7 citations · 29 across the 20 of their papers we have counts for
23 papers
LAPRAD: LLM-Assisted PRotocol Attack Discovery
R. Can Aygun, Yehuda Afek, Anat Bremler-Barr +1
With the goal of improving the security of Internet protocols, we seek faster, semi-automatic methods to discover new vulnerabilities in protocols such as DNS, BGP, and others. To…
POPS: From History to Mitigation of DNS Cache Poisoning Attacks
Yehuda Afek, Harel Berger, Anat Bremler-Barr
We present a novel yet simple and comprehensive DNS cache POisoning Prevention System (POPS), designed to integrate as a module in Intrusion Prevention Systems (IPS). POPS addresse…
Decoupling DNS Update Timing from TTL Values
Yehuda Afek, Ariel Litmanovich
A relatively simple safety-belt mechanism for improving DNS system availability and efficiency is proposed here. While it may seem ambitious, a careful examination shows it is both…
Distributed Computing With the Cloud
Yehuda Afek, Gal Giladi, Boaz Patt-Shamir
We investigate the effect of omnipresent cloud storage on distributed computing. We specify a network model with links of prescribed bandwidth that connect standard processing node…
Holdout SGD: Byzantine Tolerant Federated Learning
Shahar Azulay, Lior Raz, Amir Globerson +2
This work presents a new distributed Byzantine tolerant federated learning algorithm, HoldOut SGD, for Stochastic Gradient Descent (SGD) optimization. HoldOut SGD uses the well kno…
NXNSAttack: Recursive DNS Inefficiencies and Vulnerabilities
Yehuda Afek, Anat Bremler-Barr, Lior Shafir
This paper exposes a new vulnerability and introduces a corresponding attack, the NoneXistent Name Server Attack (NXNSAttack), that disrupts and may paralyze the DNS system, making…