scholarly journals No Free Charge Theorem: A Covert Channel via USB Charging Cable on Mobile Devices

2017 ◽  
pp. 83-102 ◽  
Author(s):  
Riccardo Spolaor ◽  
Laila Abudahi ◽  
Veelasha Moonsamy ◽  
Mauro Conti ◽  
Radha Poovendran
Keyword(s):  
Mobile Devices ◽  
Covert Channel ◽  
Free Charge

Backscatter as a Covert Channel in Mobile Devices

2018 ◽  
Vol 22 (1) ◽  
pp. 31-34 ◽  
Author(s):  
Zhice Yang ◽  
Qianyi Huang ◽  
Qian Zhang
Keyword(s):  
Mobile Devices ◽  
Covert Channel

scholarly journals Power to peep-all: Inference Attacks by Malicious Batteries on Mobile Devices

2018 ◽  
Vol 2018 (4) ◽  
pp. 141-158 ◽  
Author(s):  
Pavel Lifshits ◽  
Roni Forte ◽  
Yedid Hoshen ◽  
Matt Halpern ◽  
Manuel Philipose ◽  
...  
Keyword(s):  
Mobile Devices ◽  
Sampling Rate ◽  
Information Leakage ◽  
Primary Sources ◽  
Covert Channel ◽  
Sensitive Information ◽  
Web Browser ◽  
Open World ◽  
Fine Grain ◽  
Remote Server

Abstract Mobile devices are equipped with increasingly smart batteries designed to provide responsiveness and extended lifetime. However, such smart batteries may present a threat to users’ privacy. We demonstrate that the phone’s power trace sampled from the battery at 1KHz holds enough information to recover a variety of sensitive information. We show techniques to infer characters typed on a touchscreen; to accurately recover browsing history in an open-world setup; and to reliably detect incoming calls, and the photo shots including their lighting conditions. Combined with a novel exfiltration technique that establishes a covert channel from the battery to a remote server via a web browser, these attacks turn the malicious battery into a stealthy surveillance device. We deconstruct the attack by analyzing its robustness to sampling rate and execution conditions. To find mitigations we identify the sources of the information leakage exploited by the attack. We discover that the GPU or DRAM power traces alone are sufficient to distinguish between different websites. However, the CPU and power-hungry peripherals such as a touchscreen are the primary sources of fine-grain information leakage. We consider and evaluate possible mitigation mechanisms, highlighting the challenges to defend against the attacks. In summary, our work shows the feasibility of the malicious battery and motivates further research into system and application-level defenses to fully mitigate this emerging threat.

Phishing in Mobile Devices: Survey and Prevention Mechanism

2012 ◽  
Vol 2 (3) ◽  
pp. 86-88
Author(s):  
Dr. Kuntal Patel ◽  
◽  
Prof. Parimal Patel
Keyword(s):  
Mobile Devices

Laser Engineering of Barrier Structures Based on Solid Solution ZnCdHgTe.

2002 ◽  
Vol 719 ◽  
Author(s):  
Galina Khlyap
Keyword(s):  
Room Temperature ◽  
Film Surface ◽  
Charge Carriers ◽  
Barrier Structure ◽  
Free Charge ◽  
Current Voltage ◽  
Capacitance Voltage ◽  
Laser Engineering ◽  
Charged Defects ◽  
Epilayer Surface

AbstractRoom-temperature electric investigations carried out in CO2-laser irradiated ZnCdHgTe epifilms revealed current-voltage and capacitance-voltage dependencies typical for the metal-semiconductor barrier structure. The epilayer surface studies had demonstrated that the cell-like relief has replaced the initial tessellated structure observed on the as-grown samples. The detailed numerical analysis of the experimental measurements and morphological investigations of the film surface showed that the boundaries of the cells formed under the laser irradiation are appeared as the regions of accumulation of derived charged defects of different type of conductivity supplying free charge carriers under the applied electric field.

Sign in / Sign up

Export Citation Format

Share Document