🔐 [FEATURE] Zero-Knowledge Encrypted Collaboration — Blind Peer Coding with Homomorphic Diff Sharing

[MindFuq001]

Overview

This feature introduces a Zero-Knowledge (ZK) encrypted real-time collaboration system for opencode-android. Two or more developers can collaborate on the same codebase without either party ever seeing each other's raw source code — only the semantic diff and AI-synthesized merge suggestions are shared, encrypted end-to-end using homomorphic encryption principles adapted for mobile.

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The Problem This Solves

Current collaboration tools (GitHub, pair programming sessions, live share) require both parties to have full read access to the codebase. This is a fundamental security and IP violation in many professional contexts:

• Contractors who must collaborate but cannot expose client source code
• Open source contributors who want to suggest patches without seeing proprietary internals
• Enterprise environments where need-to-know policies conflict with collaboration needs
• Whistleblowers and privacy-critical developers who need plausible deniability

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Architecture: Blind Peer Coding Protocol (BPCP)

Phase 1 — Commitment Scheme

Each collaborator publishes a cryptographic commitment to their current code state:

commitment = SHA3-256(salt || AST_hash || timestamp)

This proves you have code without revealing what it is.

Phase 2 — Encrypted Semantic Diff

Instead of sharing raw code, only the semantic diff vector is shared — a mathematical representation of what changed in meaning encoded in a high-dimensional embedding space, then encrypted with the recipient's public key:

fun encryptSemanticDiff(diff: SemanticDiffVector, recipientPublicKey: ECPublicKey): EncryptedBlob {
    val embedded = DiffEmbeddingEngine.embed(diff) // 768-dim vector
    return ECIESCipher.encrypt(embedded.toByteArray(), recipientPublicKey)
}

Phase 3 — AI-Mediated Merge

The AI model (running locally) acts as a trusted third party that:

• Decrypts the incoming semantic diff in a secure enclave
• Proposes a merge that satisfies both parties' intentions
• Presents the merge to each developer WITHOUT revealing the other's source
• Each developer can accept, reject, or counter-propose

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Zero-Knowledge Proof of Correctness

To prevent malicious collaborators from submitting broken code disguised as valid diffs, every encrypted diff is accompanied by a ZK-SNARK proof that the encrypted content:

1. Compiles without errors
2. Passes a mutually agreed-upon test suite
3. Does not introduce known vulnerability patterns (checked against CVE embeddings)

All of this is verified WITHOUT decrypting the code.

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UI/UX Design

• Collaboration Bubble: A floating bubble shows active blind collaborators as anonymous avatars with randomly assigned color+shape identities
• Diff Heatmap: A heat map of your own file shows where the other party's changes intersect your code — without showing what those changes are
• Trust Score: Each collaborator builds a reputation score over time based on merge acceptance rates and ZK proof validity
• Emergency Reveal: With mutual consent (both parties must agree), a full reveal can be triggered to resolve deadlocks

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Acceptance Criteria

• BPCP handshake completes in < 2 seconds on Android API 26+
• Semantic diff encryption uses 256-bit EC keys stored in Android Keystore
• ZK proof generation completes on-device in < 5 seconds for diffs up to 500 lines
• AI merge mediator runs fully offline
• No raw source code ever transmitted over any network interface
• Trust score persists locally and syncs via encrypted P2P only
• Emergency reveal requires biometric confirmation from both parties

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"Collaborate like you're in the same room. Stay private like you're in different countries."

[MindFuq001]

Closing this issue. It was created here by mistake and has been recreated on the correct repository (MindFuq001/OTG-OC). Apologies for the noise.