A trust mechanism is a system, protocol, or institution that allows parties who lack prior knowledge of one another to transact or cooperate with reasonable assurance of honest behaviour. Such mechanisms range from intermediaries and reputation systems to cryptographic and consensus protocols that replace interpersonal trust with verifiable, incentive-aligned guarantees.
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- Traditional trust mechanisms rely on trusted third parties such as banks, escrow, and courts, while blockchains substitute decentralised consensus and cryptography to achieve trust-minimisation. The design of incentives, penalties, and verifiability determines how robustly a mechanism deters defection and sustains cooperation at scale.