The Computer & Communications Industry Association said Thursday that it could not support a bill before Congress allowing businesses to share information about cyber threats with the government.

The Cybersecurity Information Sharing Act is a proposed law that has alarmed many privacy advocates. However, the bill has received a generally warm response from business groups such as the U.S. Chamber of Commence and Financial Services Roundtable.

CCIA, on the other hand, has some concerns. In a blog post on the association's website, Policy Counsel Bijan Madhani said the bill as currently written "does not sufficiently protect users' privacy or limit the permissible uses of information shared with the government." He also argued the bill allows entities to deploy defense measures that could harm the systems of innocent third parties.

"CCIA recognizes the goal of seeking to develop a more robust system through which the government and private sector can readily share data about emerging threats," he said. "But such a system should not come at the expense of users' privacy, need not be used for purposes unrelated to cybersecurity, and must not enable activities that might actively destabilize the infrastructure the bill aims to protect."

CCIA's membership includes some of the world's largest technology companies—such as Amazon, Facebook, Google and Microsoft—so its lack of support for the bill is an indicator of how the technology industry as a whole feels.

The bill is currently in the U.S. Senate.

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