Device, method, and medium for facility management verification

A facility management system, comprising:

• a monitoring terminal;
• and
• a facility management device being a representative facility management device among a plurality of facility management devices that manages equipment, the facility management device comprising:
• a user verifier, embodied as a computer with a central processing unit (CPU) and a memory, that performs a user verification according to a request from the monitoring terminal;
• a verification code generator, embodied as the computer, that generates verification codes for each of the plurality of facility management devices by encoding verification data using unique public keys of each of the plurality of facility management devices, when the user verification is successful, and to transmit those verification codes to the monitoring terminal;
• and
• a public key list storage that stores a list of public keys of each of the plurality of facility management devices, wherein
• the verification code generator:
• adds a digital signature that uses a self-owned secret key to the verification data as data that indicates the user verification was successful, and
• generates verification codes for each of the facility management devices as data that was encoded using data to which a digital signature was added as the public keys of each of the facility management devices stored in the public key list storage.

A method of managing equipment by a facility management device, the facility management device being a representative facility management device among a plurality of facility management devices and including a user verifier, embodied as a computer with a central processing unit (CPU) and a memory, a verification code generator embodied as the computer, and a public key list storage that stores a list of public keys of each of the plurality of facility management devices, the method comprising:

• a user verification step including performing, by the user verifier, according to a request from a monitoring terminal, a user verification;
• a public key verification code generating step that includes, when the user verification is successful, generating, by the verification code generator, verification codes for each of the plurality of facility management devices by encoding verification data using unique public keys of each of the plurality of facility management devices, and transmitting, by the verification code generator, the verification codes to the monitoring terminal;
• an add digital signature step that includes adding, by the verification code generator, a digital signature that uses a self-owned secret key to the verification data as data that indicates the user verification was successful;
• and
• a digital signature verification code generation step that includes generating, by the verification code generator, verification codes for each of the plurality of facility management devices as data that was encoded using data to which a digital signature was added as the public keys of each of the facility management devices stored in the public key list storage.

A computer-readable non-transitory storage medium, with instructions stored thereon, that when executed by a user verifier and a verification code generator, embodied as a computer, among a plurality of computers, with a central processing unit (CPU) and a public key list storage that stores a list of public keys of each of the plurality of computers, causes the user verifier and the verification code generator to perform a method that manages equipment, the method comprising:

• a user verification step including performing, by the user verifier, according to a request from a monitoring terminal, a user verification;
• a public key verification code generating step that includes, when the user verification is successful, generating, by the verification code generator, verification codes for each of the plurality of facility management devices by encoding verification data using unique public keys of each of the plurality of facility management devices, and transmitting, by the verification code generator, the verification codes to the monitoring terminal;
• an add digital signature step that includes adding, by the verification code generator, a digital signature that uses a self-owned secret key to the verification data as data that indicates the user verification was successful;
• and
• a digital signature verification code generation step that includes generating, by the verification code generator, verification codes for each of the plurality of facility management devices as data that was encoded using data to which a digital signature was added as the public keys of each of the facility management devices stored in the public key list storage.