SpyChain: A Lightweight Blockchain for Authentication and Anonymous Authorization in IoD

Abstract

In this paper, we have proposed a lightweight blockchain based model to provide distributed authentication and anonymous authorization in IoD. We have proposed four different approaches to hide the identity of unmanned aerial vehicles UAV during the message exchanges using the blockchain. Non Interactive Zero Knowledge Proof (NIZKP) with bilinear map has been used to provide anonymity of UAV on the blockchain. The first approach describes a mechanism for the unlinkability of user identities. The second approach provides resistance against malleability attack together with unlinkability. The third approach ensures sender trackability to the receiver. In the fourth scheme, a UAV can delegate its task of tracking transactions to GCS in such a way that GCS can track the transaction of UAV but cannot claim the transaction’s authority. Relevant proofs of security for Signature Unforgeability and Unlinkability in Ciphertext (UN-C) are given to prove the strength of the techniques.