Protecting content

Message classifications are useful to a point. They don’t impose any restrictions on users and apart from providing some advice as to how important information contained in a message is, users can blissfully ignore their invocation to deal with the information in any particular way. Another approach is necessary if you want to impose restrictions on users as to what they can and cannot do with content. This isn’t a new requirement. For almost 20 years, companies have attempted to protect sensitive information that users transmit in email. The first attempts were based on message encryption and required the sender and recipient to share common (public) keys. The first versions of Exchange-based message encryption used the Windows ...

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