Information providing system and method for providing information

A method of providing information comprising:

• (a) transmitting by a user terminal to a server, via a network, a connection state including a session identifier indicating whether the user terminal exists on a session between the user terminal and the server;
• (b) providing capability to perform operation (a) from the server to the user terminal along with a session identification and information to fulfill a request of the user terminal;
• and
• (c) managing session information in the server to provide information to the user terminal according to the connection state of the user terminal.

A method of managing user authentication in a server, comprising:

• receiving a user ID and a password from a user and authenticating the user;
• storing a session ID that corresponds to the user ID in a management table;
• transmitting the session ID and a monitoring applet to the authenticated user's client;
• receiving screen event information indicating whether the user's client exists on a session specified by the session ID, from the monitoring applet in the user's client;
• and
• releasing the session ID when determined that the user's client is no longer accessing the server according to the screen event information received from the monitoring applet in the user's client.

A machine-readable medium that provides instructions for managing user authentication in a server, which, when executed by a machine, cause the machine to perform operations comprising:

• receiving a user ID and a password from a user and authenticating the user;
• storing a session ID that corresponds to the user ID in a management table;
• transmitting the session ID and a monitoring applet to the authenticated user's client;
• receiving screen event information indicating whether the user's client exists on a session specified by the session ID, from the monitoring applet in the user's client;
• and
• releasing the session ID when determined that the user's client is no longer accessing the server according to the screen event information received from the monitoring applet in the user's client.