Management device, management system, and non-transitory computer readable medium

1. A management device comprising:

a receiving unit that receives, from a link origin, a link request to link a user ID of a user between the management device and the link origin, wherein the link origin is a management server to which the user has subscribed; and

a control unit that, in response to the link request, requests the user to input a first unique information of the link origin, acquires externally a second unique information from the link origin, compares the first unique information input from the user to the second unique information acquired from the link origin, execute the link to link the user ID between the management device and the management server in response to the first unique information matching the second unique information, and does not execute the link in a case in which the first unique information not matching the second unique information,

in response to the link request, the control unit further receives from the link origin an email address of the user, transmit to the user a confirmation email which requests from the user the first unique information of the link origin by using the email address, and receive the first unique information in response to transmitting the confirmation email, and

in response to receiving the first unique information, the control unit further transmit an inquiry for the second unique information from the link origin, and the second unique information is received from the link origin in response to transmitting the inquiry.

2. The management device according to claim 1 , wherein the control unit acquires the second unique information of the user by transmitting an inquiry to the link origin.

3. The management device according to claim 1 , wherein the second unique information of the link origin is unique information shared among users of the link origin.

4. The management device according to claim 1 , wherein the second unique information of the link origin is unique information that is unique to each user of the link origin.

5. The management device according to claim 1 , wherein the first unique information or the second unique information is an ID used to subscribe to the link origin and is stored within the link origin.

6. A management system comprising:

a link origin server; and a link destination server, wherein

the link origin server is a management server to which the user has subscribed and is configured to transmit a link request to link a user ID of a user between the link origin server and the destination server, and

the link destination server includes

a transmitting unit that, when the link request is received from the link origin server, transmits a link confirmation email to the user to link and also requests an input of a first unique information,

an acquiring unit that acquires a second unique information of the user to link from the link origin server, and

a control unit that in response to the link request, acquires the second unique information of the user to link from the link origin server, compares the first unique information input from the user with the second unique information acquired from the link origin server to execute the link to link the user ID between the link origin server and the link destination server in response to the first unique information matching the second unique information, and does not execute the link in a case in which the first unique information not matching the second unique information,

in response to the link request, the control unit further receives from the link origin an email address of the user, transmit to the user a confirmation email which requests from the user the first unique information of the link origin by using the email address, and receive the first unique information in response to transmitting the confirmation email, and

in response to receiving the first unique information, the control unit further transmit an inquiry for the second unique information from the link origin, and the second unique information is received from the link origin in response to transmitting the inquiry.

7. The management system according to claim 6 , wherein in response to the link request, the link destination server receives from the link origin server an email address of the user, transmit to the user a confirmation email which requests from the user the first unique information of the link origin server by using the email address, and receive the first unique information in response to transmitting the confirmation email.

8. A non-transitory computer readable medium storing a program causing a computer to execute a process by a management device for managing information, the process comprising:

receiving, from a link origin, a link request to link a user ID of a user between the management device and the link origin, wherein the link origin is a management server to which the user has subscribed;

in response to the link request, requesting the user to input a first unique information of the link origin, acquires externally a second unique information from the link origin, compares the first unique information input from the user to the second unique information acquired from the link origin, execute the link to link the user ID between the management device and the management server in response to the first unique information matching the second unique information, and does not execute the link in a case in which the first unique information not matching the second unique information;

in response to the link request, receiving from the link origin an email address of the user, transmit to the user a confirmation email which requests from the user the first unique information of the link origin by using the email address, and receive the first unique information in response to transmitting the confirmation email, and

in response to receiving the first unique information, transmitting an inquiry for the second unique information from the link origin, and the second unique information is received from the link origin in response to transmitting the inquiry.

9. The non-transitory computer readable medium according to claim 8 , wherein

in response to the link request, the control unit receives from the link origin an email address of the user, transmit to the user a confirmation email which requests from the user the first unique information of the link origin by using the email address, and receive the first unique information in response to transmitting the confirmation email.