Management server, management system, method of controlling a management server and program

A management system configured to comprise:

• at least two terminals;
• and
• a management server configured to connect to the terminals via a network, wherein the management server comprises:
• a memory section including at least two memory areas and configured to store instructions;
• and at least one processor configured to execute the instructions, to perform processing comprising:
• storing, in the at least two memory areas, at least two temporary ID links to which a real ID of a user and temporary IDs of the user are associated;
• receiving a message converting, in a case where the message includes a first temporary ID corresponding to a real ID stored in a first memory area, the first temporary ID to a second temporary ID which corresponds to the real ID, on a basis of a temporary ID link stored in a second memory area, for generating a transmission message.

A method of controlling a management server which comprises

• a memory section including at least two memory areas, the method of controlling the management server comprising:
• storing a temporary ID link, to which a real ID of a user and a temporary ID of the user are associated, in the at least two memory areas;
• receiving a message;
• converting, in a case where the message includes a first temporary ID which corresponds to a real ID and is stored in a first memory area, the first temporary ID to a second temporary ID which corresponds to the real ID, on a basis of the temporary ID link stored in a second memory area, for generating a transmission message;
• and
• transmitting the transmission message to a specified destination.