Flash Freezing Flash Boys (F3B) introduces a novel per-transaction encryption method to mitigate malicious Miner Extractable Value (MEV) attacks on Ethereum. Developed by H. Zhang et al., F3B addresses the limitations of previous threshold encryption systems by ensuring each transaction remains confidential until finality. This approach uses a lightweight symmetric key for encryption, reducing data size and computational load. F3B can be implemented using either TDH2 or PVSS cryptographic protocols, each offering different advantages in terms of flexibility and efficiency. The protocol incentivizes honest behavior among trustees through a staking mechanism and penalizes premature decryption. Despite its potential, F3B's complexity and integration challenges make its deployment on Ethereum unlikely, though it holds promise for other blockchain networks and applications requiring delayed execution.