计算机科学 > 密码和安全
[于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计算机中泄露出的秘密从计算机RAM中泄露
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摘要：空接系统与包括互联网在内的外部网络实际分离。 这种隔离是通过保持与wired或无线网络断开的空格计算机实现的，防止了与其他设备或网络的直接或远程通信。 在安全和隔离对于防止私人和机密信息泄露至关重要的敏感环境中，可采用空气差距措施。
在这份论文中，我们提出了攻击允许对手从空载计算机中泄露信息。 我们显示，一个受损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，以及加密密钥等。 以软件自定义的收音机(SDR)硬件，以及一个简单的现成天线，攻击者可以从远距离拦截传输的原始无线电信号。 信号随后可以被解码并被翻译回二进制信息。 我们讨论设计和实施，并介绍有关的工作和评价结果。 本文以每秒1000比特的方式提出了快速修改方法来泄露从空气加压的计算机中的数据。 最后，我们建议采取反措施来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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