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Comparing Mechanisms
Each of the previously discussed verification mechanisms (native, external, optimistic) has its benefits and costs. As the famous economist, Thomas Sowell, once said:
“There are no solutions. There are only trade-offs.”
Therefore, there is no best solution for all use cases, rather trade-offs that must be made by the application developer deciding to use the messaging system. In this section, we will present a simplified exploration of the trade-off space.

Comparison of Mechanisms

Verification Mechanism
Trust Assumption
Security
Extensibility / Reusability
Cost
Light Client Relay
Untrusted with synchrony assumptions
Very High
Low
High
Optimistic
Honest 1-of-n
High
High
Medium
Validator / PoS
Honest k-of-n with social slashing
Medium
High
Medium
Multi-signature Addresses
Honest k-of-n
Low
Very High
Low
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