As reported by TechFlow, the Fusaka upgrade introduces EIP-7951, which allows smartphones with TEE (Trusted Execution Environment) to sign Ethereum transactions using the secp256r1 curve. This change addresses a long-standing compatibility issue between Ethereum's secp256k1 and the security chips in modern devices. By implementing a precompiled contract, Ethereum significantly reduces the gas cost of r1 signature verification from hundreds of thousands to just 6900 gas, making it viable for real-world use. This development is a key step toward enabling 'account abstraction,' allowing users to authorize transactions via biometric authentication without needing a traditional hardware wallet.
EIP-7951 Enables Phones to Act as Ethereum Hardware Wallets via TEE Integration
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