Why Google Is Replacing RSA With ECDSA (And Why It Isn't About Quantum)

This story was originally published on HackerNoon at: https://hackernoon.com/why-google-is-replacing-rsa-with-ecdsa-and-why-it-isnt-about-quantum.
Google Trust Services shifts some Google services to ECDSA leaf certificates by default in Q2 2026. Classical cleanup, not PQC: how TLS migrates in layers.
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Google Trust Services announced that a number of Google services will move from RSA to ECDSA leaf certificates by default in Q2 2026. ECDSA is not quantum-safe; under standard resource estimates it falls to a smaller quantum computer than RSA-2048. The move still makes sense: TLS migrates in layers, post-quantum key exchange is already the default in major browsers, and certificate migration is blocked on signature sizes and ecosystem constraints that Google plans to address with Merkle Tree Certificates against a stated 2029 timeline.