IPSec, the protocol suite to secure any traffic that moves on a Protocol (IP) Internet network, promises big things for online business:. IPSec New Security Standard for Internet, Intranet, and Virtual Private Networks catalog specifications that make up this suite and explain how they fit into intranets, virtual private network (VPN), and the Internet. Author Doraswamy and Harkins first treat IPSec as a system, explaining how the component parts work together to provide a flexible security. Their approach to this task makes sense: They first explain why standard IP packets are not safe, then they show how the IPSec improvements make secure transactions possible. Sections on implementing IPSec protocols on networks remain fairly abstract and do not mention the actual product, but should prove useful to programmers designing products to their own security network around the IPSec specification.