CECPQ2 post-quantum key-agreement enabled for TLS (obsolete)
Supported on: Microsoft Edge version 93-113, Windows 7 or later
Registry
Software\Policies\Microsoft\Edge Software\Policies\Microsoft\Edge Value name: CECPQ2Enabled
Enabled: CECPQ2Enabled = 1
Disabled: CECPQ2Enabled = 0
Description
OBSOLETE: This policy is obsolete and doesn't work after Microsoft Edge 113. This policy was removed in Microsoft Edge version 114 and is ignored if set. It served to disable CECPQ2, but CECPQ2 is disabled by default. A separate policy is introduced to control the rollout of the replacement of CECPQ2. That replacement is a combination of the standard key-agreement X25519 with NIST's chosen post-quantum KEM, called "Kyber". If you enable or don't configure this policy, then Microsoft Edge follows the default rollout process for CECPQ2, a post-quantum key-agreement algorithm in Transport Layer Security (TLS). CECPQ2 results in larger TLS messages that, in rare cases, can trigger bugs in some networking hardware. This policy can be set to False to disable CECPQ2 while networking issues are resolved. This policy is a temporary measure and is removed in future versions of Microsoft Edge.