Challenge handshake authentication protocols (chap), Computer Networking

Challenge Handshake Authentication Protocols (CHAP)

CHAP as its an implies implements  a form of authentication that  requires a challenge  and a response. A CHAP authenticator challenge its client  peer with  its CHAP name  and a random string. The  client  must transform this  random string with a computation algorithm and a CHAP secret key. It  then returns the result with its own name. The  challenge  evaluates the reply with its own copy  of he secret key. Then it forwards a success or failure acknowledgment.  CHAP packets  when host a  is the authenticator.  In summary CAHP  is a three way handshake consisting of a challenge a response, and an acknowledgment.

The  challenge  response and response computation are all built in to PPP software. Users need to  supply a CAHP name and  a secret key known by both endpoints of the PPP connection. As long as both  endpoints  use the same kys a CAHP reply matches what the CAHP challenger expects. The important security  characteristics of CHAP is that PPP endpoints  never keys in  plain  text through  the PPP  CHAP can extend the list of  cryptographically  one way functions  used for  computing CHAP response. When PPP endpoints  negotiate CHAP authentication an I. C. P  configure request packet caries the authentication protocol 0x023 option.

After PPP endpoints agree to use CHAP  authentication the CHAP packets  to exchange appear as in  CHAP  packets include four different messages, as  distinguished by different  codes. Challenge response  success and failure.

Posted Date: 3/18/2013 11:33:34 PM | Location : United States







Related Discussions:- Challenge handshake authentication protocols (chap), Assignment Help, Ask Question on Challenge handshake authentication protocols (chap), Get Answer, Expert's Help, Challenge handshake authentication protocols (chap) Discussions

Write discussion on Challenge handshake authentication protocols (chap)
Your posts are moderated
Related Questions
The most difficult representatives of shared memory programming models are thread libraries present in mainly of the modern operating systems. Some examples for thread libraries ar

What is Remote Procedure Call (RPC)? RPC hides the intricacies of the network by using the ordinary process call mechanism familiar to every programmer. A client process calls

Q. What are the TCP Services? TCP - Services Full Duplex Service Connection Oriented Service Reliable Service

Determine the use of Icon A small picture or graphic used to represent a location in the inter- or Intranet (for example a flow-chart graphic to take the user to the departm

Clipper is a compiler that was well recognized at the time of80's and early times of 90's. We can build DOS based applications (even large applications too) using clipper. There is

LAN Topologies The term topology explains the geographic arrangement of networking devices. It explains the actual layout of the network hardware. Given the location of worksta

Explain ISO's OSI Architecture The Open System Interconnection (OSI) is a standard reference model for communication among two end users in a network. It is used in developing

CONNECTION MULTIPLEXING:  In various circumstances transceiver can be in convenient e.g. workstations in a LAN. Connection multiplexer acts multiple computers to a single tran

A UDP header does not have Sequence number and Acknowledgement number fields. Is it an advantage or a disadvantage? Explain your answer in detail. User Datagram Protocol Th

What metrics are used by routing protocols to verify the best path?