NCSC Guidance Recommends TLS 1.3 and PQC‑Ready Configurations for Secure Data in Transit
What Happened – The UK National Cyber Security Centre (NCSC) published detailed guidance on configuring Transport Layer Security (TLS). It covers TLS 1.3, migration from TLS 1.2, disabling legacy SSL/TLS versions, certificate handling, and a roadmap toward post‑quantum cryptography (PQC).
Why It Matters for Trust & Control Assurance
- Demonstrates the need for a continuous control‑assurance program that validates cryptographic settings and evidence of timely updates.
- Aligns with the “encryption and key management” control objective that maps to dozens of framework requirements (e.g., NIST CSF 2.0 Protect‑Data Security, ISO 27001 A.10).
- Highlights the importance of automated configuration checks and audit‑ready reporting – the core of Verisq’s Control Mapping capability.
Who Is Affected – Government agencies, cloud‑hosting providers, SaaS vendors, and any organization that runs web or mail services handling sensitive data.
Recommended Actions
- Inventory all TLS‑enabled services and verify they run TLS 1.3 or TLS 1.2 with NCSC‑approved cipher suites.
- Disable TLS 1.0/1.1 and all SSL versions immediately.
- Establish a migration plan to TLS 1.3 and begin testing PQC‑ready profiles in a staging environment.
- Integrate continuous TLS‑configuration monitoring into your control‑assurance platform to generate defensible audit evidence.
Technical Notes – The guidance references RFC 8996 (deprecation of TLS 1.0/1.1) and RFC 9851 (TLS 1.2 hardening). It also points to upcoming NIST drafts on PQC integration with TLS 1.3. No specific CVE is cited; the focus is on configuration hygiene rather than a discovered flaw.
Source: NCSC – Using TLS to protect data