IMS is Not That Secure on Your 5G/4G Phones
Mobicom '24 - IMS security measures on mobile devices lag behind advancements, leading to vulnerabilities like DoS, SMS spoofing, and covert communications, all validated in 5G/4G networks, with proposed standard-compliant remedies.
May 29, 2024
Taming the Insecurity of Cellular Emergency Services (9–1-1): From Vulnerabilities to Secure Designs
Cellular emergency services for anonymous users introduce vulnerabilities that allow free data, DoS, and denial of service attacks, validated in U.S. and Taiwan networks, with proposed standard-compliant remedies.
Mar 1, 2024
When Good Turns Evil: Encrypted 5G/4G Voice Calls Can Leak Your Identities
This study uncovers vulnerabilities in 5G/4G call optimization techniques that, despite encryption, can leak call state information, enabling side-channel attacks like Cross-domain Identity Linkage (CrossIL) with identity inference success rates of up to 98\%.
Oct 2, 2023
Handling Data Heterogeneity in Federated Learning via Knowledge Fusion
FedKF addresses model drift in federated learning by fusing global and local knowledge during training, improving performance and fairness through techniques like active–inactive model aggregation and data-free knowledge distillation.
Sep 27, 2023
Uncovering insecure designs of cellular emergency services (911)
Mobicom '22 - Cellular emergency services, especially for anonymous users, increase the attack surface, leading to vulnerabilities enabling free data usage, DoS, and denial of emergency services.
Oct 14, 2022