

Shingo Hasegawa