A method and system of authenticating a node in a distributed network is provided. The distributed network comprises a plurality of nodes connected to a shared medium of the distributed network. Each of the plurality of nodes is provisioned with an identity certificate comprising a public key, a private key associated with the public key and an identification sequence. The identification sequence is unique to the system comprising the distributed network. A second node of the plurality of nodes generates a node authenticity related information for authenticating at a first node of the plurality of nodes. The node authenticity related information comprises a signature generated using the private key of the second node from a sequence, which comprises the identification sequence. The second node transmits the node authenticity related information together with the identity certificate provisioned at the second node to the first node.