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Cloudflare puts regional key protection into a post-quantum beta

Cloudflare has opened a closed beta of GeoKey Manager designed to restrict private-key use to a customer’s chosen region while adding post-quantum protection. The system separates globally distributed encrypted keys from regional secrets that unlock them. Cloudflare plans general availability in the first quarter of next year; traffic routing and plaintext processing have their own controls.

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Regional private keys enter a closed beta

Cloudflare, the cloud and network-services company, opened its post-quantum GeoKey Manager in closed beta on October 23. The service is part of its Data Localization Suite, which provides controls over where customer data is handled. Cloudflare says the new key manager is designed to let only servers in a customer-selected geography unwrap private keys. The company plans general availability in the first quarter of next year.[1], [2]

The announcement addresses data that can remain sensitive for years, including government, financial and health information. An attacker could retain encrypted material now and try to decrypt it with future quantum computers. Cloudflare combines its geographic key restrictions with a migration to cryptography intended to withstand that threat.[1]

Encrypted keys travel separately from regional secrets

The design combines ML-KEM-768, a post-quantum key-encapsulation method, with the classical X25519 method. A symmetric regional root key is associated with a region and an epoch, or key generation. Application-specific key pairs are derived from that root. Encrypted customer keys can circulate globally with metadata identifying the service, region and epoch; the root secrets follow a separate provisioning path that supplies only authorized regional servers.[1]

Missing regional keys stop requests

Cloudflare says the edge service refuses to start when a required regional key is missing or malformed. During operation, a request is rejected if its regional key is unavailable locally. The same root can support several service keys within an epoch, so a compromised root has a wider scope than a compromised application-specific key. Traffic forwarding, tunnel termination and inspection locations are managed by Regional Services and other components. GeoKey Manager controls key unwrapping within that wider localization arrangement.[1]

References

  1. News sourceCloudflareCloudflare opens a post-quantum regional key manager in closed beta↩1↩2↩3↩4
  2. News sourceQuantum Computing ReportCloudflare opens post-quantum GeoKey Manager in closed beta↩
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