New cache design speeds up processing time by 15%

Texas A&M Supercomputing Transistors keep getting smaller and smaller, enabling computer chip designers to develop faster computer chips. But no matter how fast the chip gets, moving data from one part of the machine to another still takes time. To date, chip designers have addressed this problem by placing small caches of local memory on or near the processor itself. Caches store the most frequently used data for easy access. But the days of a cache serving a single processor (or core) are over, making management of cache a nontrivial challenge. Additionally, cores typically have to share data, so the physical layout of the communication network connecting the cores needs to be considered, too. Researchers at MIT and the University of Connecticut have now developed a set of new “rules” for cache management on multicore chips. Simulation results have shown that the rules significantly improve chip performance while simultaneously reducing the energy consumption. The researcher’s first paper, presented at the IEEE International Symposium on Computer Architecture, reported gains (on average) of 15 percent in execution time and 25 percent energy savings. Read 8 remaining paragraphs | Comments

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New cache design speeds up processing time by 15%

Sextortionist who hacked Miss Teen USA’s computer sentenced to 18 months

Andrew Cunningham The California computer science student who hacked various women’s computers for the purposes of “sextortion”—including Miss Teen USA 2013, Cassidy Wolf —has been sentenced to 18 months in prison. The sentence comes after Jared James Abrahams pleaded guilty to one count of computer hacking and three counts of extortion last November. According to a press release published Monday afternoon by the United States Attorney’s Office for the Central District of California, Abrahams “used the nude photos to extort victims by threatening to publicly post the compromising photos or videos to the victims’ social media accounts—unless the victim either sent more nude photos or videos, or engaged in a Skype session with him and did what he said for five minutes.” As Ars Deputy Editor Nate Anderson wrote last year , Abrahams became decently adept at using remote administration tools (RATs), a malware used to spy on victims. Read 3 remaining paragraphs | Comments

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Sextortionist who hacked Miss Teen USA’s computer sentenced to 18 months

Detection of primordial gravitational waves announced

The BICEP (Background Imaging of Cosmic Extragalactic Polarization) telescope at the South Pole, designed to measure polarized light from the early Universe. Steffen Richter When the Harvard-Smithsonian Center for Astrophysics announced a press conference for a “Major Discovery” (capital letters in the original e-mail) involving an unspecified experiment, rumors began to fly immediately.  By Friday afternoon, the rumors had coalesced around one particular observatory: the  BICEP  microwave telescope located at the South Pole.  Over the weekend, the chatter focused on a specific issue: polarization in the Cosmic Microwave Background left over from the Big Bang. With the start of the press conference, it’s now clear that we’ve detected the first direct evidence of the inflationary phase of the Big Bang, in which the Universe expanded rapidly in size. BICEP, the Background Imaging of Cosmic Extragalactic Polarization experiment, was built specifically to measure the polarization of light left over from the early Universe. This light, known as the cosmic microwave background (CMB), encodes a lot of information about the physical state of the cosmos from its earliest moments. Most observatories (such as Planck and WMAP) have mapped temperature fluctuations in the CMB, which are essential for determining the contents of the Universe. Polarization is the orientation of the electric field of light, which conveys additional information not available from the temperature fluctuations. While much of CMB polarization is due to later density fluctuations that gave rise to galaxies, theory predicts that some of it came from primordial gravitational waves. Those waves are ripples in space-time left over from quantum fluctuations in the Universe’s earliest moments. Read 2 remaining paragraphs | Comments

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Comcast and Time Warner Cable lost 1.1 million video customers in 2013

Mr.TinDC Comcast, Time Warner Cable (TWC), and all other top cable companies lost pay-TV subscribers in 2013, but the companies were able to boost their total broadband Internet subscribers, according to research by Leichtman Research Group. Comcast and TWC, the two biggest cable companies in the US, combined for 1.1 million lost video subscribers. Comcast finished 2013 with 21.7 million multi-channel video subscribers, down 305,000 according to  Leichtman’s research . TWC lost 825,000 video subscribers, dropping to 11.4 million.”The top nine cable companies lost about 1,735,000 video subscribers in 2013—compared to a loss of about 1,410,000 subscribers in 2012,” the research said. At the same time, Comcast added 1.3 million broadband Internet subscribers to hit a total of 20.7 million . TWC gained 211,000 broadband subscribers to bring its total to 11.6 million. Comcast’s 1.3 million broadband subscriber gain accounted for “49 percent of the total net additions for the top providers in the year,” the research said. Read 13 remaining paragraphs | Comments

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Comcast and Time Warner Cable lost 1.1 million video customers in 2013

In sudden announcement, US to give up control of DNS root zone

Photograph by David Davies In a historic decision on Friday, the United States has decided to give up control of the authoritative root zone file, which contains all names and addresses of all top-level domain names. The National Telecommunications and Information Administration (NTIA), under the United States Department of Commerce, has retained ultimate control of the domain name system (DNS) since transitioning it from a government project into private hands in 1997. With Commerce’s blessing, the International Corporation for Assigned Names and Numbers (ICANN) acts as the primary essential governing body for Internet policy. The new change is  in advance of the upcoming ICANN meeting to be held in Brazil in April 2014. Brazil has fumed at revelations of American spying on its political leaders and corporations, which were first revealed in September 2013 as the result of documents distributed by whistleblower Edward Snowden. The South American country also threatened to build its “own cloud,” as a consequence of the NSA’s spying. Read 14 remaining paragraphs | Comments

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In sudden announcement, US to give up control of DNS root zone

NSA’s automated hacking engine offers hands-free pwning of the world

Since 2010, the National Security Agency has kept a push-button hacking system called Turbine that allows the agency to scale up the number of networks it has access to from hundreds to potentially millions. The news comes from new Edward Snowden documents published by Ryan Gallagher and Glenn Greenwald in The Intercept today. The leaked information details how the NSA has used Turbine to ramp up its hacking capacity to “industrial scale,” plant malware that breaks the security on virtual private networks (VPNs) and digital voice communications, and collect data and subvert targeted networks on a once-unimaginable scale. Turbine is part of Turbulence, the collection of systems that also includes the Turmoil network surveillance system that feeds the NSA’s XKeyscore surveillance database. While it is controlled from NSA and GCHQ headquarters, it is a distributed set of attack systems equipped with packaged “exploits” that take advantage of the ability the NSA and GCHQ have to insert themselves as a “man in the middle” at Internet chokepoints. Using that position of power, Turbine can automate functions of Turbulence systems to corrupt data in transit between two Internet addresses, adding malware to webpages being viewed or otherwise attacking the communications stream. Since Turbine went online in 2010, it has allowed the NSA to scale up from managing hundreds of hacking operations each day to handling millions of them. It does so by taking people out of the loop of managing attacks, instead using software to identify, target, and attack Internet-connected devices by installing malware referred to as “implants.” According to the documents, NSA analysts can simply specify the type of information required and let the system figure out how to get to it without having to know the details of the application being attacked. Read 13 remaining paragraphs | Comments

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How CIA snooped on Senate Intel Committee’s files

CIA Headquarters in Langley, Virginia. The CIA gave Senate Intelligence Committee staffers access to its data offsite—in a leased facility the CIA controlled. It sounds like something out of Homeland : at a secret location somewhere off the campus of the Central Intelligence Agency, the CIA leases a space and hires contractors to run a top-secret network, which it fills with millions of pages of documents dumped from the agency’s internal network. But that’s apparently exactly what the CIA did for more than three years as part of an agreement to share data with the staff of the Senate Select Committee on Intelligence on its controversial detention and interrogation program. And it’s also how the agency was able to gain access to the computers and shared network drive used by committee staffers in a search that Senator Diane Feinstein contended today  crossed multiple legal and constitutional boundaries. In a speech on the Senate floor this morning, Feinstein detailed the strange arrangement and accused the CIA of breaking its agreement with the committee on multiple occasions. She also accused the agency of reportedly filing a criminal report against committee staffers with the Justice Department in “a potential effort to intimidate this staff.” The details shared by Feinstein show the length to which the CIA went to try to control the scope of the data that was shared with Senate staffers—and still managed to give them more than some officials in the agency wanted to. Even with multiple levels of oversight, the CIA managed to hand over the data along with an internal review of that very data, which included the agency’s own damning assessment of the interrogation program. Read 18 remaining paragraphs | Comments

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Refinements, additions, and un-breaking stuff: iOS 7.1 reviewed

Time to update! iOS 7.1 is here, and it fixes a lot of iOS 7.0’s biggest problems. Aurich Lawson There were about six months between the ouster of Scott Forstall from Apple in late October of 2012 and the unveiling of iOS 7.0 in June of 2013. Jony Ive and his team redesigned the software from the ground up in that interval, a short amount of time given that pretty much everything in the operating system was overhauled and that it was being done under new management. The design was tweaked between that first beta in June and the final release in mid-September, but the biggest elements were locked in place in short order. iOS 7.1’s version number implies a much smaller update, but it has spent a considerable amount of time in development. Apple has issued five betas to developers since November of 2013, and almost every one of them has tweaked the user interface in small but significant ways. It feels like Apple has been taking its time with this one, weighing different options and attempting to address the harshest criticism of the new design without the deadline pressure that comes with a major release. We’ve spent a few months with iOS 7.1 as it has progressed, and as usual we’re here to pick through the minutiae so you don’t have to. iOS 7.1 isn’t a drastic change, but it brings enough new design elements, performance improvements, and additional stability to the platform that it might just win over the remaining iOS 6 holdouts. Read 42 remaining paragraphs | Comments

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Refinements, additions, and un-breaking stuff: iOS 7.1 reviewed

Intel’s 800Gbps cables headed to cloud data centers and supercomputers

Intel’s pitch for Silicon Photonics. Intel and several of its partners said they will make 800Gbps cables available in the second half of this year, bringing big speed increases to supercomputers and data centers. The new cables are based on Intel’s Silicon Photonics technology that pushes 25Gbps across each fiber. Last year, Intel demonstrated speeds of 100Gbps in each direction, using eight fibers. A new connector that goes by the name “MXC” holds up to 64 fibers (32 for transmitting and 32 for receiving), enabling a jump to 800Gbps in one direction and 800Gbps in the other, or an aggregate of “1.6Tbps” as Intel prefers to call it. (In case you’re wondering, MXC is not an acronym for anything.) That’s a huge increase over the 10Gbps cables commonly used to connect switches and other equipment in data centers today. The fiber technology also maintains its maximum speed over much greater distances than copper, sending 800Gbps at lengths up to 300 meters, Intel photonics technology lab director Mario Paniccia told Ars. Eventually, the industry could boost the per-line rate from 25Gbps to 50Gbps, doubling the overall throughput without adding fibers, he said. Read 13 remaining paragraphs | Comments

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iOS 7.1 released, improves iPhone 5S stability, iPhone 4 speed, and more

After months of testing, iOS 7.1 is finally here. Andrew Cunningham Apple has just released iOS 7.1, the first major update to iOS 7 . The new update provides a variety of security and stability fixes, some speed improvements, and UI tweaks that refine the new design introduced back in December. The update is available for all devices that can run iOS 7: the iPhone 4, 4S, 5, 5C, and 5S; the iPad 2, both Retina iPads, both iPad minis, and the iPad Air; and the fifth-generation iPod touch. The update brings a whole pile of fixes. It addresses a crashing bug with the iPhone 5S, improves speed on the iPhone 4, introduces the new CarPlay feature, adds new accessibility options, and makes a handful of other refinements to the UI. The first iOS 7.1 beta was released to developers back in mid-November, and four additional betas have been issued since then. Throughout the beta cycle, Apple has continuously adjusted the operating system’s user interface, polishing it and making it more consistent. We’ve been playing with the iOS 7.1 betas for a few months now, and we’ll be publishing a full review of the software after we’ve spent a little more time with the final release. We’ll also be revisiting our original article about performance on the iPhone 4 later today. Read on Ars Technica | Comments

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iOS 7.1 released, improves iPhone 5S stability, iPhone 4 speed, and more