With recent high-profile blockchain exploits making headlines, questions about underlying security models deserve attention. Garand Tyson, Senior Software Engineer at the Stellar Development Foundation, took a deep dive into this topic, examining what happens when the economic incentives meant to protect blockchain networks break down.
The analysis examines two notable challenges in Proof-of-Stake (PoS) systems:
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Economic Incentive Problems: When attack profits exceed stake penalties (as demonstrated in the 2023 MEV-Boost exploit where attackers sacrificed $10,000 but extracted $25 million)
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Non-Economic Motivations: The assumption that all validators act according to profit incentives may not hold against determined adversaries with strategic objectives
The piece also examines how the Stellar network Proof-of-Agreement approach handles these challenges differently:
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Using trust networks instead of economic stakes for validator participation
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Implementing different transaction ordering mechanisms that reduce MEV opportunities
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Creating accountability through known validators rather than anonymous stake-holders
While each consensus mechanism involves different trade-offs, understanding these technical distinctions helps inform decisions about which technologies might be appropriate for various use cases.
We thought Garand's perspective might interest you as you evaluate blockchain technologies for your own projects.
