The Senate will not take up the controversial Cyber Intelligence Sharing and Protection Act (CISPA), a Senate Commerce Committee spokesman confirmed today.

Committee Chairman Jay Rockefeller would like to pass cyber-security legislation, but thinks that CISPA is flawed, the spokesman said.

At this point, Senate Commerce is deciding which cyber-related issues will be taken up by the Commerce, Intelligence, and Homeland Security committees. But the Senate will be addressing those issues in separate bills, so CISPA as we know it will likely meet the same fate as it did last year.

A spokeswoman for Rep. Mike Rogers, who authored CISPA, did not immediately respond to a request for comment.

As noted by U.S. News & World Report, which first reported the story, Sen. Rockefeller thinks CISPA's "privacy protections are insufficient."

Prior to the House passage of CISPA, meanwhile, the White House also expressed concern with CISPA and threatened to veto it if it did not tighten up provisions related to handling of data and personal data, among other things.

CISPA would allow for voluntary information sharing between private companies and the government in the event of a cyber attack. If the government detects a cyber attack that might take down Facebook or Google, for example, they could notify those companies. At the same time, Facebook or Google could inform the feds if they notice unusual activity on their networks that might suggest a cyber attack.

Backers argue that it's necessary to protect the U.S. against cyber attacks from countries like China and Iran, but opponents said that it would allow companies to easily hand over users' private information to the government.

A version of CISPA passed the House a year ago, but it failed to make it through the Senate. As a result, Reps. Mike Rogers and co-sponsor Dutch Ruppersberger - chairman and ranking member of the House Intelligence Committee - announced a few amendments recently that they hoped would appease detractors enough to get the bill signed into law.

It was enough to pass the House with a vote of 288 to 127, but getting it through the Democratic-controlled Senate has proven to be quite the task.

For more, check out What is CISPA, and Why Should You Care?