Silent Skype calls can hide secret messages

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Got a secret message to send? Say it with silence. A new technique can embed secret data during a phone call on Skype. "There are concerns that Skype calls can be intercepted and analysed," says Wojciech Mazurczyk at the Institute of Telecommunications in Warsaw, Poland. So his team's SkypeHide system lets users hide extra, non-chat messages during a call.












Mazurczyk and his colleagues Maciej Karaś and Krysztof Szczypiorski analysed Skype data traffic during calls and discovered an opportunity in the way Skype "transmits" silence. Rather than send no data between spoken words, Skype sends 70-bit-long data packets instead of the 130-bit ones that carry speech.












The team hijacks these silence packets, injecting encrypted message data into some of them. The Skype receiver simply ignores the secret-message data, but it can nevertheless be decoded at the other end, the team has found. "The secret data is indistinguishable from silence-period traffic, so detection of SkypeHide is very difficult," says Mazurczyk. They found they could transmit secret text, audio or video during Skype calls at a rate of almost 1 kilobit per second alongside phone calls.












The team aims to present SkypeHide at a steganography conference in Montpellier, France, in June.


















































If you would like to reuse any content from New Scientist, either in print or online, please contact the syndication department first for permission. New Scientist does not own rights to photos, but there are a variety of licensing options available for use of articles and graphics we own the copyright to.




































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If you are having a technical problem posting a comment, please contact technical support.








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Giant squid filmed in Pacific depths: Japan scientists

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TOKYO: Scientists and broadcasters said Monday they have captured footage of an elusive giant squid up to eight metres (26 feet) long that roams the depths of the Pacific Ocean.

Japan's National Science Museum succeeded in filming the deep-sea creature in its natural habitat for the first time, working with Japanese public broadcaster NHK and the US Discovery Channel.

They spotted the squid at a depth of 630 meters (2,067 feet) using a submersible in July, some 15 kilometres (nine miles) east of Chichi island in the north Pacific Ocean.

The submarine with three people on board, including Tsunemi Kubodera from the museum, followed the enormous mollusc to a depth of 900 metres as it swam into the ocean abyss.

NHK showed footage of the silver-coloured creature, which had huge black eyes, as it swam against the current, holding a bait squid in its arms against the backdrop of dark oceanic depths.

The creature was about three metres long, but "estimated to be as long as eight metres if its two long arms had not been chopped off", Kubodera told AFP.

He gave no explanation for its missing arms.

He said it was the first video footage of a live giant squid in its natural habitat -- the depths of the sea where there is little oxygen.

Kobudera, a squid specialist, also filmed what he says was the first live video footage of a giant squid in 2006 but only from his boat after it was hooked and brought up to the surface.

The giant squid, "Architeuthis" to scientists, is sometimes described as one of the last mysteries of the ocean, being part of a world so hostile to humans that it has been little explored.

-AFP/fl



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Nvidia's GeForce Experience auto-optimizes gameplay

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Nvidia CEO Jen-Hsun Huang at CES 2013.

Nvidia CEO Jen-Hsun Huang addresses the press at CES 2013.



(Credit:
James Martin/CNET)


LAS VEGAS--Nvidia tonight launched GeForce Experience, which detects your PC settings and automatically adjusts gaming settings to offer the best graphical video game play experience without you having to manually adjust settings.


GeForce Experience, which comes bundled with the drivers, is an opt-in client.


Nvidia CEO Jen-Hsun Huang described GeForce Experience, or GFE, as a game console experience on a high-performance PC.


The new tool underscores the important of gaming for Nvidia.


We'll have more details to come...


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Best Pictures: 2012 Nat Geo Photo Contest Winners

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Silent Skype calls can hide secret messages

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Got a secret message to send? Say it with silence. A new technique can embed secret data during a phone call on Skype. "There are concerns that Skype calls can be intercepted and analysed," says Wojciech Mazurczyk at the Institute of Telecommunications in Warsaw, Poland. So his team's SkypeHide system lets users hide extra, non-chat messages during a call.












Mazurczyk and his colleagues Maciej Karaś and Krysztof Szczypiorski analysed Skype data traffic during calls and discovered an opportunity in the way Skype "transmits" silence. Rather than send no data between spoken words, Skype sends 70-bit-long data packets instead of the 130-bit ones that carry speech.












The team hijacks these silence packets, injecting encrypted message data into some of them. The Skype receiver simply ignores the secret-message data, but it can nevertheless be decoded at the other end, the team has found. "The secret data is indistinguishable from silence-period traffic, so detection of SkypeHide is very difficult," says Mazurczyk. They found they could transmit secret text, audio or video during Skype calls at a rate of almost 1 kilobit per second alongside phone calls.












The team aims to present SkypeHide at a steganography conference in Montpellier, France, in June.


















































If you would like to reuse any content from New Scientist, either in print or online, please contact the syndication department first for permission. New Scientist does not own rights to photos, but there are a variety of licensing options available for use of articles and graphics we own the copyright to.




































All comments should respect the New Scientist House Rules. If you think a particular comment breaks these rules then please use the "Report" link in that comment to report it to us.


If you are having a technical problem posting a comment, please contact technical support.








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Community Policing System extended to 6 more NPCs

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SINGAPORE: The Singapore Police Force will implement its Community Policing System (COPS) at six more Neighbourhood Police Centres (NPC) across the island.

Minister at the Prime Minister's Office S Iswaran made the announcement at a community event on Sunday.

The six NPCs are at Bishan, Punggol, Sengkang, Woodlands East, Woodlands West and Clementi.

Mr Iswaran, who is also the Second Minister for Home Affairs, said this is part of the second phase of the COPS rollout.

The COPS system was introduced in May last year in Tampines and Bukit Merah East.

It is a nationwide transformation of front-line policing strategies which aims to improve the way in which the current NPCs work with the community.

Under COPS, NPCs will be strengthened with additional resources for tackling local crime concerns and enhancing community engagement.

Over the next three years, the Police will progressively implement COPS across all 35 NPCs in Singapore.

Mr Iswaran said the Police's experience with the rollout of COPS during the first phase has been positive.

Residents have been pleased with the increased Police presence.

Many have also come forward to take a more active role in partnering the Police, for example through joint patrols.

The West Coast Protectors was also launched on Sunday.

It is a new Residents' Watch Group jointly formed by the Clementi NPC and the Clementi constituency.

So far some 300 volunteers have signed up to be Protectors.

- CNA/fa



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Nvidia at 2013 CES: Join us Sunday, 8 p.m. PT (live blog)

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Nvidia starts the 2013 International CES early with a press conference at 8 p.m. PT (11 p.m. ET) on Sunday, Jan. 6, and CNET will be there to cover it live. We'll have a live video stream, along with a blog full of news and analysis, as it happens.

You can tune into the blog and video stream here:

CNET's live coverage of Nvidia's 2013 CES press conference

Nvidia has been pretty quiet about any possible announcements at
CES, but the graphics chipmaker is likely to talk up Tegra, its processor for mobile devices. The company has had some success getting the chip into
tablets over the past year, but it continues to struggle in smartphones. Nvidia is counting on its new integrated processor, which combines the apps processor with the wireless connectivity on the same piece of silicon, to change that.

An alleged leak about Nvidia's Tegra 4 from last month showed 72 graphics cores, six times as many as those found in the current-generation Tegra 3. That many cores would mean substantially improved performance for smartphones, tablets, and other devices.
Read More..

Best Pictures: 2012 Nat Geo Photo Contest Winners

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Gun Show Near Newtown Goes on Despite Anger

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A little more than 40 miles from Sandy Hook Elementary School, where last month 20 first graders and six staff members were massacred, gun dealers and collectors alike ignored calls to cancel a gun show, and gathered for business in Stamford, Conn.


Four other gun shows with an hour of Newtown, Conn., recently cancelled their events in the wake of the shootings, when 20-year-old Adam Lanza broke in to the elementary school with a semi-automatic assault rifle and three other guns.


The organizers in Stamford emphasized their show only displayed antique and collectible guns, not military style assault weapons like the one used by Lanza in Sandy Hook.


Still, Stamford Mayor Michael Pavia had called for the show to close its doors, calling it "insensitive" to hold so close to the murders.


Gun show participant Sandy Batchelor said he wasn't sure about whether going ahead with the show was "insensitive," but said the shooter should be blamed, not the weapons he used.


"I don't have a solid opinion on [whether it is insensitive]," Batchelor said. "I'm not for or against it. I would defend it by saying it wasnt the gun."


In nearby Waterbury, the community cancelled a show scheduled for this weekend.


"I felt that the timing of the gun show so close to that tragic event would be in bad taste," Waterbury Police Chief Chief Michael J. Gugliotti said.












National Rifle Association News Conference Interrupted by Protesters Watch Video





Gugliotti has halted permits for gun shows, saying he was concerned about firearms changing hands that might one day be used in a mass shooting.


Across the state line in White Plains, N.Y, Executive Rob Astorino also canceled a show, three years after ending a had that had been in place since the 1999 Columbine High School shooting in Colorado. He said he felt the show would be inappropriate now.


But across the country, farther away from Connecticut, attendance at gun shows is spiking, and some stores report they can hardly keep weapons on their shelves with some buyers fearful of that the federal government will soon increase restrictions on gun sales and possibly ban assault weapons altogether.


"We sold 50-some rifles in days," said Jonathan O'Connor, store manager of Gun Envy in Minnesota.


President Obama said after the Sandy Hook shooting that addressing gun violence would be one of his priorities and Rep. Nancy Pelosi, D-Calif., said she would introduce an assault weapons ban this month.


But it is not just traditional advocates of gun control that have said their need to be changes in gun laws since the horrific school shooting.


Republican Sen. Kay Bailey Hutchison of Texas and Virginia Sen. Mark Warner, a Democrat but a long-time opponent of gun control who like Hutchison has received an A rating from the NRA, have both come out in support of strengthening gun laws.


In Stamford, gun dealer Stuart English said participants at the gun show there are doing nothing wrong.


"I have to make a living. Life goes on," gun dealer Stuart English said.


ABC News asked English, what he thought about the mayor of Stamford calling the show "insensitive."


"He's wrong," English said. "This is a private thing he shouldn't be expressing his opinion on."


If you have a comment on this story or have a story idea, you can tweet this correspondent @greenblattmark.


The Associated Press contributed to this report.



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Graphic in-car crash warnings to slow speeding drivers

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Paul Marks, chief technology correspondent


142093734.jpg

(Image: Cityscape/a.collection/Getty)


"You would die if you crashed right now." Would such a warning make you take your foot off the accelerator? That's the idea behind a scheme to warn drivers of the consequences of speeding developed by engineers at Japan's Fukuoka Institute of Technology and heavy goods vehicle maker UD Trucks, also in Japan. They are developing what they call a "safe driving promotion system" that warns drivers what kind of crash could ensue if they don't slow down.






Their patent-pending system uses the battery of radar, ultrasound sonar and laser sensors found in modern cars and trucks to work out the current kinetic energy of a vehicle. It also checks out the distance to the vehicle in front and keeps watch on its brake lights, too. An onboard app that has learned the driver's reaction time over all their previous trips then computes the likelihood of collision - and if the driver's speed is risky, it displays the scale of damage that could result.


The warning that flashes up could vary from something like a potential whiplash injury due to a rear-end shunt to a fatal, car-crushing collision with fire. The inventors hope this kind of in-car advice will promote safety more forcefully than current warning systems, which merely display the distance to the vehicle in front. "A sense of danger will be awakened in the driver that makes them voluntarily refrain from dangerous driving," they predict.




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