Interledger Smart Contracts for Decentralized Authorization to\n Constrained Things

Abstract

We present models that utilize smart contracts and interledger mechanisms to\nprovide decentralized authorization for constrained IoT devices. The models\ninvolve different tradeoffs in terms of cost, delay, complexity, and privacy,\nwhile exploiting key advantages of smart contracts and multiple blockchains\nthat communicate with interledger mechanisms. These include immutably recording\nhashes of authorization information and policies in smart contracts, resilience\nthrough the execution of smart contract code on all blockchain nodes, and\ncryptographically linking transactions and IoT events recorded on different\nblockchains using hash and time-lock mechanisms. The proposed models are\nevaluated on the public Ethereum testnets Rinkeby and Ropsten, in terms of\nexecution cost (gas), delay, and reduction of data that needs to be sent to the\nconstrained IoT devices.\n