Tag Archive for: laser

Computer attacks with laser light


IT security: Computer attacks with laser light
As data may be transferred via light, security critical systems need optical protection. Credit: Andrea Fabry, KIT

Computer systems that are physically isolated from the outside world (air-gapped) can still be attacked. This is demonstrated by IT security experts of the Karlsruhe Institute of Technology (KIT) in the LaserShark project. They show that data can be transmitted to light-emitting diodes of regular office devices using a directed laser. With this, attackers can secretly communicate with air-gapped computer systems over distances of several meters. In addition to conventional information and communication technology security, critical IT systems need to be protected optically as well.

Hackers attack computers with lasers. This sounds like a scene from the latest James Bond movie, but it actually is possible in reality. Early December 2021, researchers of KIT, TU Braunschweig, and TU Berlin presented the LaserShark attack at the 37th Annual Computer Security Applications Conference (ACSAC). This research project focuses on hidden communication via optical channels. Computers or networks in critical infrastructures are often physically isolated to prevent external access. “Air-gapping” means that these systems have neither wired nor wireless connections to the outside world. Previous attempts to bypass such protection via electromagnetic, acoustic, or optical channels merely work at short distances or low data rates. Moreover, they frequently allow for data exfiltration only, that is, receiving data.

Hidden optical channel uses LEDs in commercially available office devices

The Intelligent System Security Group of KASTEL—Institute of Information Security and Dependability of KIT, in cooperation with researchers from TU Braunschweig and TU Berlin, have now demonstrated a new attack: With a directed laser beam, an adversary can introduce data into air-gapped systems and retrieve data without additional hardware on-side at the attacked device. “This hidden optical communication uses…

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Computer attacks with laser light — ScienceDaily


Computer systems that are physically isolated from the outside world (air-gapped) can still be attacked. This is demonstrated by IT security experts of the Karlsruhe Institute of Technology (KIT) in the LaserShark project. They show that data can be transmitted to light-emitting diodes of regular office devices using a directed laser. With this, attackers can secretly communicate with air-gapped computer systems over distances of several meters. In addition to conventional information and communication technology security, critical IT systems need to be protected optically as well.

Hackers attack computers with lasers. This sounds like a scene from the latest James Bond movie, but it actually is possible in reality. Early December 2021, researchers of KIT, TU Braunschweig, and TU Berlin presented the LaserShark attack at the 37th Annual Computer Security Applications Conference (ACSAC). This research project focuses on hidden communication via optical channels. Computers or networks in critical infrastructures are often physically isolated to prevent external access. “Air-gapping” means that these systems have neither wired nor wireless connections to the outside world. Previous attempts to bypass such protection via electromagnetic, acoustic, or optical channels merely work at short distances or low data rates. Moreover, they frequently allow for data exfiltration only, that is, receiving data.

Hidden Optical Channel Uses LEDs in Commercially Available Office Devices

The Intelligent System Security Group of KASTEL — Institute of Information Security and Dependability of KIT, in cooperation with researchers from TU Braunschweig and TU Berlin, have now demonstrated a new attack: With a directed laser beam, an adversary can introduce data into air-gapped systems and retrieve data without additional hardware on-side at the attacked device. “This hidden optical communication uses light-emitting diodes already build into office devices, for instance, to display status messages on printers or telephones,” explains Professor Christian Wressnegger, Head of the Intelligent System Security Group of KASTEL. Light-emitting diodes (LEDs) can receiving light, although they are not designed to…

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Forget that Loon’s balloon burst, we just fired 700TB of laser broadband between two cities, says Google • The Register


Engineers at Google’s technology moonshot lab X say they used lasers to beam 700TB of internet traffic between two cities separated by the Congo River.

The capitals of the Republic of the Congo and the Democratic Republic of Congo, Brazzaville and Kinshasa, respectively, are only 4.8 km (about three miles) apart. The denizens of Kinshasa have to pay five times more than their neighbors in Brazzaville for broadband connectivity, though. That’s apparently because the fiber backbone to Kinshasa has to route more than 400 km (250 miles) around the river – no one wanted to put the cable through it.

There’s a shorter route for data to take between the cities. Instead of transmitting the information as light through networks of cables, it can be directly beamed over the river by laser.

In an effort dubbed Project Taara, X built two terminals, one in Brazzaville and another in Kinshasa, to transmit and receive data encoded in beams of laser light.

“In the same way traditional fibre uses light to carry data through cables in the ground, Taara’s wireless optical communication links use very narrow, invisible beams of light to deliver fiber-like speeds,” Baris Erkmen, Director of Engineering for Taara, explained today.

“To create a link, Taara’s terminals search for each other, detect the other’s beam of light, and lock-in like a handshake to create a high-bandwidth connection.”

About 700TB of data was exchanged over 20 days at speeds of up to 20 Gbps, with 99.9 per cent availability, with the help of Econet – the multinational telecoms giant, not the old Acorn networking system. The aim of the setup was to relay broadband internet traffic between the cities more as a test of the equipment than anything else.

A lot of effort went into tracking and pointing the light beam at a sensor a few kilometres away, and mitigating the effects of poor weather, interference from animals, and the like.

Diagram by Google of Project Taara beaming broadband over a river

Google’s…

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With a Laser, Researchers Say They Can Hack Alexa, Google Home or Siri – The New York Times

With a Laser, Researchers Say They Can Hack Alexa, Google Home or Siri  The New York Times
“HTTPS hijacking” – read more