Blockchain Principles

Fundamental principles of blockchain technology.

• Cryptography
• Consensus Mechanism
• Settlement Layer
• Scaling Trilemma

Questions

Which of the four fundamental principles — cryptography, consensus, settlement, or the scaling trilemma — is the most common source of production failure in live blockchain systems?

• The scaling trilemma forces a trade-off between security, decentralization, and speed — which vertex do most Layer 2 solutions sacrifice, and is that trade-off explicit in their documentation?
• Consensus mechanisms determine how nodes agree on state — how does the choice of consensus (PoW vs PoS vs BFT) change the security assumptions for smart contract developers building on top?
• Settlement finality varies by chain — what are the practical implications for an application that needs to act on a confirmed transaction within seconds rather than waiting for full finality?