Patent ID: 8582777
Filing Date: 2013-11-12
Classification: H04L

Abstract:
1. A lightweight key distribution method for a backbone node of a wireless network, the method comprising: receiving a connection request message from a new node intending to join the wireless network; sending an identification (ID) to allocate to the new node and a certificate to verify the ID to the new node as a response to the receiving of the connection request message; receiving a key request message from the new node, the key request message including the allocated ID and the certificate; generating a session key as a result of the receiving of the key request message; calculating a second intermediate value by applying a first concatenated value to a hash function, the first concatenated value being acquired by concatenating the session key and a first intermediate value that corresponds to respective partial keys included in a key pool; generating an encryption key using the calculated second intermediate value, the generating of the encryption key comprising: encrypting a partial key corresponding to the common key index with the generated encryption key, the common key index including commonalities existing between the key index of the backbone node and a key index of the new node; and sending a key part that includes the encrypted partial key and the second intermediate value to the new node.