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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.

Live · Taking pilot clients

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How CooL works
Architecture
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Quickstart
Verify it yourself
Receipt spec
SDK on npm

Trust

Security model
Readiness ladder
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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Meet your people.

The team behind Northwind Cipher, and everyone in the community.

The team

Pranauv Shrinaath (Keni)System design

Kailosh KalimuthuSystem architecture and development

Members

Thahira Banu@thahira · 70 points

Nirmal R@nirmal-r · 70 points

Rupak Raj@rupak-raj · 70 points

SAKTHI PRANAV VIGNESH@spvverses · 70 points

Yuki@yuki-yuki · 80 points

Syed Akasha Hashmi@syed-akasha-hashmi · 80 points

GUHAN KALAIVANAN@guhan-kalaivanan · 70 points

Christeena PS@christeena-ps · 80 points

Pranauv Shrinaath@pranauv-shrinaath · 80 points

vijay@vijay · Contributor · 220 points

kailosh kalimuthu@kailosh-kalimuthu · 80 points