Ipsec Uses More Advanced Encryption Algorithms In That There Are Two

IPsec uses more advanced encryption algorithms in that there are two encryption methods; tunnel and transport. The tunnel method encrypts both the header and payload of each packet and the transport just encrypts the payload of each packet. For IPSec to work correctly the firewalls, routers and interfaces have to be able to read IPsec protocol otherwise it will not work. The encryption method of IPSec uses Public-key Encryption technology.
Wright (Wright, 2000) discusses 'IPsec is built around a number of standardised cryptographic technologies, and uses':
Secure Hash Algorithm (SHA), for authenticating packets. Digital certificates for validating public keys or Keyed hash algorithms, such as Hashbased Message Authentication Code (HMAC) with Message Digest version 5 (MD5).
Deliver secret keys between peers on a public network using Diffie-Hellman key exchanges
In order to guarantee the identities of the two parties Public key cryptography for signing Diffie-Hellman key exchanges are used.
The Data Encryption Standard (DES) and other algorithms for encrypting data.
Above Wright (Wright, 2000) provides some useful technical information which shows that IPsec is becoming a much more advanced encapsulation protocol than when it was first introduced back in 1995. The current version of IPsec is IPv6 and has overcome a lot of security problems otherwise thought as incurable problems.
Authentication Authorisation and Accounting (AAA) server is primarily used for more secure connections such as that required for remote dialup access. When a user dials up the AAA server it checks who the person is, then, what the persons rights and privileges are and the accounting is a log of what tasks place during the online session of the user.
There are other technologies used to provide security to VPN technologies such as SSL and QoS. Quality of Service (QoS) is a system where users are monitored to see if they have permission to use certain networks (i.e. other VPNs) if not, they are denied access. This bird's eye view can see if a network is under attack from cyber terrorism and can shut down sections if necessary and divert traffic. Secure Sockets Layer (SSL) VPN is specifically designed for remote access in that it provides all the encapsulation protocol for remote users such as wireless or dialup users out in the field. SSL VPN (Nortel SSLVPN, 2005) offers many advantages in that it is a secure method through use of advanced encryption technologies and, it is also supported across multiple applications and platforms. SSL VPN also has a built in AAA server facility which is key to any remote access required by the user on the move.
4.