Stop Putting LLM API Keys in .env Files

📰 Dev.to · yotta

Securely store LLM API keys using a Rust CLI and macOS Keychain, avoiding .env file vulnerabilities

advanced Published 15 Mar 2026
Action Steps
  1. Build a Rust CLI to interact with macOS Keychain
  2. Store LLM API keys in Keychain using the CLI
  3. Implement a 3-layer defense mechanism to protect API keys
  4. Test the security of the API key storage solution
  5. Configure the CLI to automatically retrieve API keys from Keychain
Who Needs to Know This

Developers and DevOps teams can benefit from this approach to securely manage API keys, reducing the risk of exposure and improving overall system security

Key Insight

💡 Storing API keys in .env files is insecure; use a secure storage solution like macOS Keychain to protect sensitive information

Share This
🔒 Stop exposing LLM API keys in .env files! Use a Rust CLI and macOS Keychain for secure storage 🚀

Key Takeaways

Securely store LLM API keys using a Rust CLI and macOS Keychain, avoiding .env file vulnerabilities

Full Article

How I built lkr — a Rust CLI that stores LLM API keys in macOS Keychain with 3-layer defense. The honest story: building a macOS Keychain CLI in Rust, the security holes we found, the macOS internals we had to fight, and what still isn't solved.
Read full article → ← Back to Reads

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