Decentralized Interledger Gateway Architectures in Authorization Scenarios with Multiple Ledgers

Combining multiple Distributed Ledger Technologies (DLTs) that include public and private/permissioned ledgers can allow different tradeoffs in terms of performance, cost, privacy, and transparency. However, multiple DLTs must be interconnected in a way that securely binds transactions on different ledgers and allows reliable and trusted transfer of information across the ledgers. We present decentralized interledger gateway architectures for IoT authorization scenarios that include the interconnection of two ledgers: an authorization ledger and a payment ledger. The proposed architectures differ in their complexity, transaction cost, and ability to handle transactions involving multiple ledgers.