VPN Security

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What Does VPN Security Mean?

VPN security encompasses the collective measures that ensure data and transmission security within a VPN connection.


It includes security methodologies and tools that ensure communication confidentiality, user authentication and message integrity in a VPN service.

Techopedia Explains VPN Security

VPN security is typically delivered through networking and/or tunneling protocols. Such protocols ensure data security and integrity by encrypting data when it is transmitted over the VPN tunnel or path. Once the packet successfully reaches the destination node, it is decrypted back to its original state. Similarly, at the user level, VPN security works by authenticating each user before they can access VPN services.

Some of the protocols that provide VPN security include:

  • Internet protocol security (IPSec)
  • Secure Sockets Layer/Transport layer security (SSL/TLS)
  • Datagram transport layer security (DTLS)
  • Secure Shell (SSH)
  • Secure Socket Tunneling Protocol (SSTP)

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Margaret Rouse
Technology Expert
Margaret Rouse
Technology Expert

Margaret is an award-winning technical writer and teacher known for her ability to explain complex technical subjects to a non-technical business audience. Over the past twenty years, her IT definitions have been published by Que in an encyclopedia of technology terms and cited in articles by the New York Times, Time Magazine, USA Today, ZDNet, PC Magazine, and Discovery Magazine. She joined Techopedia in 2011. Margaret's idea of a fun day is helping IT and business professionals learn to speak each other’s highly specialized languages.