Quantum Computers Are Not a Threat to 128-bit Symmetric Keys
Summary
The article asserts that 128-bit symmetric keys remain secure against quantum attacks like Grover's algorithm, and that no immediate key-length changes are required. It backs this with calculations, comparisons, and citations to NIST, BSI, CNSA, and researchers, urging focus on post-quantum updates for asymmetric cryptography instead of symmetric keys.