Become a fan of Slashdot on Facebook

 



Forgot your password?
typodupeerror
×

Comment Posting doesn't match up with the speed of light (Score 1) 158

The entire circumference of the globe is about 24000 miles, which takes light 128ms (in a vacuum). The article's claim that the current time to send a packet from London to Tokyo is 230ms therefore seems doubtful. In this time, light can go 42840 miles in a vacuum -- or nearly twice around the the entire distance around the world (24091 miles). Light in a fiber is about 35% slower, but this still leaves time for 37177 miles.
Encryption

Submission + - FPGA Bistream Security Broken (iacr.org)

NumberField writes: Researchers in Germany released a pair of papers documenting severe power analysis vulnerabilities in the bitstream encryption of multiple Xilinx FPGAs. The problem exposes products using FPGAs to cloning, hardware Trojan insertion, and reverse engineering. Unfortunately, there is no easy downloadable fix, as hardware changes are required. These papers are also a reminder that differential power analysis (DPA) remains a potent threat to unprotected hardware devices. On the FPGA front, only Actel seems to be tackling the DPA issue so far, although their FPGAs are much smaller than Xilinx's.

Comment Wide aspect ratios are an even bigger problem (Score 1) 666

Glossy vs. matte is a minor issue compared to the ever-widening aspect ratios. Except for watching movies, the usefulness of a screen is determined by its vertical size. The 4:3 aspect ratio is by far the most useful. 16:10 is dramatically worse. 16:9 is an evil plot to prevent computer users from doing their jobs. Yet, the LCD industry is increasingly cranking out displays that are wider and shorter. The pinnacle of laptop displays was the Thinkpad T60's FlexView (aka IPS) 1600x1200 display. It's all been downhill since then. Interestingly, though, Apple seems to have figured this out. The 4:3 aspect ratio IPS display on the iPad is gorgeous -- and the right aspect ratio. The iPad display is a classic example of what makes Apple successful -- they push component manufacturers to produce what consumers desire, as opposed to assembling the cheapest components into an cheap, inelegant commodity product.
Security

Submission + - Keys leaking through the air at RSA 1

NumberField writes: The RSA Conference is underway in San Francisco. A theme among the opening speakers is that the attackers are winning, and even well-funded organizations like NASDAQ can't secure their networks reliably. The show floor is lively, but dominated by the typical firewalls and "compliance solutions". One interesting exception is a scary side channel analysis demo in the Cryptography Research booth using GNU Radio to capture secret keys from various smartphones from about 10 feet away. (The method is related to early computer music using AM radio interference.)
Businesses

Submission + - Apple to Keep 30% of Magazine Subscription Revenue 1

Hugh Pickens writes writes: The Guardian reports that Apple has launched a new subscription service for magazines, newspapers and music bought through its App Store, expanding the model developed for Rupert Murdoch's iPad newspaper and will keep 30% of the revenue from subscriptions if the subscription is purchased through Apple. "Our philosophy is simple – when Apple brings a new subscriber to the app, Apple earns a 30% share; when the publisher brings an existing or new subscriber to the app, the publisher keeps 100% and Apple earns nothing," says Steve Jobs, Apple's chief executive, who is presently taking a medical leave of absence from the company. "All we require is that, if a publisher is making a subscription offer outside of the app, the same – or better – offer be made inside the app, so that customers can easily subscribe with one click right in the app." Apple's control over its App Store payments plan has long been a cause for concern for content companies. Publishers want to have access to subscriber data which can provide lucrative demographics on which to base advertising campaigns and targeted reader offers. Apple says customers purchasing a subscription through its App Store will be given the option of providing the publisher with their names, email addresses and zip codes. The use of such information will be governed by the publisher's privacy policy rather than Apple's.

Comment Will high school grades determine kids' destinies? (Score 4, Interesting) 256

College want their admissions process to become a proxy for due diligence in hiring. ("Sally went to XYZ college, so she's more likely to be a valuable employee than Bob who went to a less selective school.") While this makes sense a little bit, it's also scary. For example, does this mean that what kids do in high school will increasingly set their destinies for life? Are XYZ graduates actually better employees, or is it just marketing?

Comment Assumes a CALL to the NULL ptr (not any reference) (Score 3, Interesting) 139

I was intrigued by the ./ posting, which claimed that the tutorial would show how to exploit any NULL pointer dereference. The actual article, however, requires a CALL to the NULL pointer. While some NULL pointer bugs are function pointers, many are not. Kernel code that merely reads or writes data to a NULL pointer will not be exploitable as shown.
Biotech

Adult Brains Grow From Specialist Use 260

Xemu writes "Researchers at University College of London's Institute of Neurology have discovered that taxi drivers grow more brain cells in the area associated with memory. Dr Eleanor Maguire says, 'We believe the brain increased in gray matter volume because of the huge amount of data memorized.' She warns against the use of GPS and says it will possibly affect the brain changes seen in this study. This research is the first to show that the brains of adults can grow in response to specialist use." London cabbies, unlike their American counterparts, have to learn the layout of streets and the locations of thousands of places of interest in order to get a license.
Displays

Submission + - High-performance flexible organic transistors

Roland Piquepaille writes: "Organic — or carbon-based — transistors are not new and can be used to design flexible computer displays, RFID tags and sensors. However, these organic single crystals could not be mass-produced because they needed to be individually handpicked. But now, researchers at Stanford University and the University of California-Los Angeles (UCLA) have developed a new method for building flexible organic transistor arrays. Even if the researchers have reached a density of 13 million crystals per square inch (or 2 million per square centimeter), there are still several issues to solve before this method can be used for commercial applications of these fast transistors. Read more for additional details and a photo of such a flexible organic transistor array obtained with this new method."

Slashdot Top Deals

If all else fails, immortality can always be assured by spectacular error. -- John Kenneth Galbraith

Working...