Quantum readiness: Hash-based signatures

Building robust digital signature algorithms is one of the main challenges in post-quantum cryptography, as classical signatures such as ECDSA and RSA are broken by quantum computers. Thankfully, in the past decades, the academic field has come up with multiple quantum-resistant algorithms which are now being standardized and implemented in modern software. This article highlights XMSS and SPHINCS+, two digital signature algorithms which rely on the well-known robustness of hash functions against quantum computers. However, each one c...