Communication device using improved secret key updating method
AssigneeKabushiki Kaisha Toshiba
InventorsHiroyuki Aizu, Takaharu Yamamoto, Takeshi Saito, Keiichi Teramoto
Life of this patent
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Abstract
A communication device that stores a secret key to be used in an authentication and an encryption of communication information with respect to a specific communication device, and carries out communications with the specific communication device, by using the stored secret key to be used with respect to the specific communication device, is equipped with a unit for updating a specific secret key, when an update request received from another communication device is requesting a secret key updating, according to an update content given along with the update request which indicates the specific secret key.
Claims16
A communication device, comprising:
- a secret key storing unit configured to store a secret key to be used in an authentication and an encryption of communication information with respect to a specific communication device;
- a communication unit configured to carry out communications with the specific communication device, by using the secret key to be used with respect to the specific communication device stored in the secret key storing unit;
- and
- a secret key updating unit configured to update a specific secret key in the secret key storing unit, when an update request received from another communication device is requesting a secret key updating, according to an update content given along with the update request which indicates the specific secret key.
A communication method at a communication device, comprising:
- storing a secret key to be used in an authentication and an encryption of communication information with respect to a specific communication device, in a memory of the communication device;
- carrying out communications with the specific communication device, by using the secret key to be used with respect to the specific communication device stored in the memory;
- and
- updating a specific secret key in the memory, when an update request received from another communication device is requesting a secret key updating, according to an update content given along with the update request which indicates the specific secret key.
A computer program product for causing a computer to function as a communication device, the computer program product comprising:
- a first computer program code for causing the computer to store a secret key to be used in an authentication and an encryption of communication information with respect to a specific communication device, in a memory of the communication device;
- a second computer program code for causing the computer to carry out communications with the specific communication device, by using the secret key to be used with respect to the specific communication device stored in the memory;
- and
- a third computer program code for causing the computer to update a specific secret key in the memory, when an update request received from another communication device is requesting a secret key updating, according to an update content given along with the update request which indicates the specific secret key.
Dependencies are inferred from the claim text.