Let’s Encrypt’s post-quantum certificate size breakthrough

Post-quantum signatures are large enough to hurt global page loads, so practical compression and deployment engineering are becoming central to upgrading web PKI

Quantum-proof security has a massive size problem. #Postquantum signatures are so large that implementing them breaks global website load times. Yesterday, Let's Encrypt @letsencrypt announced the engineering breakthrough that fixes it:

Ranked #28 on backlist 2026-06-04 (04 Jun 2026 UTC) · by @pqalabs (PQA Labs) · view on X ↗

How it ranks: Backlist reads my Twitter/X timeline, scores every tweet for substance with an LLM rubric (not engagement), and publishes the daily top picks with a one-line takeaway. Curated by Surya Dantuluri.