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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Lin Haoming was also slightly surprised by this method, and he didn t panic at all.Of course, this is also because most of the relics obtained are from the golden core stage, otherwise the merits that can be obtained will be more.
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In a short while, Lin Haoming found a cave under the water, obviously it should be the lair of the strange insect.That s why the Cai family made this decision and gave our share to the Zeng family.
It s just a customer. Seeing that he was awake, Lin Haoming said calmly, Okay, you re lucky, if it wasn t for me, it would be impossible for someone else to rescue you.
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Marshal, Marshal All the soldiers shouted in unison.The four brothers from back then are all senior generals in the army now, but their relationship is still very good.
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Although Lin Haoming was not a little surprised, the soul rings have the same effect, but they have the same effect.
Hachioji has been beating the drum for a long time.In the past two years, Wei Nao contracted a cold. If you say that this disease is not a serious illness, it will be fine after half a month.
After this time, I will use my calculations to let the eldest son succeed.In fact, a small part of the island is its employers.
Before the boat berthed, several big boats were put on board immediately, and a hundred or so people arrived at the shore in the big boats.The pitch black color carried a chilling air under the blood moon.
If he makes a move, when will I wake up Wei Nao asked.It s broken. Since you plan to make a move, let him talk about the situation.
Then he attacked the camp and ran off by himself. He got the map, so
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Will marry Ning Lin. As the representative of the Chu State, the Seventh Prince is quite capable, not to mention his identity is really suitable.General, who is that person, how can I come out from overseas I have always spoken in a low voice At this time, Qing also gathered enough to ask.
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Beat the drum. Wei Mei also gave the order at that time.In other words, you didn t participate because you watched you participate in the mission.
At this moment, looking at this little guy nearby, even the old people are not afraid, let alone so many newcomers, everyone is scared.At this moment, each of us was full of relief and fear, some of us even confessed to our past life now, and some of us could not bear it.
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The so called fixed location is not a place we can find that we can t temporarily camp.
Cependant, il est utile de savoir comment fonctionne un VPN pour mieux comprendre le service. Voici ce qui se passe en coulisses :
