VPN est l’abréviation de « virtual private network » (réseau privé virtuel) et désigne un service qui protège votre connexion Internet et votre confidentialité en ligne. Il crée un tunnel chiffré pour vos données, protège votre identité en ligne en masquant votre adresse IP et vous permet d’utiliser les points d’accès Wi-Fi publics en toute sécurité.
Pourquoi avez-vous besoin d’un VPN ?
Personne n’aime être surveillé ou suivi, même s’il n’a rien à cacher. C’est pourquoi il est important de renforcer vos défenses en matière de confidentialité. Lorsque vous naviguez via un VPN, votre activité sur Internet est chiffrée de sorte que personne ne peut voir ce que vous faites en ligne. Voici d’autres raisons pour lesquelles vous avez besoin d’un VPN :
En général, lorsque vous essayez d’accéder à un site Web, votre FAI (fournisseur d’accès à Internet) reçoit la demande et vous redirige vers votre destination. Tandis que lorsque vous vous connectez à un VPN, il redirige d’abord votre activité Internet à travers un serveur VPN, avant de l’envoyer à votre destination. Voici ce qui se passe lorsque vous vous connectez à un VPN :
Le VPN change votre adresse IP et masque votre emplacement
Les personnes travaillant dans des pays où la liberté d’expression est limitée dépendent d’une connexion Internet privée pour leur travail. Leur vie peut même parfois en dépendre. Les personnes qui vivent sous un régime autoritaire devraient utiliser un VPN pour masquer leur adresse IP et garantir une sécurité supplémentaire pour leurs messages sensibles.
Fonctionnement d’un VPN
Il existe de nombreux types de VPN différents, mais nous allons nous concentrer ici sur le VPN grand public, celui que NordVPN offre. Lorsque vous téléchargez un logiciel VPN basé sur le client sur votre appareil, il effectue la majeure partie du travail à votre place : il vous suffit de vous identifier et de vous connecter.Cependant, il est utile de savoir comment fonctionne un VPN pour mieux comprendre le service. Voici ce qui se passe en coulisses :
Lorsque vous vous connectez à un service de réseau privé virtuel, celui-ci authentifie votre client auprès d’un serveur VPN.
Le serveur applique ensuite un protocole de chiffrement à toutes les données que vous envoyez et recevez.
Le service VPN crée un « tunnel » chiffré sur Internet. Cela sécurise les données qui circulent entre vous et votre destination.
Pour garantir la sécurité de chaque paquet de données, un VPN l’enveloppe dans un paquet externe, qui est ensuite chiffré par encapsulation. C’est l’élément central du tunnel VPN, qui assure la sécurité des données pendant leur transfert.
Lorsque les données parviennent au serveur, le paquet externe est supprimé via un processus de déchiffrement.
Comment fonctionne le tunneling VPN ?
Le tunnel VPN est créé en authentifiant d’abord votre client (un ordinateur, un smartphone ou une tablette) auprès d’un serveur VPN. Le serveur utilise ensuite l’un des nombreux protocoles de chiffrement pour s’assurer que personne ne puisse surveiller les informations qui circulent entre vous et votre destination en ligne.
N’oubliez pas qu’avant d’être envoyées et reçues sur Internet, les données doivent d’abord être divisées en paquets. Pour garantir que chaque paquet de données reste sécurisé, un service VPN l’enveloppe dans un paquet extérieur, qui est ensuite chiffré par un processus appelé encapsulation.
Ce paquet extérieur maintient la sécurité des données pendant le transfert, et il constitue l’élément central du tunnel VPN. Lorsque les données arrivent sur le serveur VPN, le paquet extérieur est retiré pour accéder aux données qu’il contient, ce qui nécessite un processus de déchiffrement.
Comment fonctionnent les serveurs VPN ?
Une fois le tunnel VPN établi, votre appareil envoie des informations chiffrées (comme le site Web que vous voulez visiter) au serveur VPN. Celui-ci les déchiffre et transmet les informations au serveur Web désigné. Il masque également votre véritable adresse IP avant d’envoyer les données. Au lieu de cela, vous utiliserez l’adresse IP du serveur VPN auquel vous êtes connecté(e).
Lorsque le serveur Web répond, le serveur VPN chiffre les données et vous les envoie par le biais de votre FAI. Votre client VPN déchiffre les données lorsqu’elles atteignent votre appareil.
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The elder was very happy, while the other Dongtian people were gnashing their teeth.Except for the patriarchs and young patriarchs of the past, no one else can enter at all.
Its strength is unmatched, and netizens please remind Please pay attention to rest your eyes when reading for a long time.Xian er said, you go to a distant place first, protect yourself, and leave this guy to me.
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Patriarch Xiao also exclaimed, Phantom Sound Nine Heavens Have you practiced the phantom music to such an extent The other elders were also shocked, and the phantasmagoria was divided into many realms.In addition, there is also the background of the Zifu.
Therefore, these great sages use artifacts that have been handed down The appearance of such a piece of metal now really makes the eyes of the two great sages red.Looking at the retreating figures of these people, Lin Xuan said coldly, you can leave, but he can t.
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Xiaoyao was hunted down and came back, he has changed.Okay, let s go together, Lin Xuan nodded, and then he looked at Ye Wudao and asked, Wudao, where do you plan to go next Ye Wudao said, I originally came out to travel and practice, and now I have seen the Tianjiao in the ancient city of Taiqing, and I am going to another ancient city next.
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The phantom of Suzaku swept all directions. Lin Xuan held the Spear of Destruction and opened and closed.But on the third day, a figure came out. It was Lin Xuan, the man from Qianshan Cave, who roared first, and the other people from the cave also moved out one after another.
After waiting for so many years, I finally waited for the two of you.
He had already withdrawn from Xianwu Academy and was not in danger.Assassination hall, the first helmsman Wuying, the northeaster After the words fell, there was already an extra figure on the Bazhen chess game, it was Wuying.
Feeling this energy, Lin Xuan s scalp tingled, while the pale figure in front of him sighed.In Lin Xuan s hand is a primitive feather of the Sky Youque, which contains the original flame.
Venerable Qinglian took a deep breath, and said in a deep voice Remember what you said today, and don t become the second Black Dragon Sect.Otherwise, there would have been piles of Kings on the Tianwu Continent, and there would be only a few of them until now.
He had never been so underestimated before. One must know that he is the King of Three Stars, and he is also the capable general under the Third Prince.Netizens please remind Please pay attention to rest your eyes when reading for a long time.
Among the younger generation, very few people can compete with Yan Feng.Thinking of this, Duan Sirius looked back. When he saw the sarcasm hanging from the corner of Lin Xuan s mouth, he immediately became more sure of what he was thinking.
As long as the other party showed a flaw, they could immediately attack.He was about to explode, but was stopped by Elder Qingyun.
Go, keep going. Lin Xuan took the lead, thinking about walking ahead, and behind him, Dark Red Shenlong and Zhao Xue also followed quickly.Lin Xuan nodded with satisfaction. This sword energy is formed by the fusion of the golden artistic conception and the thunder artistic conception.