How companies can protect data and other information.(Spotlight: Information Security)

Byline: Louise Esola

When it comes to securing corporate laptops, BlackBerries and personal digital assistants, the weakest link can be the person using the electronic device, and the best line of defense against theft and hacking is strong company policy, experts say.

"One of the most important things is policy,'' said Sean McDermott, a New York-based manager of computer forensics with Aon Consulting. "The easiest and least expensive way to secure these devices is to have a written policy. If people know there can be a problem with security, they will try to avoid the problem.''

Companies can control risks by regulating where and when an employee …