Starknet relies on validity proofs, which deem transactions valid only when cryptographically proven, unlike fraud proofs that assume invalidity by default

Quotes that support claims

Fraud proofs operate on the principle that transactions are considered invalid until verified otherwise, whereas validity proofs ensure transactions are deemed valid only when backed by cryptographic evidence. Speaking on the development, Eli Ben-Sasson, co-founder and CEO of StarkWare, said:

Fraud proofs assume transactions are invalid until proven valid, while validity proofs assume transactions are valid only if proven valid with cryptographic evidence.