A VPN for Virtual Private Network is a system for connecting two or more remote computers while isolating their communication from the rest of the network in which they operate. It is a service that encrypts your exchanges on a network to preserve your identity online and the integrity of your exchanges (files, messages, etc.).


How VPN works.


VPN uses a very complex encryption algorithm, which is the end-to-end encryption protocol. It encrypts the data at the output the sending and decrypts them on arrival when they arrive at the destination machine.


The term tunneling or “tunneling” in English is often used to emphasize that data is encrypted during transit and therefore “invisible”. The latter responds to a need for confidentiality but above all integrity.


When you connect on the Internet, wanting to consult a website, your Internet service provider receives the request and redirects you to the site in question. Your web traffic goes through it, so it can see all your online activities, or even transmit your browsing history online to advertisers for advertising or to the authorities of a country that lacks freedom.


How can a VPN help you?


  1. Preserve your anonymity online.


Being a personal identifier assigned to your machine once on the Internet, the IP address can reveal the device you use (PC, Tablet, Mobile …), your location and many other elements. With a VPN, it is possible to hide all these details or to give you false details and thus keep total anonymity.


In fact, how is this going?


You first connect to a VPN server, then the latter encrypts your messages, then assigns you a new IP address. It is thanks to this new IP address that you will surf without risking being identified.


  1. Bypassing and escaping government censorship.


Thanks to whistleblowers like Edward Snowden, we now know that local authorities and foreign governments have taken widespread surveillance measures both locally and abroad.


A reliable VPN that does not record data in the logs ensures your protection not only from ISP but also from government oversight.


Many governments around the world are censoring the web thus restricting the right to publish articles or to express themselves, thus preventing their citizens from having access to the internet, or with a VPN, it is possible to bypass any internet censorship. To do this, you must connect to a VPN server and redirect your traffic data exchanges on the Internet to a trusted channel.


Your data over the network is encrypted and no one can know it.


  1. Avoid marketing targeting and advertising spamming.


In some countries, such as the USA, some ISP sell their customers’ data to the highest bidders, which causes them to be riddled with ads.


To avoid this, you can install a VPN to encrypt your browsing data and replace your IP address so it is almost impossible to go back to you.


A VPN will allow you not to leave an imprint on the Internet that can be exploited by your ISP or other searchers to pursue you.


Thanks to a VPN service, you can also easily remove or prevent the installation of cookies on your computer or mobile. These are files installed on your browser sometimes without your knowledge when you visit a website. These “cookies” allow sites to remember you and study your behavior as a user on the net for marketing purposes.


  1. Protect yourself from government surveillance.


In some regimes where there is a lack of freedom and democracy, the crackdown on political leaders and activists is well-established.


Faced with these oppressions, the latter to guarantee their security must keep certain anonymity especially from the media point of view. To do this, a VPN service is definitely of great use because it guarantees total anonymity. They can thus express themselves and make their voices heard in peace.


Dictators watch over the Internet people with political orientations that go against the established regime. The chances of being captured and oppressed become greater.


  1. Do you share files on peer-to-peer networks?


File sharing in a peer-to-peer network is one of the best ways to quickly share large amounts of data across a network.


Despite these uses for legitimate purposes, some ISPs prevent their customers by reducing their bandwidth. The use of a VPN makes sharing invisible to ISPs allowing you to take full advantage of this service.


  1. Keeping the data integrity to protect against the attack of the middle man.


A hacker can in certain cases intercept data that pass over the Internet and modify, alter, falsify, delete something, add something else (inject a virus for example), etc. In this case, the integrity of the data will be compromised because the data received are no longer the same as those sent, i.e. the data are no longer intact.


In English, have said “Data Tampering” which means data manipulation. This type of attack is very dangerous and can be solved simply with a VPN.


Types of VPN.


These are categorized essentially according to the encryption protocol used. The latter designates how messages are encoded when sending. There are thus several types of encryption protocols, namely:


  • L2F developed by Cisco Systems which is so far obsolete.
  • PPTP developed by Microsoft.
  • GRE still developed by Cisco Systems.

IPSec which remains one of the most used encryption protocols to date. It was developed by IETF.


How to have a VPN?


There are several types of which some are installed by default, that is to say, that are installed by default on browsers like Opera, others can be easily downloaded from the internet and completely free, and finally others sold on the internet. Several choices are thus available to you. You can also base your choice on the desired level of security. Here are some of the most popular VPN:


  • Pure VPN
  • North VPN
  • Express VPN



Is there a problem with using a VPN?


The use of a VPN slows the speed during your navigation this is even more important if the encryption protocol is very high level (level 3 for example). Indeed, to ensure complete anonymity on the internet, the VPN must encrypt all your data and the encryption process slows down the connection. To reduce the latency, you can prioritize for example the VPN server closest to you (location) in the settings of your VPN.