Abstract The efficiency and the security of smart contracts are their two fundamental properties, but might come at odds: use optimizers to enhance may introduce bugs compromise security. Our focus is on (Ethereum Virtual Machine) block-optimizations , which jump-free blocks opcodes by eliminating, reordering even changing original opcodes. We reconcile providing verification technology formall...

Quantum algorithms often apply classical operations, such as arithmetic or predicate checks, over a quantum superposition of data; these so-called oracles are the largest components program. To ease construction efficient, correct oracle functions, this paper presents VQO, high-assurance framework implemented with Coq proof assistant. The core VQO is OQASM, assembly language. OQASM operations m...