Explore cutting-edge cryptanalysis techniques in this conference talk from PQCrypto 2023, focusing on near-optimal multi-positional mismatch attacks against Kyber and Saber. Delve into the research presented by Erik Mårtensson, which challenges the single-position approach and introduces innovative strategies for attacking post-quantum cryptographic schemes. Gain insights into the vulnerabilities of prominent lattice-based cryptosystems and understand the implications for their security. This 26-minute session, part of the Cryptanalysis track, offers a deep dive into advanced cryptographic analysis methods that are shaping the future of post-quantum cryptography.