Search Results for author: Lukas Graner

Found 9 papers, 3 papers with code

Authorship Verification based on the Likelihood Ratio of Grammar Models

no code implementations13 Mar 2024 Andrea Nini, Oren Halvani, Lukas Graner, Valerio Gherardi, Shunichi Ishihara

Existing state-of-the-art AV methods use computational solutions that are not supported by a plausible scientific explanation for their functioning and that are often difficult for analysts to interpret.

Authorship Verification

Face Pasting Attack

1 code implementation17 Oct 2022 Niklas Bunzel, Lukas Graner

For an attack to be considered successful the target class has to have the highest confidence among all classes and the stealthiness has to be at least 0. 5.

Face Recognition Position

TAVeer: An Interpretable Topic-Agnostic Authorship Verification Method

no code implementations1 Aug 2020 Oren Halvani, Lukas Graner, Roey Regev

A central problem that has been researched for many years in the field of digital text forensics is the question whether two documents were written by the same author.

Authorship Verification

A Step Towards Interpretable Authorship Verification

no code implementations22 Jun 2020 Oren Halvani, Lukas Graner, Roey Regev

A central problem that has been researched for many years in the field of digital text forensics is the question whether two documents were written by the same author.

Authorship Verification

POSNoise: An Effective Countermeasure Against Topic Biases in Authorship Analysis

no code implementations2 May 2020 Oren Halvani, Lukas Graner

In recent years, a variety of AV methods have been proposed that focus on this problem and can be divided into two categories: The first category refers to such methods that are based on explicitly defined features, where one has full control over which features are considered and what they actually represent.

Authorship Verification

Assessing the Applicability of Authorship Verification Methods

no code implementations24 Jun 2019 Oren Halvani, Christian Winter, Lukas Graner

Our results indicate that part of the methods are able to cope with very challenging verification cases such as 250 characters long informal chat conversations (72. 7% accuracy) or cases in which two scientific documents were written at different times with an average difference of 15. 6 years (> 75% accuracy).

Authorship Verification

Unary and Binary Classification Approaches and their Implications for Authorship Verification

no code implementations31 Dec 2018 Oren Halvani, Christian Winter, Lukas Graner

Even though AV represents a unary classification problem, a number of existing approaches consider it as a binary classification task.

Authorship Verification Binary Classification +4

Authorship verification in the absence of explicit features and thresholds

1 code implementation1 Mar 2018 Oren Halvani, Lukas Graner, Inna Vogel

Moreover, many existing AV methods are based on explicit thresholds (needed to accept or reject a stated authorship), which are determined on training corpora.

Authorship Verification Information Retrieval +2

Authorship Verification based on Compression-Models

1 code implementation1 Jun 2017 Oren Halvani, Christian Winter, Lukas Graner

Instead, the only three key components of our method are a compressing algorithm, a dissimilarity measure and a threshold, needed to accept or reject the authorship of the questioned document.

Authorship Verification Text Classification +1

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