Data Encryption via VPN: A Comprehensive Guide to the Basics

Data Encryption via VPN: A Comprehensive Guide to the Basics

The term data encryption actually refers to the specific technology which facilitates the proper encoding any data which can only be decoded by specific device which occupies the necessary decoder. Encryption helps us to secure our confidential information while mailing that to any specific person over the network.
Currently with the advancement of the internet technology, the possibility of unwanted data theft is also increased while using a public network. This can only be prevented by proper encryption which can be used while using a VPN service. Confidential information only gets decrypted at both the ends of the tunnel in VPN. As these information enters into the tunnel in an encrypted form that’s why the possibility of data theft gets decreased.
The Internet protocol security (IPsec) or generic routing encapsulation (GRE) is mainly used by the site to site VPN. GRE mainly establishes the specified framework which is responsible for the packing of the passenger protocol to transmit the same over the internet protocol in an encrypted manner.
In the recent days, the use of the IPsec gets significantly increased due to its several features. Confidential information can easily be encrypted by this technology between wide ranges of devices which includes desktop to router, router to router, firewall to router and desktop to server etc. The IPsec mainly includes two sub protocols i.e. Encapsulated Security Payload (ESP) & Authentication Header (AH). The transport mode as well as the tunnel mode is the two main modes which are used by the IPsec for proper encryption of the data. Transport mode encrypts data which are getting travelled between the two devices whereas tunnelling mode builds a tunnel between two devices for proper encryption of data. Mainly relying on the PPP protocol, the remote access VPN mainly uses any of the three following protocols i.e. Layer 2 forwarding, Point to Point Tunnelling Protocol & Layer 2 Tunnelling Protocol etc.

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