Introduction to Permissionless Blockchains
A permissionless blockchain is an open network that anyone can participate in without prior approval. It emphasizes open participation and decentralization, but typically requires trade-offs among transaction speed, scalability, and openness.
What Is a Permissionless Blockchain
A permissionless blockchain is also known as an open-access blockchain. Participants do not need to obtain approval, permission, or authorization. Anyone who can connect to the internet can generally join the network, send and receive transactions, view or contribute code, run nodes, and participate in the consensus process according to the network's rules.
Key Features and Common Examples
These networks typically feature transaction transparency, a degree of anonymity, no central authority, and open-source code. Bitcoin, Ethereum, and BNB Smart Chain are all cited as examples. Open participation helps create a more distributed network structure and reduces the possibility of malicious participants engaging in centralized collusion.
Differences from Permissioned Blockchains
Permissioned blockchains are typically controlled by a single entity and restrict who can validate transactions or access information in the distributed ledger, which is why they are also often called private blockchains. Enterprises may choose this model if they want to use blockchain technology while protecting certain information due to regulatory or competitive considerations.
Trade-offs of Open Networks
Permissionless blockchains are open to the public and generally more decentralized, but they may also face scalability issues, such as slower transaction processing and a limited number of transactions that can be verified per unit of time. Therefore, openness and decentralization do not mean that all performance metrics will be better.
Original Tutorial
https://www.binance.com/zh-CN/academy/glossary/permissionless-blockchain
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