Renesas Electronics Corporation

Nec Electronics Corporation

Daisuke Oshida

Shigemasa Shiota

Toshiyuki Takewaki

Shigeru Furuta

Akira Yamazaki

Takuji Onuma

Masayuki Hirokawa

Manabu Iguchi

Toshiji Taiji

Takashi Fujimori

Koichi Ohto

Yasuaki Tsuchiya

Masayuki Hiroi

Mieko Hasegawa

Hironori Toyoshima

Hiroaki Nanba

Ichiro Honma

Takaharu Kunugi

Kan Takeuchi

Masaki Shimada

Shinya Konishi

Fumio Tsuchiya

Naoya Ota

Takeshi Sunada

Makoto Yabuuchi

Suguru Fujita

Norio Okada

Naoya Inoue

Yoshiyuki Sato

Takuya Maruyama

Hiroyuki Kunishima

Makoto Ueki

Ippei Kume

Yasuhiro Sagesaka

Shinji Yokogawa

Akihiro Yamate

Yoshio Takazawa

Masakatsu Yokota

Hirokazu Katsuyama

Tetsuya Fukunaga

Takeshi Itome

A semiconductor device according to an embodiment includes a holding circuit including a buffer configured to obtain a heat stress information having a temperature dependency every predetermined period and a stress counter configured to accumulate the heat stress information and hold the accumulated value as a cumulative stress count value, a control circuit including an operation determination threshold value, and a wireless communication circuit. According to the semiconductor device according to the embodiment, while reducing the power consumption, it is possible to wirelessly transmit the cumulative heat stress information.

Semiconductor device, electronic device and electronic system

The semiconductor device has a module having a predetermined function, an error information acquisition circuit for acquiring error information about an error occurring in the module, a stress acquisition circuit for acquiring a stress accumulated value as an accumulated value of stress applied to the semiconductor device, and an analysis data storage for storing analysis data as data for analyzing the state of the semiconductor device, the error information and the stress accumulated value at the time of occurrence of the error being associated with each other.

Semiconductor device and analysis system

In a semiconductor device and an information processing system according to one embodiment, an external device generates external device unique information by using a unique code which is a value unique to the semiconductor device, and generates second information by encrypting the first information with the use of the external device unique information. The semiconductor device stores the second information and generates the principal device unique information independently of the external device, with the use of the unique code of the semiconductor device holding the second information, and decrypts the second information with the use of the principal device unique information to obtain the first information.

Semiconductor device and information processing system for encrypted communication

To discriminate between a circuit where a failure does not occur and a circuit where a failure might occur, a wireless communication device has tested units which belong to a transmission side circuit, tested units which belong to a reception side circuit, a test signal generation unit for generating a test signal, a test signal reception unit for receiving a test signal, a test signal determination unit for determining whether or not the test signal received by the test signal reception unit is normal, and test signal transfer units for transferring a test signal from the transmission side circuit to the reception side circuit.

Wireless communication device and determination method

Provided is a cryptographic communication system including a first semiconductor device and a second semiconductor device. The first semiconductor device includes a common key generation unit that generates a common key CK(a) by using a unique code UC(a) and correction data CD(a), and an encryption unit that encrypts the common key CK(a) generated in the common key generation unit by using a public key PK(b) of the second semiconductor device. The second semiconductor device includes a secret key generation unit that generates a secret key SK(b) by using a unique code UC(b) and correction data CD(b), and a decryption unit that decrypts the common key CK(a) encrypted in the encryption unit by using the secret key SK(b).

Cryptographic communication system and cryptographic communication method

In an on-vehicle system, the gateway is duplexed, and a countermeasure table is included. The countermeasure table defines a failure phenomenon occurring in communication, an identification method for identifying a factor on whether the failure phenomenon is caused by a failure of the gateway or caused by a security attack on the gateway, and a corresponding countermeasure method. When it is detected that a failure phenomenon has occurred is communication through the gateway, the on-vehicle system determines a factor of the detected failure phenomenon based on the identification method defined in the countermeasure table, and makes countermeasures in accordance with the corresponding countermeasure method.

On-vehicle system, program, and controller

An object of the present invention is to prevent an attack from or via a communication device on an information apparatus in a communication system including the information apparatus, the communication device coupled to the information apparatus in the aftermarket, a server that authenticates the communication device, and a communication unit between the communication device and the server. A communication device includes a first interface that performs first communications with a server, a second interface that performs second communications with an information apparatus, and an information processing unit that performs an information process including a communication protocol process accompanied by the first and second communications. The information processing unit of the communication device sends a signature of the communication device from the first interface to the server, receives via the first interface a driver sent after the server authenticates the communication device on the basis of the received signature, and sends the received driver from the second interface to the information apparatus.

Communication device, LSI, program, and communication system

Provided is a high-speed and light-weighted authentication system that makes IP address filtering possible and does not impair real-time property even on a network including many and unspecific entities (communication devices). In a communication system that a plurality of communication devices are coupled together such that mutual communication is possible over the network, the communication devices communicate with a server under a secure environment, when authentication has been obtained from the server, random seeds of the same value and individual identifiers are issued to them, each communication device generates the IP address that includes a pseudorandom number and the identifier, and the communication devices establish communication between the communication devices that include the pseudorandom numbers that are mutually the same in their IP addresses.

Communication system, communication device, vehicle and communication method

The disclosed invention can provide a semiconductor device, a lifetime prediction system, and a lifetime prediction method enabling it to notify a user that a semiconductor device is likely to become faulty, before the semiconductor device becomes faulty. A semiconductor device includes functional units and a lifetime prediction circuit. The lifetime prediction circuit acquires a deterioration degree indicating a degree of how each functional unit deteriorates, using a signal that is output from each functional unit. The lifetime prediction circuit executes processing to make a notification that the semiconductor device is close to its lifetime, if the deterioration degree is more than a first threshold.

Semiconductor device, monitoring system, and lifetime prediction method

To raise confidentiality of the value stored in the ROM, in an IC having a built-in or an externally-attached ROM storing a value (program and/or data) encrypted using a predetermined cryptographic key. The IC includes the ROM storing the encrypted value (program and/or data), a unique code generating unit, and a decrypting unit. The unique code generating unit generates a unique code specifically determined by production variation. The decrypting unit calculates a cryptographic key on the basis of the generated unique code and a correction parameter, and decrypts the encrypted value read out from the ROM by using the calculated cryptographic key. The correction parameter is preliminarily calculated outside the IC, on the basis of an initial unique code generated from the unique code generating unit immediately after production of the IC, and the predetermined cryptographic key used for encryption of the value to be stored in the ROM.

Semiconductor integrated circuit and system

Devices between which packets are transmitted and received include mutually corresponding packet counters. The same random number value is given to the packet counters as their initial values and the packet counters are updated with packet transmission/reception. The transmission-side device generates a MAC value, draws out part thereof on the basis of a counted value of its own packet counter, sets it as a divided MAC value, generates a packet by adding the value to a message and transmits the packet onto a network. The reception-side device generates a MAC value on the basis of the message in the received packet, draws out part thereof on the basis of a counted value of its own packet counter, compares the part with the divided MAC value in the received packet and thereby performs message authentication.

Communication system and communication device

The communication terminal includes a communication interface for acquiring external time information from outside and a non-volatile memory and operates as described below. The communication terminal periodically acquires external time information, encrypts the internal time information calibrated based on the acquired external time information, and thereafter writes the encrypted internal time information into the non-volatile memory. In an initialization sequence after power-on of the communication terminal, the communication terminal reads and decrypts internal time information that is lastly written to the non-volatile memory before the power-on, newly acquires external time information, and verifies validity of the acquired external time information by comparing the acquired external time information with the read internal time information.

Communication terminal and program

It is intended to provide a safe non-contact charging environment that enables finding an electronic appliance that remains left in a vehicle before start of charging and preventing trouble that an electronic appliance breaks down by electromagnetic waves generated during charging by means of electromagnetic coupling. A process of checking to see that an electronic appliance remains left inside a vehicle, based on wireless communication information emitted by the electronic appliance left inside the vehicle is performed in advance. When it has been detected that an electronic appliance remains left, a charging current value is controlled according to an allowable current of the detected electronic appliance or an alert is generated to notify that the electronic appliance remains left.

Non-contact power supply method and non-contact power supply system

To raise confidentiality of the value stored in the ROM, in an IC having a built-in or an externally-attached ROM storing a value (program and/or data) encrypted using a predetermined cryptographic key. The IC includes the ROM storing the encrypted value (program and/or data), a unique code generating unit, and a decrypting unit. The unique code generating unit generates a unique code specifically determined by production variation. The decrypting unit calculates a cryptographic key on the basis of the generated unique code and a correction parameter, and decrypts the encrypted value readout from the ROM by using the calculated cryptographic key. The correction parameter is preliminarily calculated outside the IC, on the basis of an initial unique code generated from the unique code generating unit immediately after production of the IC, and the predetermined cryptographic key used for encryption of the value to be stored in the ROM.

Growing community of inventors

Kanagawa, Japan

Daisuke Oshida