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CHAP - Challenge/Handshake Authentication Protocol

Challenge/Handshake Authentication Protocol is a system for determining if a user has the correct password without openly revealing that password. CHAP does not itself prevent unauthorized access; it merely identifies the remote end. The NAS (Network Access Server) application then determines whether that user is allowed access to the protected resources.


  • Fully interactive 3GPP based network map
  • Narrated call flows
  • Detailed network procedures

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