BlockchainIntermediate#Architecture#Core Concept
Blockchain Trilemma
B
Definition
A design lens for discussing tensions among decentralization, security, and scalability. It is not a measurable theorem, universal score, or proof that every network must sacrifice exactly one of three fixed properties.
Source reviewed
- Ethereum.org: Scaling opens in a new tab
Supports: Explains Ethereum's scaling goal as increasing speed and throughput without sacrificing decentralization or security, and distinguishes several scaling approaches.
- Ethereum.org: Danksharding opens in a new tab
Supports: Documents Ethereum's protocol-specific data-availability and scaling design, including blobs, data-verification responsibilities, and stated roadmap constraints.
Concept Diagram
Key Takeaways
1
The trilemma is a lens for questions about system trade-offs, not a universal score or a three-box theorem
2
Decentralization, security, and scalability each require defined metrics, threat model, and operating conditions
3
Layering and modularity move responsibilities and trust assumptions; they do not make evidence unnecessary
4
Compare a named protocol and deployment with dated documentation instead of relying on TPS or architecture labels
Practical Example
A comparison calls one chain 'more decentralized' because it advertises a larger validator count. A reviewer asks which validators are active, how stake and clients are distributed, whether operators share infrastructure, what users must trust for withdrawals, and which workload produced the throughput figure. They report the measured conditions and unresolved assumptions rather than awarding a universal trilemma score.
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Related Terms
Blockchain
Zero-Knowledge Proofs (ZKP)A cryptographic proof that a defined statement or computation satisfies a protocol without disclosing the witness beyond what that protocol reveals. It is not, by itself, a privacy or performance guarantee for an application.
Blockchain
Layer 2 RollupA rollup that is designed to operate as an Ethereum layer 2: it executes outside Mainnet while relying on published Ethereum data and protocol-specific settlement and security mechanisms. See also: Rollups.
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