On May 23, Mind Network announced the launch of encrypted transfer capabilities supporting Circle's Cross-Chain Transfer Protocol (CCTP), enabling developers and institutions to conduct compliant privacy USDC transfers across multiple supported blockchains. This functionality is realized through the integration of Mind Network with Chainlink's Cross-Chain Interoperability Protocol (CCIP), which provides the messaging infrastructure for CCTP.

This is the first application of fully homomorphic encryption (FHE) in production environments for CCTP transfers. With this update, projects integrating CCTP can hide sensitive transaction metadata such as wallet addresses and transfer amounts without changing Circle's underlying infrastructure or existing integrations.

This encrypted bridge will be open to developers integrating CCTP through CCIP, applicable to multiple networks such as Ethereum, Avalanche, Base, Arbitrum, Optimism, and Solana, ensuring data confidentiality during stablecoin cross-chain transfer processes.

Technical foundation

Mind Network's system introduces FHE and zero-knowledge proof technologies in messages transmitted through CCIP. When a user initiates a USDC cross-chain transfer, CCTP will destroy USDC on the source chain and mint the corresponding amount of USDC on the target chain. CCIP serves as the transport layer to relay this minting instruction between chains.

Mind Network's encryption architecture encrypts payloads during message transmission, ensuring that the receiving address remains encrypted throughout its lifecycle. Only those with authorization or the appropriate encryption keys can process or decrypt the FHE-encoded messages on the target chain.

The FHE Bridge's encrypted bridge is fully compatible with CCTP's standard burn/mint logic, allowing USDC to maintain its on-chain native nature and fungibility. The key difference is that the visibility of transaction information to the outside world (such as analytical tools, bots, or third-party bridge relayers) is significantly reduced.

Additionally, the Mind Network system supports zero-knowledge proof mechanisms, allowing developers and institutions to validate regulatory compliance without disclosing any personal or transaction data. The verification process can be conducted on-chain or completed off-chain by authorized regulators, auditors, or corporate partners.

Privacy integration without modifying infrastructure

This integration does not require any changes to Circle's infrastructure or modifications to existing CCTP deployments. Since CCTP communicates between chains through Chainlink CCIP, and Mind Network has integrated with CCIP's routing and delivery systems, the encryption layer can operate seamlessly as an overlay on existing transmission processes.

Developers can enable encrypted USDC transfers within wallets, dApps, or bridging protocols through Mind Network's SDK, applicable to both permissioned and permissionless systems. For regulated entities, the system can be configured for selective disclosure of transfer data under specific conditions (such as compliance checks, internal audits, or legal proceedings).

Currently launched on multiple EVM-compatible testnets and mainnets such as Ethereum, Arbitrum, and Polygon. More networks will be supported in the future, specifically in conjunction with CCIP's expansion roadmap.

Applications in institutional and regulatory scenarios

Privacy concerns have always been a major barrier for institutions adopting public chains. Most cross-chain bridges and stablecoin transfer mechanisms default to making all transaction information public, including wallet addresses, token amounts, and timestamps, making them susceptible to strategic analysis, competitive detection, or adversary monitoring.

By incorporating an encrypted messaging mechanism into the CCTP process, Mind Network's encrypted bridge offers a new option for institutions seeking confidentiality in cross-chain value transfers, suitable for asset managers, DAOs, family offices, market makers, and other entities operating in competitive or regulatory environments.

In such scenarios, FHE can hide transaction details without sacrificing verifiability. Authorized third parties can audit or certify the validity of transactions without accessing sensitive data, achieving internal control and regulatory compliance without centralized trust or off-chain data verification.

The encrypted bridge also supports stealth addresses and compliance privacy delegation modes, allowing senders and receivers to transfer funds through one-time or non-associated address paths, further reducing on-chain traceability and attribution risk.

Support for tokenized asset circulation

The FHE Bridge can also support scenarios related to tokenized assets (RWA). As institutions explore the tokenized issuance and circulation of financial instruments such as securities and funds, privacy becomes a key design consideration. Especially during cross-chain settlements between multiple networks, user and asset metadata must be concealed as much as possible.

USDC remains the preferred settlement asset for such applications due to its regulatory status and liquidity depth. The newly added compliant privacy transfer feature will help support processes such as private fund deployment, cross-chain asset rebalancing, and multi-chain custody migration.

Mind Network's encryption framework is quantum-resistant and meets emerging fintech regulatory privacy and auditing requirements. Combined with Circle's certified minting mechanism and CCIP's decentralized transmission architecture, this encrypted bridge achieves end-to-end security for stablecoin settlements.

Security and verification mechanisms

Chainlink's CCIP architecture includes a decentralized oracle network and an independent risk management layer to monitor anomalous cross-chain activities. Mind Network's FHE bridge integrates with it without interfering with CCIP's consensus logic, rate limits, or verification processes.

FHE encryption applies only to the message payload, not affecting routing logic or consensus input, ensuring the integrity of cross-chain transfers while limiting data visibility to third-party observers. If a message is formatted incorrectly, tampered with, or fails verification, CCIP will handle the error according to standard procedures.

Developer usability and documentation support

Mind Network has released documentation and SDKs to help developers integrate encrypted CCTP bridges into front-end applications or back-end systems. Projects using CCTP for multi-chain liquidity, stablecoin payments, or fund management can opt to enable encrypted transfer features with minimal integration costs.

The SDK includes configuration tools for setting encryption parameters, adding zero-knowledge proof templates, and generating stealth addresses. For existing dApps, this will reduce the workload of building privacy features or maintaining the complexity of self-built bridging architectures.

Mind Network also supports integration with multi-signature or institutional custody wallets, allowing entities to manage decryption keys or verify permissions through governance processes.

Future

The introduction of FHE encryption provides a new design space for cross-chain financial application developers. Although stablecoin transfers are widely used in DeFi and enterprise applications, most are still publicly visible. Mind Network's integration offers new options for confidential circulation of cross-public chain digital assets.

The current FHE encrypted bridge has officially launched, allowing for compliant privacy transfers on CCTP immediately. As CCTP and CCIP become further adopted in multi-chain ecosystems, this cross-chain facility is expected to become a privacy infrastructure in DeFi, TradFi, and hybrid application scenarios.

As an optional overlay layer, this system does not require changes to the underlying protocol or governance mechanism, allowing it to be compatible with existing systems while smoothly transitioning to emerging ecosystems.

Mind Network indicates that it will expand the system's support for different asset classes, message formats, and programmable privacy logic through more integrations in the future.