IPsec Virtual Private Network Fundamentals

Chapter 2. IPsec Fundamentals Internet Protocol Security (IPsec), as defined in RFC 2401, provides a means by which to ensure the authenticity, integrity, and confidentiality of data at the network layer of the Open System Interconnection (O...

Overview of Cryptographic Components As we had discussed briefly while introducing the criteria for defining an effective VPN, data confidentiality, data authentication, data integrity, and data nonrepudiation must be maintained. These criteria al...

Public Key Encryption Methods In almost every form of commercially available cryptographic scheme, which would include all of the components used in IPsec, the cipher used is generally known. It is the key that is used within the cipher that makes...

The IP Security Protocol (IPsec) IPsec provides us with a framework by which to secure data communications at the network layer of the OSI model, or, more specifically, to secure IP communications. In order to do so, the IPsec standard incorporate...

IKE and ISAKMP Internet Key Exchange and the Internet Security Association and Key Management Protocol were designed to allow crypto endpoints to dynamically exchange keys and negotiate security associations. Unlike the examples that we've discu...

Summary At this point, you should be familiar with all of the cryptographic components used to create an IPsec VPN. Additionally, you should also be aware of the fundamental mechanics that underpin the establishment of an IPsec VPN itself. The m...