PEAP

Protected Extensible Authentication Protocol (PEAP) is a security protocol used in wireless networks to provide secure authentication and encryption of data transmitted between a client and a server. It is an extension of the Extensible Authentication Protocol (EAP), which is a framework for transporting authentication data that is used in a variety of networks, including wired and wireless. PEAP combines a transport layer security (TLS) tunnel with the speed of EAP. Within that TLS tunnel, the entire communication between a client and a server is secure. PEAP doesn't specify a particular approach. Instead, it suggests connecting several EAP mechanisms in a chain.

PEAP works in three steps:

1. Authentication of the server. The client first authenticates the server by verifying the server's certificate. This ensures that the client is connecting to the correct server.
2. EAP authentication. Once the server has been authenticated, the client and server then proceed to authenticate the user. This can be done using a variety of methods, such as username and password, certificate, or smart card.
3. Key exchange. Once the user has been authenticated, the client and server then exchange keys that will be used to encrypt all subsequent communication.

The authentication protocols EAP (Extensible Authentication Protocol) and PEAP (Protected Extensible Authentication Protocol) are both used to authenticate users in a network securely. EAP is a generic framework that allows different authentication methods to be used within it, such as certificates, one-time passwords, and biometric authentication. EAP is typically used in wireless networks, VPNs (Virtual Private Networks), and other types of network authentication systems. PEAP, on the other hand, is a specific implementation of EAP that was designed to provide a secure authentication method for wireless networks. Generally, PEAP uses a server-based authentication process in which the server authenticates the client, rather than the client authenticating itself to the server. It also uses encryption to protect the communication between the client and the server.

PEAP (Protected Extensible Authentication Protocol) uses TLS (Transport Layer Security) encryption to protect the communication between the client and the server during the authentication process. TLS is a widely used encryption protocol that provides secure communication over the internet by establishing an encrypted link between two devices. PEAP also uses a variety of other security measures to ensure the integrity and confidentiality of the authentication process, including certificate-based authentication and password-based authentication.