Security Fixes:
- CRITICAL: Add zeroize on drop for FinancialProver to prevent memory extraction
- HIGH: Fix WASM type import (ProdVerificationResult -> VerificationResult)
- MEDIUM: Add input validation for zero rent/multiplier/budget values
- Use checked_mul instead of saturating_mul for overflow detection
Performance Optimizations:
- Reduce generator memory from 16 MB to 8 MB (1-party vs 16-party)
- Add zeroize dependency (1.8) for secure memory clearing
Documentation:
- Add comprehensive ZK performance analysis docs
- Add benchmark suite for criterion testing
- Add optimization quick reference and examples
All 7 production ZK tests pass.
Security Fixes:
- Remove blinding factor from Commitment struct (was leaking secrets)
- Add per-installation unique salt for key derivation (was hardcoded)
- Add prominent security warnings to zkproofs.rs (demo-only crypto)
- Document that ZK implementation is for API demonstration only
Performance Fixes:
- Fix memory leak: category_embeddings now uses HashMap instead of Vec
- Add LRU-style eviction at 10k embeddings capacity
- Prevents unbounded memory growth that would crash browser
Code Quality:
- Add max_embeddings configuration option
- Better documentation for data structures
- Add security audit report and optimization guides
⚠️ IMPORTANT: The ZK proof cryptography is simplified for demonstration.
For production use, replace with bulletproofs, curve25519-dalek, merlin crates.
Implements ZK proofs that allow users to prove financial statements without
revealing actual numbers. Key features:
- Bulletproofs-style range proofs (no trusted setup required)
- Pedersen commitments to hide actual values
- Proof types: income, affordability, savings, overdraft, debt ratio
- Complete rental application proof bundle
- All proof generation runs in browser WASM
Components:
- examples/edge/src/plaid/zkproofs.rs: Core ZK proof system
- examples/edge/src/plaid/zk_wasm.rs: WASM bindings for browser
- examples/edge/pkg/zk-financial-proofs.ts: TypeScript API
- examples/edge/pkg/zk-demo.html: Interactive demo
Use cases:
- Rental applications: Prove income ≥ 3× rent without revealing salary
- Loan pre-qualification: Prove DTI ratio without revealing debts
- Employment verification: Prove minimum salary without exact pay
- Account stability: Prove no overdrafts without transaction history
Privacy guarantee: Verifier mathematically CANNOT extract actual numbers
from the proof - only learns whether statement is true or false.
Implements a privacy-preserving financial learning system that runs entirely
in the browser using WebAssembly. Key features:
- PlaidLocalLearner: Browser-local ML engine with IndexedDB persistence
- Q-learning for budget optimization and spending recommendations
- HNSW vector index for semantic transaction categorization
- Spiking neural network for temporal pattern recognition
- Anomaly detection for unusual transaction flagging
- Zero data exfiltration - all learning stays client-side
Components:
- examples/edge/src/plaid/mod.rs: Core Rust learning algorithms
- examples/edge/src/plaid/wasm.rs: WASM bindings for browser
- examples/edge/pkg/plaid-local-learner.ts: TypeScript API wrapper
- examples/edge/pkg/plaid-demo.html: Interactive demo page
- examples/edge/docs/plaid-local-learning.md: Comprehensive documentation
Privacy guarantees:
- Financial data never leaves the browser
- Optional AES-256-GCM encryption for IndexedDB storage
- User can delete all data instantly
- No analytics, telemetry, or tracking
