Answers for the Quest "Secure Randomness in Smart Contracts" in Certik (https://skynet.certik.com/quest/secure-randomness-in-smart-contracts?referralId=4455176899181661117) 1. Why is randomness difficult to generate securely on-chain? - Because smart contracts are deterministic and public 2. What is the primary risk of using predictable randomness in smart contracts? - Front-running and manipulation 3. What does Chainlink VRF provide for secure randomness? - Random values with cryptographic proofs 4. What is a tradeoff of commit-reveal schemes? - Requires multiple steps and user coordination
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Answers for the Quest "Tornado Cash – Post-Sanctions Usage and Risks" in Certik (https://skynet.certik.com/quest/tornado-cash-post-sanctions-usage-and-risks?referralId=10038257061673192682) 1. What does Tornado Cash do? - Breaks transaction links for privacy 2. What technology enables Tornado Cash to provide privacy? - Zero-Knowledge Proofs 3. What happened after sanctions were lifted in March 2025? - Legitimate usage increased, illicit usage decreased 4. What should users be cautious of even after the sanctions were lifted? - Interacting with sanctioned entities or wallets
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Answers for the Quest "Wrench Attacks in Crypto" in Certik (https://skynet.certik.com/quest/wrench-attacks-in-crypto?referralId=14491973336496447133) 1. Why are wrench attacks becoming more common? - On-chain wealth is transparent and crypto is irreversible 2. Which of the following is NOT a good way to reduce wrench attack risks? - Posting wallet balances online 3. How does a multisig wallet help defend against wrench attacks? - It prevents any single person from accessing funds alone 4. What is the primary benefit of using time locks in smart contracts? - Buys time before large withdrawals execute
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