Security of Client Consensus



The Blockchain Is Ordered, Timestamped Messages

The Blockchain Is Unordered, Valid, Non-conflicting Messages

Repercussions of Client Consensus

Silent Fork

Consensus Ambiguity

Differentiation of SPV and Validity

Stronger SPV

Trust-based Light Client Security Model

Upgrading Software

Attacks Against Partial SPV Clients that use Client Consensus

CPU/network Exhaustion Attack

Parallel Construction Attack

Parallel Construction Spray Attack





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