As companies look for better ways to secure online documents and E-mail, whether to protect sensitive information or to comply with government regulations, they're increasingly turning to a growing class of security software known as enterprise digital-rights management.

DRM software lets companies enforce security policies for documents, such as who can read, edit, print, and forward sensitive information. Encryption technologies typically are used. "You need to have your security policies travel with your information, and DRM lets you do just that," says Pete Lindstrom, research director at security research firm Spire Security.

By George Hulme at InternetWeek.

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