Abstract: A server for controlling an information sharing state between a first mobile phone and a second mobile phone via a network, including: a network interface that communicates with the first mobile phone and the second mobile phone; a memory that stores a predetermined distance data; and circuitry that receives first and second GPS signals, first and second user information, and first and second restriction information from the first and second mobile phones respectively; calculates a distance between the first and second mobile phones; compares the distance with the predetermined distance; changes an information sharing state between the first and second mobile phones from a first state to a second state based on the comparison result; and restricts the change of the information sharing state based on the first restriction information and the second user information.

Abstract: A server for controlling an information sharing state between a first mobile phone and a second mobile phone via a network, including: a network interface that communicates with the first mobile phone and the second mobile phone; a memory that stores a predetermined distance data; and circuitry that receives first and second GPS signals, first and second user information, and first and second restriction information from the first and second mobile phones respectively; calculates a distance between the first and second mobile phones; compares the distance with the predetermined distance; changes an information sharing state between the first and second mobile phones from a first state to a second state based on the comparison result; and restricts the change of the information sharing state based on the first restriction information and the second user information.

Abstract: A server for controlling an information sharing state between a first mobile phone and a second mobile phone via a network, including: a network interface that communicates with the first mobile phone and the second mobile phone a memory that stores a predetermined distance data; and circuitry that receives first and second GPS signals, first and second user information, and first and second restriction information from the first and second mobile phones respectively calculates a distance between the first and second mobile phones; compares the distance with the predetermined distance; changes an information sharing state between the first and second mobile phones from a first state to a second state based on the comparison result; and restricts the chance of the information sharing state based on the first restriction information and the second user information.

Abstract: A server for controlling an information sharing state between a first mobile phone and a second mobile phone via a network, including: a network interface that communicates with the first mobile phone and the second mobile phone a memory that stores a predetermined distance data; and circuitry that receives first and second GPS signals, first and second user information, and first and second restriction information from the first and second mobile phones respectively calculates a distance between the first and second mobile phones; compares the distance with the predetermined distance; changes an information sharing state between the first and second mobile phones from a first state to a second state based on the comparison result; and restricts the chance of the information sharing state based on the first restriction information and the second user information.

Abstract: A server for controlling an information sharing state between a first mobile phone and a second mobile phone via a network, including: a network interface that communicates with the first mobile phone and the second mobile phone; a memory that stores a predetermined distance data; and circuitry that receives first and second GPS signals, first and second user information, and first and second restriction information from the first and second mobile phones respectively; calculates a distance between the first and second mobile phones; compares the distance with the predetermined distance; changes an information sharing state between the first and second mobile phones from a first state to a second state based on the comparison result; and restricts the change of the information sharing state based on the first restriction information and the second user information.

Abstract: A server for controlling an information sharing state between a first mobile phone and a second mobile phone via a network, including: a network interface that communicates with the first mobile phone and the second mobile phone; a memory that stores a predetermined distance data; and circuitry that receives first and second GPS signals, first and second user information, and first and second restriction information from the first and second mobile phones respectively; calculates a distance between the first and second mobile phones; compares the distance with the predetermined distance; changes an information sharing state between the first and second mobile phones from a first state to a second state based on the comparison result; and restricts the change of the information sharing state based on the first restriction information and the second user information.

Abstract: There is provided an information processing apparatus including a condition determining unit that changes, when information of a first user and information of a second user satisfy a predetermined condition, a state from a first state in which information sharing on a communication network is disabled between a first terminal apparatus used by the first user and a second terminal apparatus used by the second user to a second state in which the information sharing is enabled, and a restricting unit that restricts the change of the state from the first state to the second state, on the basis of restriction information that is acquired from the first terminal apparatus and is used to restrict the change of the state from the first state to the second state.