Mitsubishi Electric Corporation

Asahi Kasei Kabushiki Kaisha

Mitsubishi Denki Kabushiki Kaisha

Stanley Electric Co., Ltd

Asahi Kasei Chemicals Corporation

Kiyari Co., Ltd.

Mitsubishi Electric R&d Centre Europe B.v.

Nobuhiro Kobayashi

Teruyoshi Yamaguchi

Koichi Shimizu

Tsunato Nakai

Manabu Misawa

Takeshi Yoneda

Takeshi Ueda

Fumiki Murakami

Daisuke Suzuki

Tsuneo Sato

Makoto Itoi

Hisashi Fukuda

Naoki Morishima

Masami Yonemura

Yukio Izumi

Tatsuya Goto

Yutaka Tada

Takeshi Sugawara

Tsutomu Sakagami

Tatsuya Hioki

Jin Kawasaki

Eiichi Sugimoto

Shuichi Iwai

Masamichi Tanji

Benoit Boyer

Yumiko Murakami

Yuji Tamaki

Hiroyasu Tabata

Yumika Kurihara

When a hash expected value, which is an expected value of a hash value of activation software, is stored in a storing unit (), a security calculation unit () compares the hash value of the activation software with the hash expected value. A main calculation unit () activates the activation software when the hash value and the hash expected value match, and stops a process when both do not match. The main calculation unit () performs signature verification for the activation software when the hash expected value is not stored in the storing unit (), and stores in the storing unit () as the hash value expected value, the hash value of the activation software as well as activates the activation software when the signature verification is successful. The main calculation unit () stops a process when the signature verification is not successful.

Software verification device

The present invention provides a methacrylic resin composition comprising

Methacrylic resin composition and molded article

An object of this invention is to obtain a whitelist generator with which the accuracy of data relating to the specifications of normal communication serving as an automatic generation source can be guaranteed, whereby the accuracy of a generated whitelist can be guaranteed over an entire whitelist generation flow. The whitelist generator is applied to a system formed from a plurality of devices, the plurality of devices being configured to exchange data with each other, in order to generate a whitelist used for whitelisting intrusion detection, and includes a model verification unit that verifies, on the basis of an input model, at least one of whether or not normal communication in the system has been modeled correctly and whether or not the model is logically consistent, and a model conversion unit that converts the verified model into a whitelist.

Whitelist generator, whitelist evaluator, whitelist generator/evaluator, whitelist generation method, whitelist evaluation method, and whitelist generation/evaluation method

A key management apparatus receives a key request including a first device identification information and a second device identification information, encrypts a common key using the first device identification information to generate a first encrypted common key, encrypts the common key using the second device identification information to generate a second encrypted common key, and transmits a key response including the first encrypted common key and the second encrypted common key. A first device receives the key response, decrypts the first encrypted common key using the first device identification information to obtain the common key, and transmits the second encrypted common key. A second device receives the second encrypted common key and decrypts the second encrypted common key using the second device identification information to obtain the common key.

Key management system, communication device and key sharing method

A state detection section () detects states of a plurality of controllers () included in a communication system (). An attack determination section () selects, from among a plurality of whitelists () each of which is associated with a combination of states, a whitelist () associated with the combination of the states of the plurality of controllers () detected by the state detection section (). The attack determination section () detects an attack on the communication system () by using the selected whitelist ().

Intrusion detection device, intrusion detection method, and computer readable medium

An allowed communication list conversion unit () assigns one or more flags to request communication and response communication, between which a correspondence relationship is described in a detection rule, and describes, in an allowed communication list, details of a flag operation specifying a value to be set to the flag and a flag condition for determining whether the value to be set is set in the flag, in association with each other. A determination unit () sets the value after determining that communication data on the request communication is normal, determines whether the value is set in the flag based on the flag condition when determining whether communication data on the response communication to the request communication is normal, and determines that the communication data on the response communication is normal when the value is set, to thereby reset the flag.

Data determination device, data determination method, and data determination program

The present invention relates to a security device which performs processes such as authentication or cryptography, for example a security device for securely holding a key used in a cryptographic process, and a security method therefore. The security device includes: an identifier generation unit to generate an identifier specific to the security device by using a PUF; a PUF key generation unit to generate a PUF key specific to the security device by using the identifier; a reception unit to receive a registration command in which the registration key and a signature generated for the registration key by using a secret key corresponding to the public key are contained; a signature verification unit to verify, using the public key, validity of the signature contained in the registration command received by the reception unit and output the verification result indicating either failure or success in the verification; and a command execution unit to reject execution of the registration command in a case where the verification result outputted from the signature verification unit is failure, and to encrypt the registration key of the registration command with the PUF key and then store the encrypted registration key in the registration key storage unit in a case where the verification result is success.

Security device, system, and security method

In the present invention, unauthorized access from outside a facility to a device disposed inside the facility is detected by effectively using the output from a mirror port of a network switch. A gateway device has: a monitored data acquisition unit for saving in a monitored data storage unit, as monitored data, packet data that is outputted from a mirror port of a switch, the packet data being outputted from a device being monitored; an unauthorized access detection unit for detecting unauthorized access by determining whether the monitored data is abnormal on the basis of a comparison between the monitored data and assessment rules; and an unauthorized access notification unit for notifying a server of a monitoring center, which is connected to an external network via an external communication unit, that unauthorized access has been detected.

Relay apparatus, network monitoring system, and program

A block-diagram acquisition unit acquires a block diagram that defines by connection among a plurality of blocks, a data processing procedure to be reflected in a program code. An inconsistency inspection unit inspects whether there is an inconsistency in the data processing procedure defined in the block diagram by tracing the connection among blocks in the block diagram.

Program code generation apparatus

Provided are a methacrylic resin composition and a film containing a methacrylic resin that includes: 50 mass % to 97 mass % of a methacrylic acid ester monomer unit (A); 3 mass % to 30 mass % of a structural unit (B) having a cyclic structure-containing main chain; and 0 mass % to 20 mass % of another vinyl monomer unit (C) that is copolymerizable with a methacrylic acid ester monomer. The methacrylic resin satisfies the following conditions (1) and (2): (1) the methacrylic resin has a weight average molecular weight of 65,000 to 300,000 as measured by GPC; and (2) the total content of specific components is 0.01 mass % to 0.40 mass % as determined by GC/MS.

Methacrylic resin, methacrylic resin composition, film, and production method

An edit data generation unit concatenates the message authentication code of an X&#x2212;1th data block with the message authentication code of an Xth data block, thereby generating Xth edit data. An additional data generation unit generates the message authentication code of the Xth edit data, and extracts a portion of the message authentication code of the Xth edit data as Xth additional data. A packet generation unit generates an Xth packet including the Xth data block and the Xth additional data. A packet transmitting unit transmits the Xth packet.

Packet transmitting apparatus, packet receiving apparatus, and computer readable medium

A data determination apparatus of the present invention includes a state transition model storage unit to store a state transition model representing a state transition, a state management unit to hold an operating state of an own apparatus based on the state transition model, a communication permission list storage unit to store, as a communication permission list, communication permitted data whose communications are permitted in respective operating states, a communication unit to obtain communication determination data, and a determination unit to determine whether or not the communication determination data is communication permitted data whose communication has been permitted in a current operating state, using the current operating state and the communication permission list.

Data determination apparatus, data determination method, and computer readable medium

A certificate management apparatus retains an important certificate, while deleting the oldest referenced certificate. An update determination information output unit outputs update determination information being information for determining whether or not to update a certificate. A certificate cache stores the certificate on a volatile memory. An operation unit stores the update determination information output by the update determination information output unit in the certificate cache by relating to the certificate, and based on the update determination information stored in the certificate cache, updates the certificate related to the update determination information.

Certificate management apparatus and certificate management method

For improving, when performing road-vehicle communication or vehicle-vehicle communication between a roadside device and in-vehicle devices or therebetween, efficiency of distribution information verification including digital signature verification and freshness verification, there are included a memory unit that stores, as an authentication information history, a history of second authentication information of communication data which was received in the past from another communication device and which includes first authentication information, distribution information, and the second authentication information and an authentication processing unit that verifies, on the basis of the first authentication information of new communication data being newly received communication data, authenticity of the second authentication information of the new communication data and that compares the second authentication information of the new communication data with the authentication information history stored in the memory unit to verify freshness of the new communication data.

Data authentication device and data authentication method

A communication apparatus sends a processing request, including request information, a digital signature, and an electronic certificate, to a control apparatus. The control apparatus sends a verification request including the electronic certificate to a verification server. The verification server verifies the electronic certificate included in the verification request, and sends authentication-use reference information, including the verification result, as a verification response, to the control apparatus. When the verification result included in the authentication-use reference information indicates validity, the control apparatus, using the request information and a public key included in the electronic certificate, verifies whether or not the digital signature is valid. When the digital signature is valid, the control apparatus performs the requested processing in accordance with the request information, and sends a processing response, to the communication apparatus.

Growing community of inventors

Tokyo, Japan

Nobuhiro Kobayashi