3 Introduction This project describes VPNs, or Virtual Private Networks. I’ll try to briefly describe the main components, technologies and advantages. The audience is expected to have some basic knowledge the TCP/IP protocols, as well as general security concepts.
4 VPN concept definition VPN- Virtual Private Network. The VPN concept is all about combining several separated Private Networks using public infrastructure. Virtual- because it’s dynamic connection over public infrastructure. Private- data security is preserved. Network- connects several LANs or single computers to a mainframe/LAN
11 VPN example- IPSec Whats IPSec? IPSecs goal is to secure IP packets (IPv6/v4). What is it good for? IPSec provides authentication, integrity, access control, and confidentiality.
12 IPSec Overview Fundamental components of IPSec : Algorithms for encryption Key management ISAKMP, IKE, SKEME Security protocols Authentication header (AH) and encapsulation security payload (ESP)
13 Algorithms for encryption Symmetric Algorithms: DES, 3DES, and AES. Asymmetric Algorithms-public key algorithms: IKE (Internet Key Exchange ) In 1999, the DES key was cracked in less than 24 hours by using an exhaustive key search. IPSec