Data-wiping algorithm cleans your cellphone

Paul Marks, chief technology correspondent

Mailing your cellphone to a recycling company might make you a few pounds, but it can leave you at risk of identity theft. The deletion techniques recycling companies use are meant for hard discs, and so don't work on the solid-state flash memory used in mobile phones. That means personal data like banking info, texts, contacts and pictures can end up in the hands of, well, anyone the phone ends up with.  

To remedy the problem, British company BlackBelt Smartphone Defence of Skelmersdale, Lancashire claims to have developed a software algorithm that can securely delete data on cellphone memory chips. The trouble with data in a flash memory chip is that it is protected by an on-chip protection algorithm called the wear leveller. This hard-coded routine does its best to ensure the chip's lifetime is maximised so that each memory cell's ability to store charge is not worn out.

"The problem is that the wear-levelling algorithm ends up working
against the data wiping technique used for hard drives, which tries to
overwrite all the data,"
says the company's Ken Garner.

What the firm has done is write their own algorithm, called BlackBelt DataWipe, that works with,
rather than against, the leveller routine to render data
irrecoverable. "It is like having a shredder for personally identifiable
data," says Garner.

However, they don't yet know if their method is proof against sophisticated, nation-state level attacks - which might use electron microscopes
to read the last vestiges of the zeros and ones on a memory chip. "I imagine
if you're GCHQ you'll probably have technology that could get around
this and recover it in some way," says Garner.

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Tennis: Nadal advances to semi-finals in comeback event

VINA DEL MAR, Chile: Rafael Nadal, playing his first event after a seven-month injury layoff, advanced to the semi-finals of the $410,200 Vina del Mar ATP claycourt tournament with a straight-sets triumph on Friday.

The 11-time Grand Slam champion from Spain ousted seventh-seeded countryman Daniel Gimeno-Traver 6-1, 6-4.

Top seed Nadal will face either French third seed Jeremy Chardy or Italian sixth seed Paolo Lorenzi for a spot in the final.

Until this week, Nadal had not played since a shock second-round exit from Wimbledon in June.

A torn tendon and inflammation in his left knee kept the former world number one out of the London Olympics and the 2012 US Open and a virus delayed his return.

Nadal broke Gimeno-Traver's first service game of the match for a 2-0 lead and again in the sixth game before holding to claim the first set after 33 minutes.

In the second set, Nadal broke in the ninth game and then fought off four break points, the only ones he faced in the match, before holding serve in the final game to advance after 84 minutes.

For the match, Nadal connected on 68 percent of his first serves, winning 29-of-44 points on his first serve and 14-of-20 on his second serve.

Nadal, who turns 27 in June, plans to compete in claycourt events at Brazil and Mexico before playing ATP Masters hardcourt events at Indian Wells and Miami and then heading to Europe for clay events in Monte Carlo, Barcelona and Rome ahead of the French Open, where Nadal has claimed the crown a record seven times.

- AFP/de

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Dell's top shareholders don't want it to go private

Dell's largest outside shareholder opposes the computer maker's plan to go private, saying that the deal "grossly undervalues the company," according to a letter sent to the Dell board.

The shareholder, Southeastern Asset Management, submitted the letter as part of Securities and Exchange Commission documents filed today. The group owns 8.5 percent of Dell's shares, making it the largest outside shareholder.

Dell announced the $24.4 billion deal, which needs regulatory and shareholder approval, this week. CEO Michael Dell and investment firm Silver Lake are paying $13.65 per share, while Microsoft is contributing a $2 billion loan, to buy back the company's shares. The idea is the transaction would let the struggling company try to turn itself around without the pressure from shareholders.

Southeastern Asset Management said the $13.65 price per share is too low and argued for other options it said would give shareholders more value.

Apparently, it's not the only one. Three of the top 20 shareholders support Southeastern's opposition to the deal, according to a report from Reuters. An unnamed source told Reuters that Harris Associates, Yacktman Asset Management, and Pzena Investment Management, are the shareholders backing Southeastern. The three firms in total own 3.3 percent of shares.

Pzena's chairman, Richard Pzena, told Reuters that the shares should price in the $20 range or Dell should try other options.

Southeastern Asset Management's letter said it's willing to start a proxy fight -- in which it would persuade shareholders to vote out the company management so the company is easier to take over -- or file a lawsuit to stop Dell's action.

We are writing to express our extreme disappointment regarding the proposed go-private transaction, which we believe grossly undervalues the Company. We also write to inform you that we will not vote in favor of the proposed transaction as currently structured. We retain and intend to avail ourselves of all options at our disposal to oppose the proposed transaction, including but not limited to a proxy fight, litigation claims and any available Delaware statutory appraisal rights.

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From Our Vault: Busy Postman on Break, 1951

The United States Post Office announced this week that it intends to stop Saturday letter delivery beginning in August, 32 years after Congress mandated a sixth day of mail service.

First class mail volume has been dropping by about five billion pieces annually since 2007. And the USPS operated almost $16 billion dollars in the red in 2012.

In the 1950s, when this photo was taken, the federal agency was more flush with money. Five hundred thousand employees carried 54 billion items when National Geographic magazine published the article "Everyone's Servant, the Post Office" in July of 1954. Mail volume had doubled since the previous decade, and was growing at a rate of about seven percent a year.

This photo from 1951 didn't make it into that article, landing instead in the National Geographic image archive. Working during the postal boom years, this mailman delivering to houses in Hays, Kansas, likely didn't have time to notice the slight.

National Geographic photographer John E. Fletcher explained the mailman's decision to lunch in a mailbox in a note on the back of the photo.

"He told me that a new regulation from the Washington headquarters of the U.S. Post Office required that postmen while on delivery at noontime must stop and have their lunch at the spot, rather than taking time off to go home and eat," Fletcher wrote.

"This mailman told me that each day his wife would drive to this particular corner and meet him and hand him his lunch box," he continued. "The most convenient spot that he could find to eat his lunch was to open a storage mail box, get himself comfortably seated, and eat his lunch right on the street corner."

Editor's note: This is the first in a series of pieces that looks at the news through the lens of the National Geographic photo archives.

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'Stay Home': Northeast Shuts Down as Blizzard Hits

A blizzard of possibly historic proportions is set to strike the Northeast, starting today and could bring more than two feet of snow and strong winds that could shut down densely populated cities such as Boston and New York City.

A storm from the west will join forces with one from the south to form a nor'easter that will sit and spin just off the East Coast, affecting more than 43 million Americans. Wind gusts will reach 50 to 60 mph from Philadelphia to Boston.

"[It] could definitely be a historic winter storm for the Northeast," Adrienne Leptich of the National Weather Service in Upton, N.Y., said. "We're looking at very strong wind and heavy snow and we're also looking for some coastal flooding."

The snow began falling in New York City shortly before 7 a.m. ET. The snow is expected to mix with some sleet and then turn back into snow after 3 p.m.

Airlines have started shutting down operations between 2 p.m. and 5 p.m. at major airports in the New York area as well as in Boston, Portland, Maine, Providence, and other Northeastern airports. More than 4,000 flights have been cancelled on Friday and Saturday, according to FlightAware. Airlines hope to resume flights by Saturday afternoon.

New York City is expecting up to 14 inches, which is expected to start this morning with the heaviest amounts falling at night and into Saturday. Wind gusts of 55 mph are expected in New York City and Cape Cod, Mass., could possibly see 75 mph gusts.

PHOTOS: Northeast Braces for Snowstorm

Weather Forecast: Northeast Braces for Monster Blizzard Watch Video

Winter Storm to Hit Northeast With Winds and Snow Watch Video

Boston, Providence, R.I., Hartford, Conn., and other New England cities canceled school today. Boston and other parts of New England could see more than 2 feet of snow by Saturday.

Massachusetts Governor Deval Patrick declared a state of emergency Friday afternoon and announced a ban on all traffic from roads after 4 p.m. It is believed that the last time the state enacted such a ban was during the blizzard of 1978.

Beach erosion and coastal flooding is possible from New Jersey to Long Island, N.Y., and into New England coastal areas. Some waves off the coast could reach more than 20 feet.

"Stay off the streets of our city. Basically, stay home," Boston Mayor Tom Menino warned Thursday.

Blizzard warnings were posted for parts of New Jersey and New York's Long Island, as well as portions of Massachusetts, Rhode Island and Connecticut, including Hartford, New Haven, Conn., and Providence. The warnings extended into New Hampshire and Maine.

To the south, Philadelphia was looking at a possible 4 to 6 inches of snow.

Thousands of flights have already been canceled in anticipation of the storm. Amtrak said its Northeast trains will stop running this afternoon.

Bruce Sullivan of the National Weather Service says travel conditions will deteriorate fairly rapidly Friday night.

"The real concern here is there's going to be a lot of strong winds with this system and it's going to cause considerable blowing and drifting of snow," he said.

Parts of New York, still reeling from October's Superstorm Sandy, are still using tents and are worried how they will deal with the nor'easter.

"Hopefully, we can supply them with enough hot food to get them through before the storm starts," Staten Island hub coordinator Donna Graziano said.

New York City Mayor Michael Bloomberg said plows and 250,000 tons of salt were being put on standby.

"We hope forecasts are exaggerating the amount of snow, but you never can tell," Bloomberg said Thursday.

Residents of the Northeast have already begun to hit stores for groceries and tools to fight the mounting snow totals.

The fire department was called in to a grocery store in Salem, Mass., because there were too many people in the store Thursday afternoon trying to load up their carts with essential items.

"I'm going to try this roof melt stuff for the first time," Ian Watson of Belmont, Mass., said. "Just to prevent the ice dam. ... It's going be ugly on that roof."

ABC News' Max Golembo and The Associated Press contributed to this report.

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Robot inquisition keeps witnesses on the right track

MEMORY is a strange thing. Just using the verb "smash" in a question about a car crash instead of "bump" or "hit" causes witnesses to remember higher speeds and more serious damage. Known as the misinformation effect, it is a serious problem for police trying to gather accurate accounts of a potential crime. There's a way around it, however: get a robot to ask the questions.

Cindy Bethel at Mississippi State University in Starkville and her team showed 100 "witnesses" a slide show in which a man steals money and a calculator from a drawer, under the pretext of fixing a chair. The witnesses were then split into four groups and asked about what they had seen, either by a person or by a small NAO robot, controlled in a Wizard of Oz set-up by an unseen human.

Two groups - one with a human and one a robot interviewer - were asked identical questions that introduced false information about the crime, mentioning objects that were not in the scene, then asking about them later. When posed by humans, the questions caused the witnesses' recall accuracy to drop by 40 per cent - compared with those that did not receive misinformation - as they remembered objects that were never there. But misinformation presented by the NAO robot didn't have an effect.

"It was a very big surprise," says Bethel. "They just were not affected by what the robot was saying. The scripts were identical. We even told the human interviewers to be as robotic as possible." The results will be presented at the Human-Robot Interaction conference in Tokyo next month.

Bilge Mutlu, director of the Human-Computer Interaction Laboratory at the University of Wisconsin-Madison, suggests that robots may avoid triggering the misinformation effect simply because we are not familiar with them and so do not pick up on behavioural cues, which we do with people. "We have good, strong mental models of humans, but we don't have good models of robots," he says.

The misinformation effect doesn't only effect adults; children are particularly susceptible, explains the psychologist on the project, Deborah Eakin. Bethel's ultimate goal is to use robots to help gather testimony from children, who tend to pick up on cues contained in questions. "It's a huge problem," Bethel says.

At the Starkville Police Department, a 10-minute drive from the university, officers want to use such a robotic interviewer to gather more reliable evidence from witnesses. The police work hard to avoid triggering the misinformation effect, says officer Mark Ballard, but even an investigator with the best intentions can let biases slip into the questions they ask a witness.

Children must usually be taken to a certified forensic child psychologist to be interviewed, something which can be difficult if the interviewer works in another jurisdiction. "You might eliminate that if you've got a robot that's certified for forensics investigations, and it's tough to argue that the robot brings any memories or theories with it from its background," says Ballard.

The study is "very interesting, very intriguing", says Selma Sabanovic, a roboticist at Indiana University. She is interested to see what happens as Bethel repeats the experiment with different robot shapes and sizes. She also poses a slightly darker question: "How would you design a robot to elicit the kind of information you want?"

This article appeared in print under the headline "The robot inquisition"

It's all about how you say it

When providing new information, rather than helping people recall events (see main story), a robot's rhetoric and body language can make a big difference to how well it gets its message across.

Bilge Mutlu of the University of Wisconsin-Madison had two robots compete to guide humans through a virtual city. He found that the robot which used rhetorical language drew more people to follow it. For example, the robot saying "this zoo will teach you about different parts of the world" did less well than one saying "visiting this zoo feels like travelling the world, without buying a plane ticket". The work will be presented at the Human-Robot Interaction conference in Tokyo next month.

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North Korea nuclear test could "tie hands" of South: Ban Ki-moon

UNITED NATIONS: UN leader Ban Ki-moon warned on Thursday that a nuclear test by North Korea could blow up hopes of an eventual reconciliation by "tying the hands" of the South's incoming president.

Ban, a former South Korean foreign minister, said incoming South Korean president Park Geun-Hye is "very much committed" to improving relations with North Korea.

"If they conduct this nuclear test, it may be the case that they are effectively tying the hands of the new president of Korea," Ban told a small group of reporters, including AFP.

"It may take a long time before any initiative between North and South can take place to normalise this relationship," he said, adding to international warnings to the isolated North.

Park will take over on February 25 from President Lee Myung-Bak, who warned on Thursday of "serious consequences" if Pyongyang stages the test.

The two sides have been divided since the end of the 1950-53 Korean war, and the 2010 sinking of a South Korean warship and a subsequent missile attack further escalated the rivalry.

A third test of an atomic weapon would be going in "the wrong direction" said Ban, highlighting UN resolutions that imposed tough sanctions after blasts in 2006 and 2009.

The UN Security Council has already threatened "significant" measures if North Korea stages a new breach of the resolutions. Ban said he has been discussing the North's moves "with key countries."

Ban said the Stalinist government should do more to help its people. "The humanitarian situation is dire in DPRK," Ban said, using the acronym of the North's official name, the Democratic People's Republic of Korea.

He said nations had not given money to UN humanitarian efforts in North Korea "because of this crisis and the very tense situation on the Korean peninsula."

Ban said he had been forced to use money from the UN's emergency fund to support relief efforts in North Korea, where there is again widespread hunger.

- AFP/de

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First complete 'bionic man' unveiled in U.K.

He's got blood flowing through him, but he sure isn't human. Meet Rex, the world's first complete "bionic man."

Rex has the face of a man; prosthetic limbs; a functional artificial blood-circulatory system; and artificial organs including a pancreas, kidney, spleen, and trachea. At 6.5-feet tall, Rex is valued at a whopping $1 million.

Created for the TV documentary series "How to Build a Bionic Man," Rex was constructed by a team of roboticists. The researchers say they wanted to test scientific boundaries and demonstrate how modern science is beginning to catch up with sci-fi in the race to replace body parts with man-made alternatives.

In the future, people may be able to fix a failing organ without having a transplant. The agonizing wait for a matching donor could be a thing of the past.

Bertolt Meyer, a social psychologist at the University of Zurich, was in London with other researchers to demonstrate how the bionic man works.

"One of my personal favorites is the artificial blood that runs through these tubings, because this is made of nanoparticles that are able to bind oxygen and give them off, just like real blood can do, but this isn't real blood, this is nanoparticles," Meyer told reporters yesterday.

"Also the fact that they are very close to an implantable artificial kidney that will actually be able to replace a failing kidney without the necessity of a kidney transplant. So think of the great benefits technology like that would bring. I knew fairly much about prosthetic limbs apparently, but what we are close to accomplishing in terms of artificial organs -- I find that absolutely mind boggling."

Rex is on display as part of a free exhibit called "How Much of You Can Be Rebuilt?" at the Science Museum in London. The exhibit runs through March 11.

This story originally appeared on CBSNews.com.

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Asteroid to Make Closest Flyby in History

Talk about too close for comfort. In a rare cosmic encounter, an asteroid will barnstorm Earth next week, missing our planet by a mere 17,200 miles (27,700 kilometers).

Designated 2012 DA14, the space rock is approximately 150 feet (45 meters) across, and astronomers are certain it will zip harmlessly past our planet on February 15—but not before making history. It will pass within the orbits of many communications satellites, making it the closest flyby on record. (Read about one of the largest asteroids to fly by Earth.)

"This is indeed a remarkably close approach for an asteroid this size," said Paul Chodas, a research scientist at NASA's Jet Propulsion Laboratory Near Earth Object (NEO) program office in Pasadena, California.

"We estimate that an asteroid of this size passes this close to the Earth only once every few decades."

The giant rock—half a football field wide—was first spotted by observers at the La Sagra Observatory in southern Spain a year ago, soon after it had just finished making a much more distant pass of the Earth at 2.6 million miles (4.3 million kilometers) away.

This time around however, on February15 at 2:24 pm EST, the asteroid will be passing uncomfortably close—ten times closer than the orbit of the moon—flying over the eastern Indian Ocean near Sumatra (map). (Watch: "Moon 101.")

Future Impact?

Chodas and his team have been keeping a close eye on the cosmic intruder, and orbital calculations of its trajectory show that there is no chance for impact.

But the researchers have not yet ruled out future chances of a collision. This is because asteroids of this size are too faint to be detected until they come quite close to the Earth, said Chodas.

"There is still a tiny chance that it might hit us on some future passage by the Earth; for example there is [a] 1-in-200,000 chance that it could hit us in the year 2080," he said.

"But even that tiny chance will probably go away within the week, as the asteroid's orbit gets tracked with greater and greater accuracy and we can eliminate that possibility."

Earth collision with an object of this size is expected to occur every 1,200 years on average, said Donald Yeomans, NEO program manager, at a NASA news conference this week.

DA14 has been getting closer and closer to Earth for quite a while—but this is the asteroid's closest approach in the past hundred years. And it probably won't get this close again for at least another century, added Yeomans.

While no Earth impact is possible next week, DA14 will pass 5,000 miles inside the ring of orbiting geosynchronous weather and communications satellites; so all eyes are watching the space rock's exact trajectory. (Learn about the history of satellites.)

"It's highly unlikely they will be threatened, but NASA is working with satellite providers, making them aware of the asteroid's pass," said Yeomans.

Packing a Punch

Experts say an impact from an object this size would have the explosive power of a few megatons of TNT, causing localized destruction—similar to what occurred in Siberia in 1908.

In what's known as the "Tunguska event," an asteroid is thought to have created an airburst explosion which flattened about 750 square miles (1,200 square kilometers) of a remote forested region in what is now northern Russia (map).

In comparison, an impact from an asteroid with a diameter of about half a mile (one kilometer) could temporarily change global climate and kill millions of people if it hit a populated area.

Timothy Spahr, director of the Minor Planet Center at Cambridge, Massachusetts, said that while small objects like DA14 could hit Earth once a millennia or so, the largest and most destructive impacts have already been catalogued.

"Objects of the size that caused the extinction of the dinosaurs have all been discovered," said Spahr. (Learn about what really happened to the dinosaurs.)

A survey of nearly 9,500 near-Earth objects half a mile (one kilometer) in diameter is nearly complete. Asteroid hunters expect to complete nearly half of a survey of asteroids several hundred feet in diameter in the coming years.

"With the existing assets we have, discovering asteroids rapidly and routinely, I continue to expect the world to be safe from impacts in the future," added Spahr.

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Alleged Cop-Killer Has Calif. Region on Edge

The truck owned and driven by suspected cop killer Christopher Dorner during his alleged rampage through the Los Angeles area was found deserted and in flames on the side of Bear Mountain, Calif., this afternoon.

Heavily armed SWAT team members descended onto Bear Mountain from a helicopter manned with snipers today to investigate the fire. The San Bernadino Sheriff's Department confirmed the car was Dorner's.

Dorner, a former Los Angeles police officer and Navy reservist, is believed to have killed one police officer and injured two others early this morning in Riverside, Calif. He is also accused of killing two civilians on Sunday after releasing a scathing "manifesto" alleging grievances committed by the police department while he worked for it and warning of coming violence toward cops.

Heavily armed officers spent much of Thursday searching for signs of Dorner, investigating multiple false leads into his whereabouts and broadcasting his license plate and vehicle description across the California Highway System.

Around 3:45 p.m. ET, police responded to Bear Mountain, where two fires were reported, and set up a staging area in the parking lot of a ski resort. They did not immediately investigate the fires, but sent a small team of heavily armed officers up in the helicopter to descend down the mountain toward the fire.

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The officers, carrying machine guns and searching the mountain for any sign of Dorner, eventually made it to the vehicle and identified it as belonging to Dorner. They have not yet found Dorner.

Late this afternoon, CNN announced that Dorner had sent a package containing his manifesto and a DVD to its offices.

Police officers across Southern California were on the defensive today, scaling back their public exposure, no longer responding to "barking-dog calls" and donning tactical gear outdoors.

Police departments have stationed officers in tactical gear outside police departments, stopped answering low-level calls and pulled motorcycle patrols off the road in order to protect officers who might be targets of Dorner's alleged rampage.

"We've made certain modifications of our deployments, our deviations today, and I want to leave it at that, and also to our responses," said Chief Sergio Diaz of the police department in Riverside, Calif., where the officers were shot. "We are concentrating on calls for service that are of a high priority, threats to public safety, we're not going to go on barking dog calls today."

Sgt. Rudy Lopez of the Los Angeles Police Department said Dorner is "believed to be armed and extremely dangerous."

Early Thursday morning, before they believe he shot at any police officers, Dorner allegedly went to a yacht club near San Diego, where police say he attempted to steal a boat and flee to Mexico.

He aborted the attempted theft when the boat's propeller became entangled in a rope, law enforcement officials said. It was then that he is believed to have headed to Riverside, where he allegedly shot two police officers.

"He pointed a handgun at the victim [at the yacht club] and demanded the boat," said Lt. David Rohowits of the San Diego Police Department.

Police say the rifle marksman shot at four officers in two incidents overnight, hitting three of them: one in Corona, Calif., and the two in Riverside, Calif.

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