The Ethereum Foundation has announced a strategic shift from prioritizing proof speed to enhancing security, aiming to achieve 128-bit provable security by the end of 2026. This move is deemed an "uncompromising" threshold, with zkEVM projects required to use official tools to assess true security levels. The foundation highlighted that while near-instant block proofs have been achieved, some mathematical security assumptions are being challenged, posing systemic risks and potential threats of forged proofs altering L1 states. The foundation outlined a three-phase roadmap: a unified security assessment by early 2026, reaching at least a 100-bit security threshold by mid-2026, and achieving 128-bit security with smaller proof sizes by year-end.