Search Results for author: Najeeb Moharram Jebreel

Found 3 papers, 2 papers with code

Defending Against Backdoor Attacks by Layer-wise Feature Analysis

1 code implementation24 Feb 2023 Najeeb Moharram Jebreel, Josep Domingo-Ferrer, Yiming Li

We find out that the feature difference between benign and poisoned samples tends to be maximum at a critical layer, which is not always the one typically used in existing defenses, namely the layer before fully-connected layers.

Backdoor Attack

Enhanced Security and Privacy via Fragmented Federated Learning

1 code implementation13 Jul 2022 Najeeb Moharram Jebreel, Josep Domingo-Ferrer, Alberto Blanco-Justicia, David Sanchez

To tackle the accuracy-privacy-security conflict, we propose {\em fragmented federated learning} (FFL), in which participants randomly exchange and mix fragments of their updates before sending them to the server.

Federated Learning

Defending against the Label-flipping Attack in Federated Learning

no code implementations5 Jul 2022 Najeeb Moharram Jebreel, Josep Domingo-Ferrer, David Sánchez, Alberto Blanco-Justicia

The label-flipping (LF) attack is a targeted poisoning attack where the attackers poison their training data by flipping the labels of some examples from one class (i. e., the source class) to another (i. e., the target class).

Federated Learning

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