In an age where cryptocurrency and digital assets are becoming increasingly prevalent, securing cryptographic keys and secrets is crucial. Enter blockchain-crypto-mpc, an open-source library developed by Unbound Security. This library employs secure multiparty computation (MPC) to protect your cryptographic keys.

1. Introduction to blockchain-crypto-mpc

As of September 1, 2021, support for the blockchain-crypto-mpc repository will cease, but the library still serves as a significant tool for developers. It enables secure management of cryptographic keys—often the Achilles’ heel of blockchain applications.

2. Who Should Use It?

If you’re a developer focused on creating a wallet or custody platform for cryptocurrency, you’re in the right place! This library provides:

• No single point of compromise.
• A high level of protection by splitting keys into shares stored on separate machines.
• Continuous refresh of key shares to fend off attacks.

It allows the secure handling of keys while ensuring that no complete key material exists at any single point, enhancing safety in an otherwise risky environment.

3. What’s Included?

The blockchain-crypto-mpc library includes:

• 2-party ECDSA secp256k1: generation and signing
• 2-party EdDSA ed25519: generation and signing
• 2-party BIP32: generation and derivation
• Zero-knowledge backup

Written primarily in C++, the library requires the OpenSSL dependency but can be compiled on various platforms.

4. Typical Use Cases

4.1 Endpoint Server Use Case

Wallet service providers can leverage a combination of a user’s endpoint device and a server, ensuring that any cryptographic operation necessitates cooperation from both parties.

• Non-repudiation: Both devices must agree on any transaction.
• No key data is ever revealed in the clear during its lifecycle.

4.2 Mobile-Laptop Use Case

This use case involves a mobile phone and a laptop used by the same owner. Each device retains part of the crypto key, enabling secure operations only if both devices are present.

• Transaction approval requires cooperation from both device apps.
• Independent key management for enhanced security.

4.3 Backup Mechanism

The library introduces a unique zero-knowledge backup mechanism that ensures public verifiability without ever exposing the private key.

5. Troubleshooting

While using blockchain-crypto-mpc, you might encounter issues related to key management or implementation. Here are some troubleshooting tips:

• Ensure your setup adheres to MPC guidelines; split shares must be stored securely on different machines.
• Check for proper dependencies and library compatibility across platforms.
• If you face any security vulnerabilities or bugs, remember that support ended on September 1, 2021, and official fixes won’t be provided.

For more insights, updates, or to collaborate on AI development projects, stay connected with fxis.ai.

6. Conclusion

At fxis.ai, we believe that such advancements are crucial for the future of AI, as they enable more comprehensive and effective solutions. Our team is continually exploring new methodologies to push the envelope in artificial intelligence, ensuring that our clients benefit from the latest technological innovations.

With the robust features offered by blockchain-crypto-mpc, you can confidently enhance the security of your blockchain applications. Happy coding!