Secure Keying in Peer Network using Secret Sharing Technique

Identity-based cryptography (IBC) is a type of public key cryptography which a publicly known string representing an individual or organization is used as a public key. The public string could include an email address, domain name, or a physical IP address. IBC has been introduced into Peer-to-Peer (P2P) networks recently for identity verification and authentication purposes. IBC uses user's identity as public key and private keys are issued by key generate center (KGC) after verifying the user's credentials. In current IBC-based solutions issuing of the private keys are not secured. In this paper we propose a secure keying using a secret sharing technique for an IBC based peer to peer network. Where a peer can select the level of security required depending on the importance of the message. This consists of an IBC infrastructure setup phase, a peer registration phase, a secure keying phase and system maintenance phase. These phases make use of a key generation center (KGC) and key privacy authorities (KPAs) to issue private keys to peers securely in order to enable the IBC systems to be more acceptable and applicable in real-world P2P networks. Secret sharing technique used in this project prevents the collusion attacks and denial of service. The theoretical analysis and experimental results show that Secure Keying in Peer Network using this Secret Sharing Technique performs efficiently and also able to support large scale networks.