Communication method, communication system, anonymizing device, and server

A communication system comprising an anonymizing device connected to a communication node through a first network, and a server connected to the anonymizing device through a second network, wherein

• the anonymizing device comprises:
• a packet processing unit that, upon receiving a packet transmitted from the communication node, encapsulates the received packet, and sends the encapsulated packet to the second network, using an address of the anonymizing device as a source address of the encapsulated packet and an address of the server as a destination address thereof, and
• the server comprises:
• an anonymous address generation unit that generates an anonymous address based on a prefix;
• and
• a packet processing unit that, upon receiving the encapsulated packet transmitted from the anonymizing device, decapsulates the encapsulated packet, rewrites a source address of the decapsulated packet into the anonymous address, and sends the decapsulated packet to the second network, using an address of the anonymizing device as the source address of the decapsulated packet.

A communication method comprising:

• by an anonymizing device,
• upon receiving a packet transmitted from a communication node connected through a first network,
• generating an anonymous address based on a prefix acquired from a server connected to the anonymizing device through a second network;
• rewriting a source address of the received packet into the anonymous address, encapsulating the received packet, and sending the encapsulated packet to the second network, using an address of the anonymizing device as a source address of the encapsulated packet and an address of the server as a destination address thereof;
• and
• by the server,
• upon receiving the encapsulated packet transmitted from the anonymizing device, decapsulating the encapsulated packet, and transferring the decapsulated packet to the second network.

A communication method comprising:

• by an anonymizing device, upon receiving a packet transmitted from a communication node connected through a first network, encapsulating the received packet, and sending the encapsulated packet to a second network connecting the anonymizing device and a server, using an address of the anonymizing device as a source address of the encapsulated packet and an address of the server as a destination address thereof;
• by the server connected to the anonymizing device through a second network,
• upon receiving the encapsulated packet transmitted from the anonymizing device,
• generating an anonymous address based on a prefix;
• and
• decapsulating the encapsulated packet, rewriting a source address of the decapsulated packet into the anonymous address, and sending the decapsulated packet to the second network, using an address of the anonymizing device as the source address of the decapsulated packet.

A communication system comprising an anonymizing device connected to a communication node through a first network, and a server connected to the anonymizing device through a second network, wherein

• the anonymizing device comprises:
• a packet processing unit that, upon receiving a packet transmitted from the communication node, rewrites a source address of the received packet into an anonymous address acquired from the server, encapsulates the received packet, and sends the encapsulated packet to the second network, using an address of the anonymizing device as a source address of the encapsulated packet and an address of the server as a destination address thereof, and
• the server comprises:
• a transfer unit that, upon receiving the encapsulated packet transmitted from the anonymizing device, decapsulates the encapsulated packet and sends the decapsulated packet to the second network.