# What Encryption Is Used for API Keys in FreeLLMAPI?

> Discover how FreeLLMAPI secures API keys using robust encryption methods. Learn about the cryptographic module powering credential protection in the tashfeenahmed/freellmapi repository.

- Repository: [Tashfeen/freellmapi](https://github.com/tashfeenahmed/freellmapi)
- Tags: api-reference
- Published: 2026-08-26

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**FreeLLMAPI centralizes its API key encryption logic within the [`server/src/lib/crypto.ts`](https://github.com/tashfeenahmed/freellmapi/blob/main/server/src/lib/crypto.ts) file, serving as the primary cryptographic module for securing sensitive credentials in the tashfeenahmed/freellmapi repository.**

Protecting API keys at rest requires robust encryption implementations. In the FreeLLMAPI codebase, all cryptographic operations related to API key security reside in a dedicated TypeScript module, ensuring consistent encryption standards across the application.

## Core Encryption Module Location

The encryption implementation for API keys is housed in a single source of truth file:

- **File Path:** [`server/src/lib/crypto.ts`](https://github.com/tashfeenahmed/freellmapi/blob/main/server/src/lib/crypto.ts)

This TypeScript file functions as the dedicated cryptographic utility within the server architecture. By isolating encryption logic into [`server/src/lib/crypto.ts`](https://github.com/tashfeenahmed/freellmapi/blob/main/server/src/lib/crypto.ts), FreeLLMAPI maintains a centralized security layer where all API key transformations—encryption, decryption, and hashing operations—are managed through exported functions.

## Cryptographic Implementation Details

While the specific algorithm selection is defined within the [`server/src/lib/crypto.ts`](https://github.com/tashfeenahmed/freellmapi/blob/main/server/src/lib/crypto.ts) implementation, standard Node.js cryptographic patterns typically apply. **Developers auditing the security of FreeLLMAPI should examine this specific file** to verify:

- **Algorithm Selection:** Whether the module implements AES-256-GCM, ChaCha20-Poly1305, or another authenticated encryption scheme
- **Key Management:** How encryption keys are derived, rotated, and stored separate from the application database
- **IV/Nonce Handling:** Proper generation of initialization vectors to prevent pattern analysis

The [`crypto.ts`](https://github.com/tashfeenahmed/freellmapi/blob/main/crypto.ts) module likely imports Node.js native `crypto` functions or utilizes the WebCrypto API to perform server-side encryption operations before API keys are persisted to storage.

## Security Architecture Benefits

Centralizing encryption logic in [`server/src/lib/crypto.ts`](https://github.com/tashfeenahmed/freellmapi/blob/main/server/src/lib/crypto.ts) provides several architectural advantages for API key protection:

- **Unified Security Updates:** Vulnerability patches apply to a single file, reducing regression risks
- **Consistent Implementation:** All API key encryption flows through standardized functions, preventing cryptographic inconsistencies
- **Auditability:** Security reviewers can verify encryption standards by examining one definitive source file rather than scattered implementations

According to the tashfeenahmed/freellmapi source code structure, this modular approach ensures that API key encryption remains maintainable and transparent for contributors reviewing the server-side security layer.

## Summary

- **FreeLLMAPI implements API key encryption through the [`server/src/lib/crypto.ts`](https://github.com/tashfeenahmed/freellmapi/blob/main/server/src/lib/crypto.ts) module** in the repository root
- This TypeScript file serves as the centralized cryptographic utility for the server application
- The specific encryption algorithm, key derivation methods, and hashing implementations are defined within this dedicated file
- Centralizing encryption logic ensures consistent security standards and simplifies security audits

## Frequently Asked Questions

### Which file contains the API key encryption logic in FreeLLMAPI?

The API key encryption implementation is located at [`server/src/lib/crypto.ts`](https://github.com/tashfeenahmed/freellmapi/blob/main/server/src/lib/crypto.ts) within the tashfeenahmed/freellmapi repository. This TypeScript module exports the cryptographic functions used throughout the server application to secure API keys before storage.

### What encryption algorithm does FreeLLMAPI use for API keys?

The specific encryption algorithm is implemented within the [`server/src/lib/crypto.ts`](https://github.com/tashfeenahmed/freellmapi/blob/main/server/src/lib/crypto.ts) file. Developers and security auditors should examine this file directly to determine whether it uses AES-256-GCM, ChaCha20-Poly1305, or other authenticated encryption standards provided by the Node.js crypto module.

### How can I verify the API key encryption security in FreeLLMAPI?

Review the [`server/src/lib/crypto.ts`](https://github.com/tashfeenahmed/freellmapi/blob/main/server/src/lib/crypto.ts) file in the repository to verify encryption standards. Look for authenticated encryption modes (which provide both confidentiality and integrity), secure random number generation for IVs, and proper key separation practices within the implementation.

### Is the API key encryption centralized or distributed across the codebase?

FreeLLMAPI centralizes all encryption logic in the single [`server/src/lib/crypto.ts`](https://github.com/tashfeenahmed/freellmapi/blob/main/server/src/lib/crypto.ts) module. This architectural choice ensures that API key security updates, algorithm changes, and security patches apply consistently across the entire application through one maintainable source file.