transactions

OmniLedger: A Secure, Scale-Out, Decentralized Ledger via Sharding

Dr Philipp Jovanovic, École Polytechnique Fédérale de Lausanne (EPFL)

Apr 29, 12:00 - 13:00

B9 L2 H1

scale out security transactions

Designing a secure permissionless distributed ledger that performs on par with centralized payment processors such as Visa is challenging. Most existing distributed ledgers are unable to "scale-out" -- growing total processing capacity with number of participants -- and those that do compromise security or decentralization. This work presents OmniLedger, the first scale-out distributed ledger that can preserve long-term security under permissionless operation. OmniLedger ensures strong correctness and security by using a bias-resistant public randomness protocol to choose large statistically representative shards to process transactions, and by introducing an efficient cross-shard commit protocol to handle transactions affecting multiple shards atomically.