Mobile code is great for adding powerful features and content,but has its drawbacks.
E-mail goes directly to a specific address,so with these methods,a hacker can target
a single organization or even a single person.The types of mobile code discussed in
this chapter all have had some thought put into making them secure,but the tech-
nology is so complex that security holes have been found in every one.Even greater
risks are introduced when two or more types of mobile code are allowed to interact
with each other.Individually,they might be fairly safe,but when working in cooper-
ation can cause loopholes in the security.VBScript and
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