Communication device, communication method, computer program product, and communication system
AssigneeKabushiki Kaisha Toshiba
InventorYoshimichi Tanizawa
Life of this patent
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Abstract
According to a communication device includes a sharing processing unit, a storage, and a controller. The sharing processing unit shares an encryption key with one or more external devices. The storage stores therein the encryption key. The controller compares a current amount representing an amount of the stored encryption key with a specified reference amount and performs control to continue or stop sharing processing, which is performed by the sharing processing unit, for sharing the encryption key on the basis of a comparison result.
Claims12
A communication device comprising:
- a sharing processing unit to share an encryption key with one or more external devices;
- a storage to store therein the encryption key;
- and
- a controller to compare a current amount representing an amount of the stored encryption key with a specified reference amount and perform control to continue or stop sharing processing, which is performed by the sharing processing unit, for sharing the encryption key on the basis of a comparison result,
- wherein the controller further changes the reference amount according to a decrement frequency of the current amount.
A non-transitory computer-readable medium having stored thereon computer-readable instructions which when executed by a computer cause the computer to perform a method comprising:
- sharing an encryption key with one or more external devices;
- storing therein the encryption key;
- comparing, via circuitry, a current amount representing an amount of the stored encryption key with a specified reference amount;
- and
- performing control to continue or stop sharing processing for sharing the encryption key on the basis of a comparison result,
- wherein the circuitry further changes the reference amount according to a decrement frequency of the current amount.
A communication system comprising:
- a plurality of communication devices, wherein
- each of the communication devices includes:
- a sharing processing unit to share an encryption key with one or more of the other communication devices;
- a storage to store therein the encryption key;
- and
- a controller to compare a current amount representing an amount of the stored encryption key with a specified reference amount and perform control to continue or stop sharing processing, which is performed by the sharing processing unit, for sharing the encryption key on the basis of a comparison result,
- wherein the controller further changes the reference amount according to a decrement frequency of the current amount.
Dependencies are inferred from the claim text.