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

Differentiate between fast fading and slow fading, Differentiate between Fa...

Differentiate between Fast fading and Slow fading Fast fading refers to changes in signal strength among a transmitter and receiver as the distance among the two changes by a s

Why is the authentication and key agreement of 3gpp weak, Question 1: a...

Question 1: a) How is the four-way exchange employed for mutual authentication in WPA/RSN? b) Elaborate on how inquiry attacks and traffic monitoring attacks can be u

Describe how does arp response the request, ARP sent the request in broadca...

ARP sent the request in broadcast, response is unicast When a source sends ARP request the switch broadcast the ARP req. if it doesn't have the destination mac address in its ma

Discuss about the hypertext, Discuss about the Hypertext The hypertext ...

Discuss about the Hypertext The hypertext allows for the integration of text, graphics, audio and video on a webpate. This can make it very easy to browse and very exciting to

How does a firewall protect, How Does a Firewall Protect Firewalls work...

How Does a Firewall Protect Firewalls work by controlling the information that comes in and out of the network. By using the Application Proxy service, the flow of information

Client-server , We need to design and implement a secure conference system....

We need to design and implement a secure conference system. The system will allow users to connect to a conference server and to participate in a shared conversation. The conversat

What is subnet mask, What is subnet mask? A subnet mask is combined wit...

What is subnet mask? A subnet mask is combined with an IP address in order to recognize two parts: the extended network address and the host address. Such as an IP address, a s

Format of hardware address, FORMAT OF HARDWARE ADDRESS:    It have ...

FORMAT OF HARDWARE ADDRESS:    It have of a numeric value and its size is chosen for specific network technology. The length of the message format is one to six bytes.

What is bridged ethernet, Bridged Ethernet Raises bandwidth by divi...

Bridged Ethernet Raises bandwidth by dividing the network into smaller networks allowing concurrent communications Separates collision domains because traffic is lower

What does jade stands for, QUESTION (a) Briefly describe the dire...

QUESTION (a) Briefly describe the direct coordination model and the meeting oriented coordination model (b) What does JADE stands for? (c) Name the three spec

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