Encryption authentication - point to point , Computer Networking

Assignment Help:

Encryption Authentication

One common  technique  used to encrypt and authenticate in VPNs is IP security. IP sec  is a collection of protocols designed by the IETF( Internet Engineering  Task Force) to provide  security for a packet carried by the internet. instead it provides a framework and  a mechanism it leaves the selection of the  encryption authentication method  to the user.

IP sec  uses an authentication heard. The  authentication header  is an extra header  added to the data packet at the transport layer before  the IP  header is added.

When  an IP datagram carries an authentication header the protocols  field sin the IP header changes to a value of 51 show that the  datagram carries an AH A  field inside  the AH defines  the original  value  of eh protocols fields.

IP sec  uses  a mechanism  called encapsulation security  payload. ESP first  the  data  packet at the  transport layer  then  adds one extra header and one  extra trailer.

The ESP  header  define the algorism used for encryption. The ESP  trailer aligns the  packet  to the length required by some  encryption  algorithms. The ESP  trailer aligns tains  the authentication data  for the  whole packet excluding the IP  header. The value  of the  protocols  fields is 50 in the IP header  to indicate the use  of ESP.


Related Discussions:- Encryption authentication - point to point

How firewall configuration makes all the difference, How Firewall configura...

How Firewall configuration makes all the difference The greatest blunder that any company make is to just install a firewall and think that they have ensured perfect securit

Determine the maximum output current, A logic gate drives a load, which has...

A logic gate drives a load, which has a resistance of 1 kÙ and a capacitance of 20 pF. The printed circuit track connecting the gate to its load has an 40 pF capacitance to ground.

Factor price, who are experts who lecter on factor price?

who are experts who lecter on factor price?

State about the international standardization, State about the internationa...

State about the international standardization There are many examples, certainly. Some systems for which there is international standardization include compressed disc players

Modify the tcp server and udp server in client server, Let's imagine that w...

Let's imagine that we have 2 TCP clients. A simple one (modTCPClient.c) like the one you wrote in the first part of project 2 and another one (modTCPClient1.c) that after it connec

Difference between tftp and ftp application layer protocols, What is the di...

What is the difference between TFTP and FTP application layer protocols? The Trivial File Transfer Protocol (TFTP) allows a local host to obtain files from a remote host but d

Error correction in burst error correction, Q. Error Correction in Burst Er...

Q. Error Correction in Burst Error Correction? Error Correction-Burst Error Correction In its place of sending all the bits in a data unit together we can organize "N

Explain short message service, Question: (a) Short Message Service (SM...

Question: (a) Short Message Service (SMS) is a service available on most mobile phones that allows the sending of short messages between mobile phones, other handheld devices

Assignment help, Hello there i have an assignment in Data communication an...

Hello there i have an assignment in Data communication and networks. I have done most of the assignment but i am stuck in one part which is designing a network in a university cam

Write Your Message!

Captcha
Free Assignment Quote

Assured A++ Grade

Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!

All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd