SDKs & Tools

Asymmetric Key Generator

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The Asymmetric Key Generator is a utility for generating Ed25519 and RSA asymmetric key pairs (private and public keys) used for authenticating and signing requests to Binance APIs.

It is commonly used when working with asymmetric authentication, such as FIX APIs or REST / WebSocket APIs that support RSA or Ed25519 signatures.

For source code, releases, and updates, see the asymmetric-key-generator repository on GitHub.

Supported key types

The tool can generate the following key types:

• Ed25519 (PKCS#8)
• RSA-2048
• RSA-4096

⚠️ Important

Some Binance APIs (for example FIX APIs) require Ed25519 keys. RSA keys are supported only by APIs that explicitly allow RSA authentication.

Supported environments

• Desktop environments (macOS, Windows, Linux) via prebuilt apps
• Node.js (for CLI and local builds)

Installation options

You can use the tool in three different ways, depending on your workflow.

Option 1: Download prebuilt application (recommended)

Prebuilt desktop applications are available on the GitHub Releases page. After downloading, verify the package integrity using the provided checksum:

Code
sha256sum -c AsymmetricKeyGenerator-<version>.CHECKSUM

If successful, the output will indicate OK.

Option 2: Build from source

Clone the repository and build the application locally:

Code
npm install
npm run start      # run locally
npm run dist       # build distributables into the dist folder

Option 3: Command-line usage

The generator can also be used as a CLI tool.

Install dependencies:

Code
npm install

Generate key pairs:

Code
npm run generate -- -k <key-type> -p <passphrase> -n <count> -o <output>

Examples

Generate a single RSA-2048 key pair:

Code
npm run generate -- -k rsa-2048 -o id_rsa.tar.gz

Generate two Ed25519 key pairs with a passphrase:

Code
npm run generate -- -k ed25519 -p mySecretPassphrase -n 2

UI usage

The desktop application provides a simple graphical interface:

1. Open the application
2. Select the key type (Ed25519 is recommended in most cases)
3. Click Generate Key Pair
4. Save the private key securely (never share it)
5. Save the public key to upload or distribute as required

Typical use cases

• Generating Ed25519 keys for Binance FIX APIs
• Generating RSA keys for REST or WebSocket APIs that support asymmetric authentication
• Rotating API credentials securely
• Local development and testing of signed API requests

Security best practices

• Never share your private key
• Store private keys securely on disk or in a secrets manager
• Use passphrases where supported
• Upload only the public key to Binance
• Rotate keys periodically and revoke unused credentials