Author: Fan, Jiye
Title: Smart password brute forcing using deep neural networks
Advisors: Hu, Haibo (EIE)
Degree: M.Sc.
Year: 2022
Subject: Computer security
Machine learning
Neural networks (Computer science)
Hong Kong Polytechnic University -- Dissertations
Department: Department of Electronic and Information Engineering
Pages: 63 pages : color illustrations
Language: English
Abstract: This dissertation explores deep neural networks that can be used in password brute-forcing cracking. To reinforce past research works in the field of password brute-forcing, the dissertation designs a deep neural network model called PassBF. The first part of PassBF is based on the IWGAN model and trained on the first password dataset, whereas the second part adopts transfer learning to transfer the IWGAN model to a second password dataset. In the process of transfer learning, the generator model is fixed while the discriminator model is trained with the second dataset, the discriminator model is fixed while the generator model is trained with the second dataset. Through the three-phase training, the feature of the first dataset is transferred to the second one, and the deep neural network is able to distinguish passwords and generate passwords similar to the second dataset. Then through experiments, the dissertation explores the effect of the transfer learning rate as well as other training parameters of the deep neural network. Based on two popular password training datasets, namely, the Reddit Username dataset and the RockYou password dataset. The dissertation also compares the performance of the PassBF model with the PassGAN model, which is a deep neural network used for password brute-forcing, on some common password brute-forcing tools. The comparison result shows the passBF has sufficient potent in the password brute-forcing field.
Rights: All rights reserved
Access: restricted access

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