Alfred Lu

Overview ZecretPipe is a privacy-first cross-chain messaging service between Starknet and Zcash. Unlike traditional bridges that only transfer tokens, ZecretPipe can transmit arbitrary data (as long as it can be cryptographically proven). This enables advanced use cases beyond simple asset transfers, including: dApp coordination: Cross-chain smart contract interactions and composability Privacy-preserving credentials: Anonymous identity verification and authentication across chains Custom applications: Developers can build their own cross-chain applications on top of ZecretPipe by designing custom payload formats Because ZecretPipe transmits verifiable information rather than just assets, it serves as a general-purpose messaging infrastructure that unlocks true cross-chain interoperability. Starknet ←→ [Messaging Layer] ←→ Zcash ↓ ↓ ↓ Events Relay Memo Field State Verify Transactions Contracts Route Notes The messaging layer provides the following capabilities: Event listening - Monitors state changes on both chains in real-time Message routing - Securely relays messages between chains with encryption Action triggering - Triggers corresponding actions on the destination chain automatically Verification - Ensures message integrity and authenticity of the source through cryptographic proofs > Acts as an orchestrator and relay layer that listens to transactions or state changes on one chain and securely mirrors or triggers corresponding actions on the other (cross chain interoperability). Why ZecretPipe Matters? Infrastructure Play: Building a protocol layer, not just a single application—enabling an entire ecosystem of cross-chain dApps First Mover Advantage: First-ever Starknet ↔ Zcash cross-chain messaging protocol Real Value: Solves actual needs for both ecosystems: Starknet: Gains privacy features leveraging Zcash's zero-knowledge technology Zcash: Gains DeFi composability and smart contract capabilities through Starknet integration Scalability & Extensibility: Today: Starknet ↔ Zcash messaging Tomorrow: Extensible architecture to support any chain Future: Become a universal privacy-preserving cross-chain messaging standard Application Examples > What we can build based on ZecretPipe as Infrastructure. Developers can design their own encoding formats in the payload—such as adding nonce, expiration, signature, etc.—to build custom applications on top of ZecretPipe for message passing and verification. Privacy-Preserving DeFi Bridge (wZEC) Wrap Zcash assets to use in Starknet DeFi protocols Maintain transaction privacy while enabling DeFi composability Bridge liquidity between privacy-focused and DeFi ecosystems Cross-Chain Notifications DeFi protocols notify users about liquidations, yield opportunities, or governance proposals Privacy-preserving alerts that don't reveal user identities or holdings Smart contract events trigger encrypted notifications across chains Anonymous Voting System DAO voting while preserving voter privacy Voting records stored publicly on Starknet for transparency Voter identities verified through Zcash for anonymity Prevents vote buying and coercion while maintaining verifiability Cross-Chain Identity Verification Prove cross-chain identity without revealing the specific address linkage Starknet users prove they control a Zcash address without exposing which one Enable privacy-preserving reputation systems across chains Security and Trust Consideration Relayer Network Design Phase 0 - Centralized MVP Just Zecret Official Relayer Phase 1 - Half Decentralized Relay Node 1 (Starkware) Relay Node 2 (Zcash ECC) Relay Node 3 (Trustworthy Community) Relay Node 4 (ZecretPipe Official) Relay Node 5 (Trustworthy Partner) Phase 2 - Totally Decentralized Relayer Network Reputation Mechanism Challenge Mechanism Staking Mechanism (stake ETH/STRK tokens) Economic Security: Slash malicious relayers & Reward honest behavior Privacy Solution Method A: Subscription Notifications (Lower Privacy) Pros: Real-time notifications, excellent user experience Cons: Relay knows you're expecting messages (metadata leakage) Method B: Stealth Addresses (Medium Privacy) Pros: Recipients can efficiently filter messages meant for them Cons: High technical complexity to implement Method C: Active Scanning (Highest Privacy) Pros: Complete privacy—no one knows you received a message Cons: Requires scanning all messages, lower efficiency