Introduction
Decentralisation is often presented as inherently superior. In reality, it introduces fundamental trade-offs.
The core challenge:
Scalability vs Security vs Decentralisation
1. The Blockchain Trilemma
No system can fully optimise:
- decentralisation
- scalability
- security
Improving one often degrades another.
2. Performance Constraints
Distributed consensus requires:
- network communication
- validation redundancy
This leads to:
- lower throughput
- higher latency
Compared to centralised systems.
3. Security Considerations
Decentralisation improves:
- censorship resistance
- fault tolerance
But introduces:
- attack vectors (51% attacks)
- smart contract vulnerabilities
4. Practical Design Choices
Real-world systems often:
- sacrifice full decentralisation
- use Layer 2 scaling
- introduce governance structures
Conclusion
Decentralisation is not a binary property. It is a design variable that must be optimised based on system requirements.
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