The iPhone 17 introduces Memory Integrity Enforcement (MIE), a default hardware-level memory protection using Enhanced Memory Tagging Extension to block dangerous memory access, reducing risks of zero-day attacks on crypto wallets. Hacken notes it significantly lowers the threat of memory-corruption exploits, benefiting high-net-worth crypto users. MIE, always-on across processes, raises the cost for attackers targeting wallet apps and Passkey flows, though it doesn’t protect against phishing or replace secure hardware wallets, urging continued user vigilance.