Censorship Resistance: Why Blockchains Are Difficult to Control Unilaterally
Censorship resistance means that valid transactions are difficult for a single participant to block, alter, or roll back. It generally stems from a decentralized participation structure, predetermined protocol rules, and broad consensus, but it is not absolutely secure.
What Is Censorship Resistance
Censorship resistance is a characteristic of blockchain networks: as long as they follow the protocol rules, participants generally do not need permission from an intermediary to initiate transactions. Once confirmed, transactions are propagated to numerous nodes and recorded on a distributed ledger, making them difficult for any single party to block, modify, or revoke.
Why Is It Important
Censorship resistance is closely related to decentralization. The network is not operated by a single company or institution; transaction rules are defined in advance by the protocol and maintained through broad consensus among participants. The more widely decision-making authority is distributed, the more difficult it is for any entity to unilaterally restrict users, declare transactions invalid, or retroactively modify the rules.
Censorship Resistance Also Has Limits
Censorship resistance is not absolute. In proof-of-work (PoW) networks, security depends on the majority of computing power operating honestly; if one party controls most of the network’s computing power, it may attempt to reorder or censor transactions, resulting in a 51%attack. The more decentralized the network and the higher the total computing power, the more difficult it is generally to carry out such an attack.
Original Tutorial
https://www.binance.com/zh-CN/academy/glossary/censorship-resistance
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