Abstract: The conference system includes a plurality of terminal apparatuses and a conference management apparatus. The terminal apparatus has an access privilege granting unit, a permission information storage device, and an access privilege setting unit. The conference management apparatus has an access control information updating unit and an access restriction management unit. The access privilege granting unit generates permission information, and send the permission information to a target terminal apparatus. Upon receiving the permission information, the access privilege setting unit causes the permission information to be stored in the permission information storage device, and also sends the permission information to the conference management apparatus. Then, the access control information updating unit updates access control information according to the permission information.

Abstract: The conference system includes a plurality of terminal apparatuses and a conference management apparatus. The terminal apparatus has an access privilege granting unit, a permission information storage device, and an access privilege setting unit. The conference management apparatus has an access control information updating unit and an access restriction management unit. The access privilege granting unit generates permission information, and send the permission information to a target terminal apparatus. Upon receiving the permission information, the access privilege setting unit causes the permission information to be stored in the permission information storage device, and also sends the permission information to the conference management apparatus. Then, the access control information updating unit updates access control information according to the permission information.

Abstract: Data is sent to one or more processing devices which have corresponding addresses. At least a portion of the data is encoded, and a control address is attached to the portion of the data. The control address is associated with the corresponding address of a respective one of the processing devices when the portion of the data is intended solely for the respective processing device. At least a segment of the control address is associated with a group of the processing devices when the portion of the data is intended for each processing device in the group. The portion of the data is transmitted and received, and a control address is read from the received portion of the data. The received portion of the data is decoded to form decoded data when the portion is intended for a group of the processing devices that includes the respective processing device or when the data is intended solely for the respective processing device.