Consensus Mechanisms·Lesson 11 of 28·13 min
Security, Decentralization, and Speed
This lesson is for enrolled learners
The concept Every blockchain design runs into the same wall, often called the blockchain trilemma: security, decentralization, and scalability (speed/throughput) are in tension, and pushing hard on any two tends to weaken the third. There is no known design that maximizes all three simultaneously — every real chain you'll encounter has made a deliberate trade-off, whether its creators advertise that……
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