Ntt Docomo, Inc.

Toru Egashira

Atsushi Takeshita

Yu Inamura

Hiroshi Inamura

Ken Ohta

A device management apparatus includes a device configuration information holding unit, a subscriber information holding unit, a security policy holding unit, a module state holding unit, and a device diagnosis unit. The security policy holding unit holds a security policy set based on the configuration based on the configuration information or the subscriber information. The device diagnosis unit examines the security policy and the module state information to make a diagnosis of a configuration of the device.

Device management apparatus, device, and device management method

A task management system in an operating system executes a plurality of tasks in parallel. The task management system includes an execution standby state changer configured to generate a verifier of a task from data stored in a task address space and to store the generated verifier in a verifier storage area, when the task is changed from an executed state to an execution standby state; and an executed state changer configured to generate a verifier of the task from the data stored in the task address space and to verify matching of the generated verifier with the verifier of the task stored in the verifier storage area, when the task is changed from the execution standby state to the executed state.

Task management system

A multitask execution system executes a plurality of tasks in parallel. The multitask execution system includes an encryption processor configured to generate a key stream unique to each task, by using key data, a task ID for identifying each task, and an output value, the number of the key data being smaller than the number of the plurality of tasks, the output value being output from a monotonic incremental counter when each task is generated, a value of the monotonic incremental counter configured to continue to be increased without being decreased, and to encrypt data stored in a protected area in a memory space for each task by using the generated key stream.

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Yokohama, Japan

Toru Egashira