Cryptographic and Information-Theoretic Security Capacities for General Arbitrarily Varying Wiretap Channels

We compare the strong secrecy capacities of Arbitrarily Varying Wiretap Channels AVWCs and General Arbitrary Varying Wiretap Channels GAVWCs with their capacities under semantic secrecy constraint and other equivalent cryptographic secrecy constraints. It turns out that the average error and stro...

Hackers Are Posting the Claude Code Leak With Bonus Malware

Plus: The FBI says a recent hack of its wiretap tools poses a national security risk, attackers stole Cisco source code as part of an ongoing supply chain hacking spree, and more...

A week in security (March 9 – March 15)

Last week on Malwarebytes Labs: Watch out for fake Malwarebytes renewal notices in your calendar Google patches two Chrome zero-days under active attack. Update now Attackers impersonate Temu in ClickFix $Temu airdrop scam Apple patches Coruna exploit kit flaws for older iOS versions This Android...

Hackers may have breached FBI wiretap network via supply chain

Investigators are worried that a recent attack on a critical FBI system was more than just a random hit, and that another nation-state might have been involved. On February 17, the FBI flagged irregular network activity that led straight to its Digital Collection System Network. That system...

Artificial Noise Versus Artificial Noise Elimination: Redefining Scaling Laws of Physical Layer Security

Artificial noise AN is a key physical-layer security scheme for wireless communications over multiple-input multiple-output wiretap channels. Recently, artificial noise elimination ANE has emerged as a strategy to mitigate the impact of AN on eavesdroppers. However, the influence of ANE on the...

Secure Integrated Sensing and Communication against Communication and Sensing Eavesdropping

Sensing privacy and communication confidentiality play fundamentally different but interconnected roles in adversarial wireless environments. Capturing this interplay within a single physical-layer framework is particularly challenging in integrated sensing and communication ISAC systems, where t...

Helper-Assisted Coding for Gaussian Wiretap Channels: Deep Learning Meets PhySec

Consider the Gaussian wiretap channel, where a transmitter wishes to send a confidential message to a legitimate receiver in the presence of an eavesdropper. It is well known that if the eavesdropper experiences less channel noise than the legitimate receiver, then it is impossible for the...

Warnings Mount in Congress Over Expanded US Wiretap Powers

Experts tell US lawmakers that a crucial spy program’s safeguards are failing, allowing intel agencies deeper, unconstrained access to Americans’ data...

An Efficient Secret Communication Scheme for the Bosonic Wiretap Channel

We propose a new secret communication scheme over the bosonic wiretap channel. It uses readily available hardware such as lasers and direct photodetectors. The scheme is based on randomness extractors, pulse-position modulation, and Reed-Solomon codes and is therefore computationally efficient. I...

A DRL-Empowered Multi-Level Jamming Approach for Secure Semantic Communication

Semantic communication SemCom aims to transmit only task-relevant information, thereby improving communication efficiency but also exposing semantic information to potential eavesdropping. In this paper, we propose a deep reinforcement learning DRL-empowered multi-level jamming approach to enhanc...

Feedback Lunch: Deep Feedback Codes for Wiretap Channels

We consider reversely-degraded wiretap channels, for which the secrecy capacity is zero if there is no channel feedback. This work focuses on a seeded modular code design for the Gaussian wiretap channel with channel output feedback, combining universal hash functions for security and learned...

New WireTap Attack Extracts Intel SGX ECDSA Key via DDR4 Memory-Bus Interposer

In yet another piece of research, academics from Georgia Institute of Technology and Purdue University have demonstrated that the security guarantees offered by Intel's Software Guard eXtensions SGX can be bypassed on DDR4 systems to passively decrypt sensitive data. SGX is designed as a hardware...

Secure Satellite Communications Via Multiple Aerial RISs: Joint Optimization of Reflection, Association, and Deployment

Satellite communication is envisioned as a key enabler of future 6G networks, yet its wide coverage with high link attenuation poses significant challenges for physical layer security. In this paper, we investigate secure multi-beam, multi-group satellite communications assisted by aerial...

Shuffling for Semantic Secrecy

Deep learning draws heavily on the latest progress in semantic communications. The present paper aims to examine the security aspect of this cutting-edge technique from a novel shuffling perspective. Our goal is to improve upon the conventional secure coding scheme to strike a desirable tradeoff...

Linear and Numerical SDoF Bounds of Active RIS-Assisted MIMO Wiretap Interference Channel

The multiple-input multiple-output MIMO wiretap interference channel IC serves as a canonical model for information-theoretic security, where a multiple-antenna eavesdropper attempts to intercept communications in a two-user MIMO IC system. The secure degrees-of-freedom SDoF of an active...

China’s Salt Typhoon Hacks AT&T and Verizon, Accessing Wiretap Data: Report

China’s Salt Typhoon hacked AT&T, Verizon, and Lumen, compromising wiretap systems used in criminal investigations. The breach, linked…...

US Senate to Vote on a Wiretap Bill That Critics Call ‘Stasi-Like’

A controversial bill reauthorizing the Section 702 spy program may force whole new categories of businesses to eavesdrop on the US government’s behalf, including on fellow Americans...

Sinking Section 702 Wiretap Program Offered One Last Lifeboat

For months, US lawmakers have examined every side of a historic surveillance debate. With the introduction of the SAFE Act, all that’s left to do now is vote...

Google Settles $5 Billion Privacy Lawsuit Over Tracking Users in 'Incognito Mode'

Google has agreed to settle a lawsuit filed in June 2020 that alleged that the company misled users by tracking their surfing activity who thought that their internet use remained private when using the "incognito" or "private" mode on web browsers. The class-action lawsuit sought at least $5...

Messaging Service Wiretap Discovered through Expired TLS Cert

Fascinating story of a covert wiretap that was discovered because of an expired TLS certificate: The suspected man-in-the-middle attack was identified when the administrator of jabber.ru, the largest Russian XMPP service, received a notification that one of the servers’ certificates had expired...