Internet - Virtual private networks

  Internet

  • Remote users are connected to any Internet Service Provider (ISP) to their corporate LAN using secure tunnels.
  • A VPN is a network tunnel created for encrypted data transmission between two or more authenticated parties. It ensures data privacy, integrity and authenticity.

 nwvpn0.gif (5742 bytes)

Features

  • The key components of a complete VPN are confidentiality, strong authentication, routing and tunneling, automated key management, performance and standards implementation. Suggested keys longer than 90 bits (Voyager NZ in 1998 offered 40 bit encryption).
  • Tunneling - encapsulating an encrypted packet inside a new packet with a new header.
  • X.509 digital certificates are becoming the defacto standard for authentication as they provide significantly stronger authentication than traditional password based schemes.
  • b_ref.gif (1385 bytes) Lombard,S. (1998, Apr)

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