What happened to the good old day rules that said NO USING PERSONAL DEVICES FOR SENSITIVE GOVERNMENT WORK?
There was this concept called the 'air gap', as well.
The basis of all of it was that as a person involved in sensitive government work you have absolutely no reason/business using technologies that are not provided to you to carry out the job. This reality is still possible today. You do not need a blackberry/iphone/etc to do your job and you can live without it until 5PM or whenever you get in your car to head home.
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More options = more liabilities.
ugh.