6 papers
Shape and Substance: Dual-Layer Side-Channel Attacks on Local Vision-Language Models
Eyal Hadad, Mordechai Guri
On-device Vision-Language Models (VLMs) promise data privacy via local execution. However, we show that the architectural shift toward Dynamic High-Resolution preprocessing (e.g.,…
Pico-Cloud: Cloud Infrastructure for Tiny Edge Devices
Mordechai Guri
This paper introduces the Pico-Cloud, a micro-edge cloud architecture built on ultra-minimal hardware platforms such as the Raspberry Pi Zero and comparable single-board computers.…
On the Impossibility of a Perfect Hypervisor
Mordechai Guri
We establish a fundamental impossibility result for a `perfect hypervisor', one that (1) preserves every observable behavior of any program exactly as on bare metal and (2) adds ze…
SmartAttack: Air-Gap Attack via Smartwatches
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 bee…
Browser Fingerprinting Using WebAssembly
Mordechai Guri, Dor Fibert
Web client fingerprinting has become a widely used technique for uniquely identifying users, browsers, operating systems, and devices with high accuracy. While it is beneficial for…
PIXHELL: When Pixels Learn to Scream
Mordechai Guri
This paper presents a technique for generating sound by leveraging the electrical properties of liquid crystal displays (LCDs). The phenomenon occurs due to vibrational noise produ…