A German computer scientist has cracked the codes used to encrypt calls made from more than 80 percent of the world’s mobile phones.
Karsten Nohl and his team of 24 hackers began working on the security algorithm for GSM (Global System for Mobiles) in August.
Developed in 1988, the system prevents the interception of calls by forcing phones and base stations to change frequencies constantly. Most of the UK’s mobile phones use the GSM system and the breach represents a potential threat to the security of mobile phone communication.
Nohl claims that armed with the code, which has been published online, and a laptop with two network cards, an eavesdropper could be recording phone calls within 15 minutes.
“This shows that existing GSM security is inadequate,” Nohl told the Chaos Communication Congress, an international annual meeting of hackers taking place in Berlin this week.
Nohl said he deciphered the code to force the industry to upgrade its security.
Nohl said conversations involving politicians or business leaders could easily be intercepted and they should invest in further encryption software.
The GSM Association, which represents the interests of the worldwide mobile communications industry, played down the security threat and said Nohl’s activity was “highly illegal.”
“We consider this research, which appears to be motivated in part by commercial considerations, to be a long way from being a practical attack on GSM,” said Claire Cranton, a spokeswoman. “To do this while supposedly being concerned about privacy is beyond me.”
Nohl, who has a doctorate in computer engineering from the University of Virginia, said his work was purely academic.
“We have written advice from our lawyers stating that our research is within the legal realm,” he said.
Simon Bransfield-Garth, the chief executive of encryption software firm Cellcrypt, said: “The code that has been cracked is for the 21-year-old 64-bit A5/1 GSM algorithm. In 2007 the GSM Association developed a 128-bit version, A5/3. However, most network operators have not invested to make the required upgrade.”
A US YouTuber who caused outrage for filming himself kissing a statue commemorating Korean wartime sex slaves has been sentenced to six months in prison, a court in Seoul said yesterday. Johnny Somali, 25, gained notoriety several years ago for recording himself doing a series of provocative stunts in South Korea and Japan, and streaming them on platforms such as YouTube and Twitch. South Korean authorities indicted Somali — whose real name is Ramsey Khalid Ismael — in 2024 on public order violations and obstruction of business, and banned him from leaving the country. “The court has sentenced him to six months in
Former Lima mayor Rafael Lopez Aliaga, a Peruvian presidential hopeful, gathered hundreds of supporters in Lima on Tuesday and gave authorities 24 hours to annul the first round of the country’s election over allegations of fraud. Lopez Aliaga is locked in a tight three-way race with two other candidates for second place in Sunday’s vote. The election runner-up wins a ticket to June’s presidential run-off against front-runner Keiko Fujimori. “I am giving them 24 hours to declare this electoral fraud null and void,” said Lopez Aliaga, surrounded by a crowd of several hundred supporters. “If it is not declared null and void tomorrow,
PAPAL RETORT: Pope Leo told reporters that he has ‘no fear, neither of the Trump administration nor speaking out loudly about the message of the Gospel’ US President Donald Trump has feuded with Pope Leo XIV over the Iran conflict — setting off an unholy row that could have serious political implications for the Republican leader back in the US. Trump has drawn barbs even from some allies over the attacks on the US-born pontiff, who has criticized the Trump administration over its immigration crackdown, the intervention in Venezuela and the Iran war. The president risks alienating the religious right in November’s crucial US midterm elections. So far the unprecedented clash between the leader of the most powerful military on Earth and the head of the world’s 1.4 billion
A 16-year-old boy has been charged with murder and aggravated sexual abuse in Florida in the death of his 18-year-old stepsister on a Carnival Cruise ship, the US Department of Justice said on Monday. Timothy Hudson was initially charged in February and subsequently indicted on March 10, but the breadth of the case was not known until a seal was lifted on Friday last week, weeks after US District Judge Beth Bloom in Miami said that he would be prosecuted as an adult at the request of the government. Anna Kepner had been traveling on the Carnival Horizon ship in November last
RSS