Is online privacy a lost cause?

Nine in 10 Americans believe they have no control over their personal information, how it is collected and how it is used by companies, according to a new Pew Research Center survey.

And they're more concerned about corporate America than the government.

Of those who use social networking sites -- like Facebook (FB, Tech30), Instagram,Twitter (TWTR, Tech30), LinkedIn (LNKD, Tech30) and Tumblr -- 80% said they're concerned about businesses and advertisers accessing their information. Fewer -- 70% -- said they're concerned about the feds doing the same.

The survey is part of a series testing public perception in the wake of the NSA leakerEdward Snowden's revelations about government surveillance.

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The survey appears to show frustration. While 61% of respondents told Pew they "would like to do more" to be anonymous online, only 24% said it is "easy" to do so.

Also, 88% of respondents said it is difficult to delete inaccurate information about themselves once it gets on the Internet.

Most respondents said old-fashioned communication -- a landline phone -- is the most secure way to contact people. About half of Americans think that about their cell phones, and only 15% say the same for social media.