An article in the Arizona Daily Sun
[azdailysun.com] points out the need for taking steps to protect information that you consider proprietary.  To gain legal protection for information you consider private,  one of the things necessary is to demonstrate that significant steps have been taken to maintain the secrecy of that information.
Performing regular TSCM sweeps will help establish that the information that may be exchanged in phone conversations, meetings, or conferences  can be considered as proprietary and protected under trade secret laws, and that the interception of that information can be prosecuted fully.
–cp 
 
AZDailySun.com May 05, 2013  •  HOWARD FISCHER Capitol Media Services 

PHOENIX — Companies that want to sue former workers who have stolen what they say are trade secrets need to prove that what was taken is truly a secret, the Arizona Court of Appeals has ruled.
And they have to prove they made a real effort to keep the information secret.

Judge Patricia Norris, writing for the court, said customer lists can be considered trade secrets. But the judge said that, by itself, is not enough. …

Norris said the case turns on common law principles of what is a “trade secret.” That, she said, requires two things.
First, it has to have independent economic value by virtue of not being generally know and not being “readily ascertainable by proper means” by others. Second, it must be “the subject of efforts … to maintain its secrecy.”

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