Method of exchanging game items, networked game system, and social media

A method of exchanging digital items in social media configured to provide a space for exchanging information of users using association information and user information provided to each personal ID stored in the database, the social media being implemented on a computer system configured to communicate with a plurality of user terminals via a communication network, the user information including an item possession list containing item identification information to which the digital item possessed by each user is correlated, the digital item being item identification information of the digital item possessed by each user of the social media correlated to the item possession list, the digital item enabled to be used by the user in a scene of information exchange in the social media based on a description thereof, the item identification information including value information in a scene of information exchange in the social media, the method comprising:

• a first process of identifying a personal ID (1) as one of parties of the exchange and an item identification information (2) correlated to the item possession list of the personal ID (1) as information related to exchanging items, and enabling sending a message of proposal for exchanging the digital item of the item identification information (2) with something using the item identification information (2) and a personal ID (3) other than the personal ID (1) to the user terminal identified by the personal ID (3), the exchange proposal message (4) including value information of the item identification information (2);
• a second process of enabling sending an exchange accepting message (6) showing intention for exchanging with the item identification information (5) to the user terminal of the personal ID (1) when the item identification information (5) of an exchanging object is determined in the item identification information correlated to the item possession list of the personal ID (3) for responding to the exchange proposal message (4), the exchange accepting message (6) including value information of the item identification information (5);
• and
• a third process of registering the item ID corresponding to the item identification information (5) and deleting the item ID corresponding to the item identification information (2) in the item possession list of the personal ID (1), and registering the item ID corresponding to the item identification information (2) and deleting the item ID corresponding to the item identification information (5) in the item possession list of the personal ID (3) when the social media determines a response to the exchange acceptance message (6) from the user terminal of the personal ID (1) is acceptance.