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Air-gapped networks are wired with Ethernet cables since wireless connections are strictly prohibited. In this paper we present LANTENNA - a new type of electromagnetic attack allowing adversaries to leak sensitive data from isolated,…

Cryptography and Security · Computer Science 2021-10-04 Mordechai Guri

It has been assumed that the physical separation (air-gap) of computers provides a reliable level of security, such that should two adjacent computers become compromised, the covert exchange of data between them would be impossible. In this…

Cryptography and Security · Computer Science 2015-03-30 Mordechai Guri , Matan Monitz , Yisroel Mirski , Yuval Elovici

Air-gapped computers are systems that are kept isolated from the Internet since they store or process sensitive information. In this paper, we introduce an optical covert channel in which an attacker can leak (or, exfiltlrate) sensitive…

Cryptography and Security · Computer Science 2020-02-05 Mordechai Guri , Dima Bykhovsky , Yuval Elovici

Air-gapped systems are isolated from the Internet due to the sensitive information they handle. This paper presents COVID-bit, a new COVert channel attack that leaks sensitive information over the air from highly isolated systems. The…

Cryptography and Security · Computer Science 2022-12-08 Mordechai Guri

In this paper, we show that attackers can exfiltrate data from air-gapped computers via Wi-Fi signals. Malware in a compromised air-gapped computer can generate signals in the Wi-Fi frequency bands. The signals are generated through the…

Cryptography and Security · Computer Science 2020-12-15 Mordechai Guri

Personal data has become one of the most valuable assets and lucrative targets for attackers in the modern digital world. This includes personal identification information (PII), medical records, legal information, biometric data, and…

Cryptography and Security · Computer Science 2024-09-09 Mordechai Guri

Physical isolation, so called air-gapping, is an effective method for protecting security-critical computers and networks. While it might be possible to introduce malicious code through the supply chain, insider attacks, or social…

Cryptography and Security · Computer Science 2021-06-11 Niclas Kühnapfel , Stefan Preußler , Maximilian Noppel , Thomas Schneider , Konrad Rieck , Christian Wressnegger

Many organizations protect secure networked devices from non-secure networked devices by assigning each class of devices to a different logical network. These two logical networks, commonly called the host network and the guest network, use…

Cryptography and Security · Computer Science 2019-08-08 Adar Ovadya , Rom Ogen , Yakov Mallah , Niv Gilboa , Yossi Oren

Air-gap covert channels are special types of covert communication channels that enable attackers to exfiltrate data from isolated, network-less computers. Various types of air-gap covert channels have been demonstrated over the years,…

Cryptography and Security · Computer Science 2020-04-15 Mordechai Guri

Information is the most critical asset of modern organizations, and accordingly coveted by adversaries. When highly sensitive data is involved, an organization may resort to air-gap isolation, in which there is no networking connection…

Cryptography and Security · Computer Science 2014-11-04 Mordechai Guri , Gabi Kedma , Assaf Kachlon , Yuval Elovici

Although organizations are continuously making concerted efforts to harden their systems against network attacks by air-gapping critical systems, attackers continuously adapt and uncover covert channels to exfiltrate data from air-gapped…

Cryptography and Security · Computer Science 2022-10-17 Matthew Chan , Nathaniel Snyder , Marcus Lucas , Luis Garcia , Oleg Sokolsky , James Weimer , Insup Lee , Paulo Tabuada , Saman Zonouz , Mani Srivastava

Because computers may contain or interact with sensitive information, they are often air-gapped and in this way kept isolated and disconnected from the Internet. In recent years the ability of malware to communicate over an air-gap by…

Cryptography and Security · Computer Science 2016-06-21 Mordechai Guri , Yosef Solewicz , Andrey Daidakulov , Yuval Elovici

he technology on infrared remote control is widely applied in human daily life. It is also applied in the place with a top security level. Infrared remote control signal is regarded as a simple, safe and clean resource that can help us…

Cryptography and Security · Computer Science 2019-05-21 Zheng Zhou , Weiming Zhang , Nenghai Yu

Air-gapped systems are physically separated from external networks, including the Internet. This isolation is achieved by keeping the air-gap computers disconnected from wired or wireless networks, preventing direct or remote communication…

Cryptography and Security · Computer Science 2024-09-05 Mordechai Guri

Highly secure devices are often isolated from the Internet or other public networks due to the confidential information they process. This level of isolation is referred to as an 'air-gap .' In this paper, we present a new technique named…

Cryptography and Security · Computer Science 2022-08-23 Mordechai Guri

Air-gapped systems are disconnected from the Internet and other networks because they contain or process sensitive data. However, it is known that attackers can use computer speakers to leak data via sound to circumvent the air-gap defense.…

Cryptography and Security · Computer Science 2024-09-10 Mordechai Guri

Infrared (IR) light is invisible to humans, but cameras are optically sensitive to this type of light. In this paper, we show how attackers can use surveillance cameras and infrared light to establish bi-directional covert communication…

Cryptography and Security · Computer Science 2017-09-19 Mordechai Guri , Dima Bykhovsky , Yuval Elovici

Covert channel techniques are used by attackers to transfer data in a way prohibited by the security policy. There are two main categories of covert channels: timing channels and storage channels. This paper introduces a new storage channel…

Cryptography and Security · Computer Science 2011-05-17 Steffen Wendzel

This paper introduces a new type of attack on isolated, air-gapped workstations. Although air-gap computers have no wireless connectivity, we show that attackers can use the SATA cable as a wireless antenna to transfer radio signals at the…

Cryptography and Security · Computer Science 2022-07-18 Mordechai Guri

Air-gapped systems are considered highly secure against data leaks due to their physical isolation from external networks. Despite this protection, ultrasonic communication has been demonstrated as an effective method for exfiltrating data…

Cryptography and Security · Computer Science 2025-06-11 Mordechai Guri
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