Feature Request: Implement Secure Key Exchange and Data Encryption in RUDP Handshake

[alec1o]

Feature Request: Implement Secure Key Exchange and Data Encryption in RUDP Handshake

Summary:

Add a secure key exchange and data encryption process to the RUDP handshake phase. This enhancement will ensure that all data transmitted over RUDP is encrypted, protecting against unauthorized access and ensuring data integrity.

Proposal:

1. RSA Key Exchange in Handshake:

   • During the handshake phase, the server generates an RSA key pair.
   • The server sends the RSA public key to the client as part of the handshake.
   • The client generates a random AES key and encrypts it with the server's RSA public key.
   • The client sends the encrypted AES key back to the server.
   • The server decrypts the AES key using its private RSA key.

2. AES Data Encryption:

   • After the handshake, both client and server use the exchanged AES key to encrypt and decrypt all subsequent data sent over RUDP.

3. Versioning and Compatibility in Handshake:

   • Introduce a version string in the handshake process to ensure the client and server are using compatible versions of the application.
   • The version string should be unique (e.g., using a GUID) to prevent older or unauthorized clients from connecting.

4. Error Handling:

   • If the version string doesn't match or if key exchange fails, the connection will be rejected with a clear error message.
   • The rejection should be handled securely, without revealing additional information, to avoid exposing potential vulnerabilities.

Benefits:

• Securely encrypts data during transmission over RUDP.
• Ensures only compatible and authorized clients can establish a connection.
• Integrates seamlessly into the existing handshake process.

By implementing this feature during the handshake phase, we ensure that all connections established through RUDP are secure from the outset, providing robust protection for data transmission.