4 Way Hand Shaking Method: Learn About Its Functionality and Applications

Four-Way Handshake

The four-way handshake is an authentication protocol used in Wi-Fi networks to ensure that both the access point and client have the necessary credentials to communicate. This process begins when the client sends a request to join the network, which the access point then confirms. After this initial exchange, the four-way handshake takes place, verifying the identity of both devices and establishing a secure connection.

The Four Steps of the Four-Way Handshake

The four-way handshake follows a specific sequence of events that must be completed for the connection to be established. Each step involves one or both sides sending messages:

• Step 1: The client sends a message to the access point requesting access. This includes the client's nonce (a number used once), which will later be used to prove the client's identity.
• Step 2: The access point sends a reply containing its own nonce, plus other information such as the encryption method being used.
• Step 3: The client responds with a message containing both nonces, plus a MIC (message integrity code) to verify that the message has not been tampered with.
• Step 4: The access point sends a final message containing both nonces and its own MIC, completing the handshake and allowing the client to join the network.

Benefits of the Four-Way Handshake

The four-way handshake ensures that the correct credentials are supplied before allowing a connection to be established. This helps to protect against any malicious attempts to access the network. It also provides an additional level of trust by encrypting all data sent over the connection, helping to keep it safe from eavesdroppers.