What does a well-designed VPN use to keep data and connection secure?


Confidentiality of data

What’s probably the most important benefit that one gets from the VPN is data confidentiality. By encrypting data, information sent from one computer to another is encoded into a form that only a computer can decode.

The most-used encryption protocols nowadays are:

  • Internet Protocol Security Protocol (IPsec)
  • Layer 2 Tunneling Protocol (L2TP)/IPsec
  • PPTP/Microsoft Point-to-Point Encryption (MPPE)

Integrity of data

Most encryption protocols have a way of ensuring that the encrypted data are not changed while in transit. If tampering of data is detected, the encryption protocol will drop the packet.

searchAuthentication of data origin

The identity of a data source needs to be verified to prevent Internet attacks.


VPNs may detect and refuse replayed packets. It likewise helps avoid spoofing.

Data tunneling

By definition, tunneling is a process of encapsulating a packet with another packet and sending it over a network. It is a helpful process in cases where the identity of a device originating the traffic needs to be hidden.

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