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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Japan says China ships off disputed isles

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TOKYO: Four Chinese government ships entered territorial waters around Japan-controlled islands at the centre of a dispute Monday, the Japanese coastguard said.

The four marine surveillance ships were seen moving within 12 nautical miles of the islands, known as the Senkakus in Japan and the Diaoyus in China, just before midday, the coastguard said in a statement.

It was the first time since December 31 -- and the 21st time since Japan nationalised the islands in September -- that any state-owned Chinese ship has been seen in the archipelago's waters, which lie in the East China Sea.

A state-owned Chinese plane flew through airspace over the islands early last month. Tokyo responded by scrambling fighter jets and said it was the first time Beijing had breached its airspace since at least 1958.

On Saturday, another Chinese state-owned plane approached the islands without entering the airspace, prompting another Japanese fighter jet dispatch.

-AFP/ac



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Nvidia launches Shield, new gaming device at CES

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Nvidia Shield

Nvidia CEO Jen-Hsun Huang unveils Nvidia Shield, a brand-new gaming device that leverages Android and the Tegra 4 quad-core processor.



(Credit:
James Martin/CNET)


LAS VEGAS--Who says you can't teach an old chipmaker new tricks? Not Nvidia. At CES, the company announced its own gaming device, Shield, which will bear its brand name as well as its quad-core Tegra 4 processor.



Shield looks like a portable
Xbox controller with a screen. It's got analog joysticks, buttons, and controllers. Shield promises between 5 and 10 hours of gameplay.


"It's pure
Android," says Nvidia CEO Jen-Hsun Huang. There's nothing proprietary about it; all jacks are standard and the platform is open. It comes with a microSD card slot.


Shield can connect to the cloud to play Tegra Zone games, and also supports multiplayer mode.


Big strides
The move from making chipsets to assembling the hardware that houses them is a bold one for Nvidia, which traditionally partners with device-makers to power their mobile and desktop computing hardware.


Becoming a hardware manufacturer in addition to creating processors would give Nvidia another revenue stream, as well as greater latitude in device designs that house their chips.



Nvidia Shield

A closer look at, Nvidia Shield for hardcore gamers.



(Credit:
James Martin/CNET)


Though a surprising move, Nvidia does have some experience speccing out and creating devices. The company currently builds reference models that they then actively pitch to hardware partners, like Asus and Acer, for instance.


Most recently, Nvidia partnered with Leyden Energy to provide a longer-lasting battery for a
tablet reference design.

Nvidia isn't showing off its new tablet tonight, but CNET tablet reviewer Eric Franklin will get photos, video, and first impressions as soon as possible.

More to come...

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Best Pictures: 2012 Nat Geo Photo Contest Winners

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Pastor Accused of Killing Wives Faces Trial

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Jury selection is scheduled to begin Monday for Pastor Arthur Schirmer, who is accused of killing his second wife and then staging a car accident to hide it.


Schirmer, 64, also faces a second trial at a later date for the death of his first wife. He has said he is innocent of all charges.


In 2008, the pastor and his wife, Betty, were involved in what appeared at the time to be a car crash. Schirmer told police at the time that he had been driving 55 mph and swerved to miss a deer, causing him to drive off the road, according to a police affidavit obtained by ABC News.


Schirmer also said at the time that his wife's head had come forward and struck the windshield, according to the affidavit. Betty died a day later and her body was cremated at the request of Schirmer.


It wasn't until a grisly suicide in 2010 inside Schirmer's office that authorities decided to revisit the case of Betty Schirmer's death and arrest the pastor.


The man who broke in and shot himself at the desk in Schirmer's office at the Reeders United Methodist Church, Joseph Mustante, was the husband of the pastor's secretary, Cynthia Mustante, Poconos Township Police Detective James Wagner said.






Pocono Record, David Kidwell/AP Photo











Mustante's suicide was prompted by the discovery that his wife and the pastor had apparently been having an affair, Wagner said. He was alone at the time of his death.


Investigators looking into the suicide say that several church parishioners had concerns about the deaths of Schirmer's two wives.


"That suicide eventually exposed the affair publicly and subsequent to that, questions arose about the loss of [Schirmer's] wives and his character became questionable," Wagner said.


Relaunching the investigation into the two deaths, Wagner said he quickly suspected that "foul play existed, and the car crash was staged," allegedly, by Schirmer. Wagner said investigators also believed there was something "suspicious" about the first wife's death, a marriage that investigators had not known about prior to the suicide.

Investigators Look Into Deaths of Rev. Arthur Schirmer's Wives



Schirmer's first wife, Jewel, died in April 1999 from a traumatic brain injury after she purportedly fell down a flight of stairs in Lebanon, Pa., Wagner said.


Lebanon is about 100 miles southwest of Reeders, where Schrimer later moved with his second wife.


At the time of Jewel's death, Wagner said, a relative told police that he suspected Schirmer may have had a hand in his wife's death but that the investigation was "never completed."


On Dec. 11, 2012 -- more than 13 years after Jewel died, a Lebanon County judge ruled Schirmer would be tried for her murder.


When investigators looked at the death of Betty Schirmer, they saw inconsistencies, Wagner said.


"There was no airbag deployment and it simply looked like a car that had driven off the road at a very low speed," Wagner said. "It didn't match the injuries to [Betty's head].


"I know there are people out there who probably know him and feel like there is absolutely no way he would be capable of doing this," Wagner of Schirmer. "But they clearly don't know him."



Read More..

Silent Skype calls can hide secret messages

Label:








































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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Indian troops kill Pakistani soldier in Kashmir

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ISLAMABAD: A Pakistani soldier was killed and another wounded Sunday when Indian troops stormed a military post on the two countries' de facto border in Kashmir, the military said.

It said an exchange of fire was continuing after the Indian incursion across the Line of Control marking the frontier in the Haji Pir sector, 80 kilometres (49 miles) north of Islamabad.

Indian troops had crossed the line and "physically raided a checkpost named Sawan Patra", Pakistan's military said in a statement.

"Pakistan Army troops effectively responded to the attack successfully. One Pakistani soldier embraced martyrdom while another was critically injured," it said.

The Indian troops retreated, leaving behind a gun and a dagger, and an exchange of fire was continuing, the military said.

Muslim-majority Kashmir is a Himalayan region which India and Pakistan both claim in full but rule in part. It was the cause of two of their three wars since independence from Britain in 1947.

India suspended its peace process with Pakistan after deadly attacks by Pakistan-based militants in 2008 in Mumbai. Talks only resumed in February last year.

Both sides remain deadlocked over Kashmir but have made some progress on less contentious subjects such as trade.

The nuclear-armed neighbours have observed a ceasefire in Kashmir since November 2003 but there have been occasional small-time clashes and accusations of violations from both sides.

Kashmir has been racked by militancy since 1989 when an insurgency against Indian rule erupted. Around 47,000 people have died, though militant violence has decreased in recent years.

- AFP/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.
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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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