Congress continued to inch closer to passing the nation's first comprehensive cybersecurity legislation on Thursday, approving a cloture vote that should set up a contentious debate next week. The Senate agreed to proceed to debate on the Lieberman-Collins-Rockefeller bill (S 3414) on Thursday by a vote of 84-11. The chamber elected to move the vote up one day, even though stakeholders haven't yet reached an agreement on a potential compromise that could ensure the bill's passage. Jon Kyl, R-Ariz., who has been helping to lead negotiations, said he supported the motion to proceed on the assumption that Majority Leader Harry Reid, D-Nev., would allow an open amendment process. Sponsors of a rival cybersecurity bill (S 3342) favored by some tech companies and many GOP senators said they plan to offer their bill as a substitute amendment.

While the latest version of the Lieberman-Collins-Rockefeller bill omits any mandatory security regulations for critical-infrastructure providers, stakeholders such as the U.S. Chamber of Commerce and IBM say the voluntary standards would quickly become mandatory in practice. IBM also wants more liability protections and freer communication between businesses and the Pentagon than would be allowed under the bill. But there is also significant support coming from the White House and Microsoft, among others. The White House signaled it would oppose any amendments to expand those liability protections or reduce the Department of Homeland Security's authority on cybersecurity. The latter is a key sticking point for Sen. John McCain, R-Ariz., who has led much of the opposition to the bill for the past five years and claims DHS is not up to the task. Centering more cybersecurity activities in the Department of Commerce has been floated as a late compromise this week; we'll be watching closely to see if that idea takes hold ahead of floor debate.

With the Senate out today, debate is set to resume on Monday evening. That gives lawmakers roughly seven days to get a deal done before they leave town for the August recess. We expect them to work out some sort of compromise, given the active state of negotiations at present. But again, the issue remains whether that package would be acceptable to the House, which has shown strong resistance to anything resembling federal regulation of cybersecurity. With such little time left, it's tough to see that situation changing in the next week. We will continue to bring you updates as the debate continues to evolve.

NSA Chief: Spike in Cyberattacks Against U.S. Infrastructure: Gen. Keith B. Alexander, who heads both the National Security Agency and U.S. Cyber Command, said Thursday that the U.S. has seen a 17-fold increase in the number of cyberattacks on its infrastructure between 2009 and 2011. Alexander's comments came at a speech at the Aspen Security Forum, where he said America is largely unprepared for a large-scale cyberattack. Alexander has previously sounded the alarm about the potential for a catastrophic attack on U.S. networks; at Aspen, he once again stumped for the comprehensive cybersecurity bill favored by Senate leadership and the White House.

Alexander also said the Obama administration is still working out the rules of engagement for the digital space, noting the extreme speed of such attacks makes some automatic defenses a necessity. He confirmed that under existing authorities, only the president has the authority to authorize a direct cyberattack. Notably, Alexander declined to say whether the Stuxnet virus, which targeted Iran's nuclear program, was created by the American government as reported. He did say he thought the increase in cyberattacks on the United States was unrelated to Stuxnet.

Senators Concerned About Surveillance Law: A bipartisan group of 11 Senators wrote (PDF) to the director of national intelligence on Thursday, expressing concern about the extension of a 2008 surveillance law that allows the warrantless surveillance of foreign nationals in contact with U.S. citizens. The Senate Judiciary Committee approved a two-and-half-year extension of the law (S 3276) earlier this month in a 10-8 party-line vote. Sen. Ron Wyden, D-Ore., who was among the signees, has been asking intelligence officials for months to provide the number of U.S. citizens affected by the law. The DNI's office has responded that it could not calculate such a number, but director James Clapper has acknowledged that the government has sometimes violated the spirit of the privacy restrictions in the original law. Clapper said the government has since fixed those issues, however. Apple Sales Booming in China: This week's print edition of The Economist reports sales of Apple products in China are robust, despite the lower-than-expected results for last quarter announced earlier this week. The newspaper notes Apple's products are a hit in China, which is already the company's second-biggest market. China could overtake the United States within a few years, provided the country's intellectual property laws and other potential landmines don't derail the momentum. The Chinese propensity for cheap mobile phones is another potential risk, given the high cost of the latest iPhone.