Why does my randomness beacon assume no one has built a faster machine?
機会
Randomness beacons used for validator selection, NFT minting, and DeFi parameter sampling rely on verifiable delay functions whose security guarantee rests on an assumption about how long sequential computation takes. If a well-funded adversary builds custom ASIC hardware that evaluates the VDF faster than the honest deadline, they can compute the beacon output in advance and bias any protocol that consumes it. A paper accepted to ACM CCS 2026 formalised this as an economic attack with a rational optimal-stopping structure and showed that several deployed parameterisations fall below the threshold needed to deter a hardware-equipped attacker during high-reward events like MEV spikes. No deployed beacon today publishes a hardware threat model or adjusts its delay parameter against observed ASIC progress.
重要な理由
Randomness is a foundational input to committee elections and on-chain lotteries, and a manipulable beacon silently degrades the security of every downstream protocol that depends on it without any visible on-chain signal.
機会をどう評価するか
Opportunity Scoreは測定値ではなく、私自身の見解です。どれほど痛みを伴うか、どれほど頻繁に影響を与えるか、そして今日時点で解決策がいかに少ないか。スコアが高いほど、構築する価値が高いと私は考えています。
それが現れたときにどれほどの痛みをもたらすか。
実際にどれほど頻繁に人々がそれに直面するか。
今日時点で、それに対する優れたツールがいかに少ないか。