Back بروتوكول المصادقة بتحدي التصافح Arabic Çağırış-əlsıxma autentifikasiya protokolu Azerbaijani Challenge-handshake authentication protocol Czech Challenge Handshake Authentication Protocol German Challenge-handshake authentication protocol Greek Challenge-Handshake Authentication Protocol English CHAP Spanish CHAP Basque پروتکل چالش - دستدهی تأیید هویت Persian Challenge-Handshake Authentication Protocol French
In informatica il CHAP (acronimo di Challenge-Handshake Authentication Protocol) è un protocollo di autenticazione che identifica un utente presso un Internet Service Provider.
La RFC 1994: PPP Challenge Handshake Authentication Protocol definisce lo standard del protocollo.