Overview of GoFetch Attack GoFetch is a microarchitectural side-channel attack that can extract secret keys from constant-time cryptographic implementations via data memory-dependent prefetchers (DMPs). We show that DMPs are present in many Apple CPUs and pose a real threat to multiple cryptographic implementations, allowing us to extract keys from OpenSSL Diffie-Hellman, Go RSA, as well as CRYSTALS Kyber and Dilithium. Demo Videos. Go's RSA-2048 Key Extraction on Apple m1 People Behind GoFetch ...