Patent ID: 11882208
Assignee: NIPPON TELEGRAPH AND TELEPHONE CORPORATION
Field: Digital communication (Electrical engineering)
Classification: CPC H  G | IPC H

Claim 5:
6. An information processing method used in a chatbot system including a plurality of user terminals, a chatbot, and a chat server, the method comprising:
receiving, by the chatbot, as an input, a list including a user ID of a user terminal which has utilization authority for data,
transmitting a data acquisition request as a proxy of the user, wherein the data acquisition request specifies the data for acquisition and further includes the user ID,
causing an external service to determine whether the user ID is associated with viewing permission for the data,
when the user ID is associated with the viewing permission for the data, causing the external service to transmit the data to the chatbot,
in response to acquiring the data from the external service, creating, by the chatbot, a message from the data which is acquired from an external service,
generating, by the chatbot, a policy-equipped ciphertext by using an encryption algorithm of ciphertext policy attribute-based encryption,
transmitting, by the chatbot, the policy-equipped ciphertext to the chat server,
receiving, by each of the user terminals, a policy-equipped ciphertext from the chat server and
decrypting, by each of the user terminals, the policy-equipped ciphertext using an attribute-equipped secret key which is generated on the basis of a user ID of the user terminal.