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// PHASE 04 · POST-QUANTUM

PHASE 04 — HYBRID ROLLOUT

Classical + PQC in parallel for each protocol. Measure compat, perf, and interop with partners on their schedule.

DURATION6–12 months
MODEParallel · measured
PARTNERSCoordinated rollout
Why hybrid

YOU CANNOT CUT OVER

Your partners aren't on your schedule. Your firmware can't be redeployed overnight. You can't trust a brand-new algorithm with no incidents and no deprecation signal. Hybrid is how you migrate without breaking — and how you keep a fallback.

What rolls out

PROTOCOL BY PROTOCOL

  • 01

    TLS

    Hybrid key exchange (X25519 + ML-KEM) for external and internal endpoints. Measured against latency and error budgets.

  • 02

    Code signing

    Dual signatures — classical for backwards compat, PQC for longevity. Verifier upgrades ahead of signers.

  • 03

    VPN / IPsec

    Hybrid IKEv2 where supported; gradual vendor migration elsewhere.

  • 04

    PKI

    Hybrid certificate issuance and chain validation. CAs updated first, then subscribers.

  • 05

    Messaging / storage

    Encryption at rest and in transit upgraded protocol-by-protocol with data-class priority.

// BY THE NUMBERS

6–12

MONTHS

Parallel

CLASSICAL + PQC

Measured

PERF · INTEROP · ERRORS

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