Research And Implementation Of A Generic Privacy-preservation Framework For Decentralized Applications

Decentralized applications(DApps)are hailed as the ambitious future of the internet.However,an attenuating factor to this daring vision is privacy preservation owing to inherent transparency in the underlying technology-Blockchain.In this paper,a more secured lightweight ring signature(LwRS)that is double-spending resistant is constructed and combined with an improved Dual-key stealth address protocol for IoT(DkSAP-IoT)integrated with security notions of data availability and security.The secured LwRS is realized through construction of a new,fortified commitment scheme that makes use of the signer's entire private key followed by the computation of a stronger key image using a cryptographic hash function whereas the improvements to DkSAP-IoT are realized using encryption and Interplanetary File System(IPFS).These improved schemes are thereafter used to develop a generic privacy preservation framework for blockchain platforms.Inbuilt into the framework is a novel,zero-knowledge-based,secured smart contract and subsequently a DApp for public key aggregation,thus paving way for privacy-centric DApps.Experimental results show that users incur gas cost of only 214,731 equivalent to $0.16 to use the framework which is over 60% less than existing smart contract-based frameworks.