Protected Extensible Authentication Protocol

Protected Extensible Authentication Protocol, Protected EAP, or simply PEAP (pronounced "peep"), is a method to securely transmit authentication information, including passwords, over wireless networks. It was jointly developed by Microsoft, RSA Security and Cisco Systems. It is an IETF open standard.

PEAP uses only server-side public key certificates to authenticate clients by creating an encrypted SSL/TLS tunnel between the client and the authentication server, which protects the ensuing exchange of authentication information from casual inspection.