Node, a root node, and a computer readable medium

A node in a wireless mesh network including a plurality of nodes of which one is a root node and two nodes hierarchically adjacent have a parent-child relationship, the node comprising:

• an authentication processing unit configured to, when the node joins in the wireless mesh network, execute an authentication for network access with the root node;
• a root key setting unit configured to generate a root key as a common key between the root node and the node;
• a parent-child key acquisition unit configured to receive a parent-child key encrypted using the root key from the root node, and to decrypt the parent-child key using the root key;
• and
• a group key transfer unit configured to encrypt a group key using the parent-child key, and to send the group key encrypted to a child node, the node and the child node having the parent-child relationship.

A root node in a wireless mesh network including a plurality of nodes of which two nodes hierarchically adjacent have a parent-child relationship, the root node comprising:

• an authentication processing unit configured to, when a new node joins in the wireless mesh network, execute an authentication for network access with the new node;
• a root key setting unit configured to generate a first root key as a common key between the root node and a first node in the wireless mesh network, and to generate a second root key as a common key between the root node and a second node in the wireless mesh network, the second node and the first node having the parent-child relationship;
• a parent-child key transfer unit configured to receive a parent-child key encrypted using the first root key from the first node, to decrypt the parent-child key using the first root key, to encrypt the parent-child key using the second root key, and to send the parent-child key encrypted to the second node;
• and
• a group key encryption unit configured to encrypt a group key using the parent-child key, and to send the group key encrypted to the second node.

A node in a wireless mesh network including a plurality of nodes of which one is a root node and two nodes hierarchically adjacent have a parent-child relationship, the node comprising:

• an authentication processing unit configured to, when the node joins in the wireless mesh network, execute an authentication for network access with the root node;
• a root key setting unit configured to generate a root key as a common key between the root node and the node;
• a parent-child key setting unit configured to receive a parent-child key encrypted using the root key from the root node, to decrypt the parent-child key using the root key;
• and
• a group key acquisition unit configured to receive a group key encrypted using the parent-child key from a parent node, and to decrypt the group key using the parent-child key, the parent node and the node having the parent-child relationship.

A node in a wireless mesh network including a plurality of nodes of which one is a root node and two nodes hierarchically adjacent have a parent-child relationship, the node comprising:

• an authentication processing unit configured to, when the node joins in the wireless mesh network, execute an authentication for network access with the root node;
• a root key setting unit configured to generate a root key as a common key between the root node and the node;
• a parent-child key acquisition unit configured to receive a parent-child key encrypted using the root key from the root node, and to decrypt the parent-child key using the root key;
• and
• a group key transfer unit configured to encrypt a group key using the parent-child key, and to send the group key encrypted to a child node, the node and the child node having the parent-child relationship.

A root node in a wireless mesh network including a plurality of nodes of which two nodes hierarchically adjacent have a parent-child relationship, the root node comprising:

• an authentication processing unit configured to, when a new node joins in the wireless mesh network, execute an authentication for network access with the new node;
• a root key setting unit configured to generate a first root key as a common key between the root node and a first node in the wireless mesh network, and to generate a second root key as a common key between the root node and a second node in the wireless mesh network, the second node and the first node having the parent-child relationship;
• a parent-child key setting unit configured to generate a parent-child key as a common key between the first node and the second node, to send the parent-child key encrypted using the first root key to the first node, and to send the parent-child key encrypted using the second root key to the second node;
• and
• a group key encryption unit configured to encrypt a group key using the parent-child key, and to send the group key encrypted to the second node.

A node in a wireless mesh network including a plurality of nodes of which one is a root node and two nodes hierarchically adjacent have a parent-child relationship, the node comprising:

• an authentication processing unit configured to, when the node joins in the wireless mesh network, execute an authentication for network access with the root node;
• a root key setting unit configured to generate a root key as a common key between the root node and the node;
• a parent-child key setting unit configured to generate a parent-child key as a common key between the node and a child node, to encrypt the parent-child key using the root key, and to send the parent-child key encrypted to the root node, the node and the child node having the parent-child relationship;
• and
• a group key transfer unit configured to encrypt a group key using the parent-child key, and to send the group key encrypted to the child node.

A root node in a wireless mesh network including a plurality of nodes of which two nodes hierarchically adjacent have a parent-child relationship, the root node comprising:

• an authentication processing unit configured to, when a new node joins in the wireless mesh network, execute an authentication for network access with the new node;
• a root key setting unit configured to generate a first root key as a common key between the root node and a first node in the wireless mesh network, and to generate a second root key as a common key between the root node and a second node in the wireless mesh network, the second node and the first node having the parent-child relationship;
• and
• a parent-child key transfer unit configured to receive a parent-child key encrypted using the second root key from the second node, to decrypt the parent-child key using the second root key, to encrypt the parent-child key using the first root key, and to send the parent-child key encrypted to the first node.

A node in a wireless mesh network including a plurality of nodes of which one is a root node and two nodes hierarchically adjacent have a parent-child relationship, the node comprising:

• an authentication processing unit configured to, when the node joins in the wireless mesh network, execute an authentication for network access with the root node;
• a root key setting unit configured to generate a root key as a common key between the root node and the node;
• a group key acquisition unit configured to, when the node joins in the wireless mesh network, receive a first group key encrypted using the root key from the root node;
• an authentication data setting unit configured to generate authentication data using the first group key;
• and
• a public key/secret key setting unit configured to generate a public key and a secret key, and to send the public key and the authentication data to a parent node, the parent node and the node having the parent-child relationship;
• wherein the group key acquisition unit receives a second group key encrypted using the public key from the parent node, and decrypts the second group key using the secret key.

A node in a wireless mesh network including a plurality of nodes of which one is a root node and two nodes hierarchically adjacent have a parent-child relationship, the node comprising:

• an authentication processing unit configured to, when the node joins in the wireless mesh network, execute an authentication for network access with the root node;
• a root key setting unit configured to generate a root key as a common key between the root node and the node;
• a group key acquisition unit configured to, when the node joins in the wireless mesh network, receive a first group key encrypted using the root key from the root node;
• an authentication data setting unit configured to generate authentication data using the first group key;
• a public key/secret key setting unit configured to generate a public key and a secret key, and to send the public key and the authentication data to a parent node, the parent node and the node having the parent-child relationship;
• and
• a parent-child key acquisition unit configured to receive a parent-child key encrypted using the public key from the parent node, and to decrypt the parent-child key using the secret key;
• wherein the group key acquisition unit receives a second group key encrypted using the parent-child key from the parent node, and decrypts the second group key using the parent-child key.

A computer readable medium for causing a computer to perform a method for controlling a node in a wireless mesh network including a plurality of nodes of which one is a root node and two nodes hierarchically adjacent have a parent-child relationship, the method comprising:

• when the node joins in the wireless mesh network, executing an authentication for network access with the root node;
• generating a root key as a common key between the root node and the node;
• generating a parent-child key as a common key between a parent node and the node, the parent node and the node having the parent-child relationship;
• encrypting the parent-child key using the root key;
• sending the parent-child key encrypted to the root node;
• receiving a group key encrypted using the parent-child key from the parent node;
• and
• decrypting the group key using the parent-child key.

A computer readable medium for causing a computer to perform a method for controlling a node in a wireless mesh network including a plurality of nodes of which one is a root node and two nodes hierarchically adjacent have a parent-child relationship, the method comprising:

• when the node joins in the wireless mesh network, executing an authentication for network access with the root node;
• generating a root key as a common key between the root node and the node;
• receiving a parent-child key encrypted using the root key from the root node;
• decrypting the parent-child key using the root key;
• receiving a group key encrypted using the parent-child key from a parent node, the parent node and the node having the parent-child relationship;
• and
• decrypting the group key using the parent-child key.

A computer readable medium for causing a computer to perform a method for controlling a root node in a wireless mesh network including a plurality of nodes of which two nodes hierarchically adjacent have a parent-child relationship, the method comprising:

• when a new node joins in the wireless mesh network, executing an authentication for network access with the new node;
• generating a first root key as a common key between the root node and a first node in the wireless mesh network;
• generating a second root key as a common key between the root node and a second node in the wireless mesh network, the second node and the first node having the parent-child relationship;
• generating a parent-child key as a common key between the first node and the second node;
• sending the parent-child key encrypted using the first root key to the first node;
• sending the parent-child key encrypted using the second root key to the second node;
• encrypting a group key using the parent-child key;
• and
• sending the group key encrypted to the second node.

A computer readable medium for causing a computer to perform a method for controlling a node in a wireless mesh network including a plurality of nodes of which one is a root node and two nodes hierarchically adjacent have a parent-child relationship, the method comprising:

• when the node joins in the wireless mesh network, executing an authentication for network access with the root node;
• generating a root key as a common key between the root node and the node;
• when the node joins in the wireless mesh network, receiving a first group key encrypted using the root key from the root node;
• generating authentication data using the first group key;
• generating a public key and a secret key;
• sending the public key and the authentication data to a parent node, the parent node and the node having the parent-child relationship;
• receiving a parent-child key encrypted using the public key from the parent node;
• and
• decrypting the parent-child key using the secret key;
• wherein the receiving a first group key includes
• receiving a second group key encrypted using the parent-child key from the parent node, and
• decrypting the second group key using the parent-child key.