Abstract: Provided is an information processing apparatus including a board on which electronic components are provided, a content encryption section configured to encrypt a content with a device key, a first storage section which is provided as one of the electronic components on the board and is capable of storing first identification information specific to the board, the first identification information being used to generate the device key, a transfer section configured to transfer the first identification information through a network to a server apparatus capable of storing the first identification information, and a first acquisition section configured to acquire the first identification information through the network from the server apparatus.

Abstract: Provided is an information processing apparatus including a content encryption section generates a content encrypted with a device key, a first storage section storing board determination information for determining whether the board is a board at the time of shipment or a replacement board, a second storage section capable of storing board specific information used to generate the device key, a third storage section storing apparatus specific information, a recording section associating the board and apparatus specific information each other and recording them through the connection section in the external storage apparatus, and an updating section reading from the external storage apparatus the board specific information associated with the apparatus specific information, and updating content of the second storage section and the board determination information of the first storage section, when the board is determined to be the replacement board on the basis of the board determination information.

Abstract: Disclosed herein are a communication control method and a network system. When a total band of a priority flow and a best-effort flow in any one of switches SW1 and SW2 and hosts H1 to H3 connected to a network exceeds a predetermined value, priority control is executed to make the priority flow take precedence of the best-effort flow and flow control is executed to limit the band of the best-effort flow. Thus, priority data such as sounds and moving pictures can be transmitted in a high-quality and reliable transmission without turbulence. As a result, it is possible to provide a communication control method and a network system offering high-quality communications even if transmitted data includes sounds and/or moving pictures.

Abstract: Disclosed herein are a communication control method and a network system. When a total band of a priority flow and a best-effort flow in any one of switches SW1 and SW2 and hosts H1 to H3 connected to a network exceeds a predetermined value, priority control is executed to make the priority flow take precedence of the best-effort flow and flow control is executed to limit the band of the best-effort flow. Thus, priority data such as sounds and moving pictures can be transmitted in a high-quality and reliable transmission without turbulence. As a result, it is possible to provide a communication control method and a network system offering high-quality communications even if transmitted data includes sounds and/or moving pictures.