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Northwind Cipher

CooL seals every change to your AI — prompt, model, permission — as a signed, tamper-evident record. Verify any record yourself, offline, with a verifier we do not control.

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Receipt spec
SDK on npm

Trust

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Threat model
Limits of the evidence

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© 2026 Northwind Cipher Pvt. Ltd.. BUSL-1.1 SDK. Member of NVIDIA Inception.

Attestation verified on Phala Cloud Intel TDX. Read what that does and does not prove.

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