Confidential AI inference with end-to-end encryption, decentralized quorum verification, and on-chain economic settlement on Arbitrum.
## The Problem
Every prompt sent to ChatGPT, Claude, or Gemini is stored, analyzed, and potentially used for model training. Samsung banned ChatGPT after employees leaked confidential code. OpenAI's Redis bug exposed 1.2% of users' payment info. For enterprises, financial institutions, and healthcare, this is a non-starter.
## Blindference
Blindference is a decentralized AI inference network where your prompt is encrypted in the browser before it ever leaves your device. A 3-node quorum runs the same inference and cross-validates results. Payment is held in escrow until consensus is reached, then released automatically. No provider ever sees your plaintext.
**How It Works**
1. AES-256-GCM encryption in the browser — ciphertext uploaded to IPFS
2. Fhenix CoFHE threshold decryption — key split, only assigned nodes can unlock
3. Quorum execution — 1 Leader + 2 Verifiers run identical models (Groq Llama 3.3 70B / Gemini 2.5 Flash)
4. On-chain consensus — SHA-256 hashes compared, ≥2/3 match = ACCEPTED
5. Economic settlement — Reineira escrow auto-releases on consensus, auto-refunds on rejection
**Why Arbitrum**
We built on Arbitrum Sepolia for fast, low-cost settlement with Ethereum-grade security. 14 smart contracts deployed including PromptKeyStore, ResultRegistry, BlindferenceInference, and Reineira PayoutClaimer. The entire stack — frontend, ICL coordinator, payment service, and node runtime — is live and testable today.
**Market Fit**
- Enterprise AI: Legal, financial, healthcare — any industry where prompt confidentiality is mandatory
- DeFi: Private risk scoring, credit assessment without exposing user data
- Autonomous Agents: AI agents executing sensitive operations without leaking strategy
**Traction**
- Won $3,000 in Fhenix Buildathon (competitor track)
- Partnership with ReineiraOS for escrow infrastructure
- Live on Arbitrum Sepolia
**Links**- App: https://www.blindference.xyz
- GitHub (Org): https://github.com/Blindference