计算机科学 > 密码和安全
[2024年9月3日提交]
标题：RAMBO：通过拼写隐蔽无线电信号从Air-Gap计算机中泄露机密从计算机RAM中泄露
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摘要：空载系统与外部网络，包括互联网实际分离。 这种隔离是通过保持与wired或无线网络断开的空格计算机，防止与其他设备或网络的直接或远程通信来实现的。 在安全和隔离对防止私人和机密信息泄漏至关重要的敏感环境中，可采用空气差距措施。
在本文中，我们提出攻击，允许对手从空载计算机中泄露信息。 我们显示，失密计算机上的恶意软件可以从内存巴士(RAM)产生无线电信号。 使用软件产生的无线电信号，恶意软件可以编码敏感信息，如文件，图像，密钥日志，生物鉴别信息，以及加密密钥。 凭借软件定义的无线电(SDR)硬件，以及简单的现成天线，攻击者可以从远距离拦截传输的原始无线电信号。 信号然后可以解码并翻译为二进制信息。 我们讨论设计和实施，介绍有关工作和评价的结果。 本文提出快速修改方法，以每秒1000比特从空气加载计算机中泄露数据。 最后，我们提议采取反措施，减轻这种无带状空中差距的威胁。
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Computer Science > Cryptography and Security
[Submitted on 3 Sep 2024]
Title:RAMBO: Leaking Secrets from Air-Gap Computers by Spelling Covert Radio Signals from Computer RAM
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Abstract: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 with other devices or networks. Air-gap measures may be used in sensitive environments where security and isolation are critical to prevent private and confidential information leakage.
In this paper, we present an attack allowing adversaries to leak information from air-gapped computers. We show that malware on a compromised computer can generate radio signals from memory buses (RAM). Using software-generated radio signals, malware can encode sensitive information such as files, images, keylogging, biometric information, and encryption keys. With software-defined radio (SDR) hardware, and a simple off-the-shelf antenna, an attacker can intercept transmitted raw radio signals from a distance. The signals can then be decoded and translated back into binary information. We discuss the design and implementation and present related work and evaluation results. This paper presents fast modification methods to leak data from air-gapped computers at 1000 bits per second. Finally, we propose countermeasures to mitigate this out-of-band air-gap threat.
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