Cloudflare shields IPsec from quantum downgrade attacks2 reports from 2 outlets in 1 language · first reported 2026-09-29 13:00 UTC · updated 2026-09-29 18:57 UTC · JSONScience & technologyCloudflareReportsCloudflare shields IPsec from quantum downgrade attacksquantumzeitgeist.com · en · 2026-09-29 18:57 UTCPreventing quantum downgrade attacks against IPsecblog.cloudflare.com · en · 2026-09-29 13:00 UTC