The popular DeFAI currency Nillion is about to be launched! Nillion shows how to not give AI agents the chance to violate security

The two main wishes of decentralized finance (DeFi) have always been to improve the user experience and strengthen security. These two are the keys to attracting the next billion users into the Web3 world. However, over the years, complex interfaces, rigid terminology, and cumbersome operational processes have deterred many potential users. Now, DeFAI (AI-driven DeFi applications) and Nillion are working together to change the status quo, bringing new solutions with artificial intelligence (AI) and innovative security technologies to provide users with a simple, intuitive, and secure DeFi experience.

The new project Nillion, which announced the mainnet launch in February 2025 at the end of last December, has recently demonstrated the security protection capabilities of Nillion for AI agent applications, which has made the secret verification participants who are looking forward to the Nillion airdrop even more excited about its development this year. Nillion may be one of the hottest AI tokens currently.

(Nillion successfully completed the Verifier program, with the community collaboratively completing 195 million secret verifications)

What is DeFAI? Redefining the DeFi interaction experience with AI

Imagine your DeFi experience being as simple as chatting with ChatGPT. This is the vision that DeFAI aims to achieve: replacing cumbersome operations with a natural language interface, allowing users to complete financial transactions through dialogue. From asset management to transaction execution, the DeFAI AI agent can automatically handle operational details, making DeFi more intelligent and user-friendly.

Security is of paramount importance: Nillion's secret weapon SecretSigner

While user experience is important, another core challenge for DeFi is security. Here, Nillion's SecretSigner tool plays a critical role. It provides a secure foundation for DeFAI's intelligent agents, allowing users to trust the agents to execute transactions without worrying about private key leaks or asset theft.

DeFAI and Nillion collaborate to strengthen security: Essential infrastructure for AI agents

How can DeFAI's intelligent agents achieve both intuitiveness and security? This is inseparable from the support of Nillion's Signature technology. The following are the key tools and how they work:

1. The secure signing function of Nillion LangChain tools

Nillion's SecretSigner technology allows users to store the private key of their ETH account as "secret" data and grant the AI intelligent agent the permission to perform signing operations. It's worth noting that the agent never directly "sees" or handles the plaintext private key, but can only execute signing operations in a secure environment. Users always maintain control and can revoke the agent's computing permissions at any time to ensure security.

2. Tools for creating DeFi transaction workflows

To simplify DeFi operations, the AI intelligent agent is equipped with specialized transaction tools that cover the full process management, from token swaps to transaction creation:

• Swap tool: The agent can perform price queries, find the best token exchange rates on platforms like Uniswap, and evaluate liquidity to optimize transaction execution.
• Transaction builder tool: The agent can generate swap transactions or token approval transactions, automatically calculating slippage, gas fees, and token amounts to ensure correct transaction execution.

Through Nillion's infrastructure and tools, the DeFAI intelligent agent can complete all transaction details while ensuring the security of the private key.

Nillion's technical application: Preventing AI agents from compromising security

Nillion released a demonstration video of this technology on 1/18, where you can see how the user requests the AI agent to "buy tokens", and Nillion ensures the security.

• Store Private Key: The user stores the ETH private key in Nillion and grants computing permission to the AI agent.
• Simulate Transaction: The user instructs the agent to purchase $1 worth of ETH. The following operations are handled entirely by the agent:
  1. Check Data: The agent queries the price and liquidity to ensure the transaction is feasible.
  2. Authorize Tokens: The agent generates an authorization transaction, allowing the Router to use the user's USDC, and uses Nillion to securely sign the transaction.
  3. Execute Swap: The agent creates a swap transaction, sets all parameters (such as slippage and gas fees), and uses Nillion to sign and complete the transaction.
  4. Receive Tokens: After the transaction is completed, the user receives the swapped WETH and can view the on-chain result using the transaction hash.

The Future of DeFi: Intuitive, Intelligent, and Secure

This demonstration proves that the DeFAI agent, combined with Nillion's signing technology, makes decentralized finance simpler and more secure. From querying data to signing transactions, the AI-powered agent automatically handles the tedious steps, allowing users to participate in DeFi without delving into technical details. This intelligent and secure approach will be a key driving force for the mass adoption of DeFi.