Search results for "phishing"

Hits ?▲	Authors	Title	Venue	Year	Link
12	Chandra Thapa, Jun Wen Tang, Alsharif Abuadbba, Yansong Gao, Seyit Camtepe, Surya Nepal, Mahathir Almashor, Yifeng Zheng	Evaluation of Federated Learning in Phishing Email Detection.	Sensors	2023	DBLP DOI BibTeX RDF
12	Naya Nagy, Malak Saleh Aljabri, Afrah Shaahid, Amnah Albin Ahmed, Fatima Alnasser, Linda Almakramy, Manar Alhadab, Shahad Alfaddagh	Phishing URLs Detection Using Sequential and Parallel ML Techniques: Comparative Analysis.	Sensors	2023	DBLP DOI BibTeX RDF
12	Kunj Joshi, Chintan M. Bhatt, Kaushal Shah, Dwireph Parmar, Juan M. Corchado, Alessandro Bruno, Pier Luigi Mazzeo	Machine-Learning Techniques for Predicting Phishing Attacks in Blockchain Networks: A Comparative Study.	Algorithms	2023	DBLP DOI BibTeX RDF
12	Akanksha S. Mahajan, Pradnya K. Navale, Vaishnavi V. Patil, Vijay M. Khadse, Parikshit N. Mahalle	The hybrid framework of ensemble technique in machine learning for phishing detection.	Int. J. Inf. Comput. Secur.	2023	DBLP DOI BibTeX RDF
12	Munish Kumar, Cheemaladinne Kondaiah, Alwyn Roshan Pais, Routhu Srinivasa Rao	Machine learning models for phishing detection from TLS traffic.	Clust. Comput.	2023	DBLP DOI BibTeX RDF
12	Shahryar Baki, Rakesh M. Verma	Sixteen Years of Phishing User Studies: What Have We Learned?	IEEE Trans. Dependable Secur. Comput.	2023	DBLP DOI BibTeX RDF
12	Giovanni Apruzzese, V. S. Subrahmanian	Mitigating Adversarial Gray-Box Attacks Against Phishing Detectors.	IEEE Trans. Dependable Secur. Comput.	2023	DBLP DOI BibTeX RDF
12	Hamed Qahri-Saremi, Ofir Turel	Situational Contingencies in Susceptibility of Social Media to Phishing: A Temptation and Restraint Model.	J. Manag. Inf. Syst.	2023	DBLP BibTeX RDF
12	Jonas Tzschoppe, Hans Löhr	Browser-in-the-Middle - Evaluation of a modern approach to phishing.	EuroSec@EUROSYS	2023	DBLP DOI BibTeX RDF
12	Lucas Torrealba Aravena, Pedro Casas, Javier Bustos-Jiménez, Germán Capdehourat, M. Findrik	Phish Me If You Can - Lexicographic Analysis and Machine Learning for Phishing Websites Detection with PHISHWEB.	NetSoft	2023	DBLP DOI BibTeX RDF
12	Hadi El Karhani, Riad Al Jamal, Yorgo Bou Samra, Imad H. Elhajj, Ayman I. Kayssi	Phishing and Smishing Detection Using Machine Learning.	CSR	2023	DBLP DOI BibTeX RDF
12	Milita Songailaite, Egle Kankeviciute, Bohdan Zhyhun, Justina Mandravickaite	BERT-Based Models for Phishing Detection.	IVUS	2023	DBLP BibTeX RDF
12	Biagio Montaruli, Luca Demetrio, Maura Pintor, Luca Compagna, Davide Balzarotti, Battista Biggio	Raze to the Ground: Query-Efficient Adversarial HTML Attacks on Machine-Learning Phishing Webpage Detectors.	AISec@CCS	2023	DBLP DOI BibTeX RDF
12	Changqing Miao, Jianan Feng, Wei You, Wenchang Shi, Jianjun Huang 0001, Bin Liang 0002	A Good Fishman Knows All the Angles: A Critical Evaluation of Google's Phishing Page Classifier.	CCS	2023	DBLP DOI BibTeX RDF
12	Bowen He, Yuan Chen, Zhuo Chen, Xiaohui Hu, Yufeng Hu, Lei Wu 0012, Rui Chang, Haoyu Wang 0001, Yajin Zhou	TxPhishScope: Towards Detecting and Understanding Transaction-based Phishing on Ethereum.	CCS	2023	DBLP DOI BibTeX RDF
12	Alexander Veach, Munther Abualkibash	Detecting Phishing Websites Based on Machine Learning Techniques.	ACR	2023	DBLP DOI BibTeX RDF
12	Jan Bayer, Sourena Maroofi, Olivier Hureau, Andrzej Duda, Maciej Korczynski	Building a Resilient Domain Whitelist to Enhance Phishing Blacklist Accuracy.	eCrime	2023	DBLP DOI BibTeX RDF
12	Ajka Draganovic, Savino Dambra, Javier Aldana-Iuit, Kevin Alejandro Roundy, Giovanni Apruzzese	"Do Users Fall for Real Adversarial Phishing?" Investigating the Human Response to Evasive Webpages.	eCrime	2023	DBLP DOI BibTeX RDF
12	Jean Emmanuel Ntsama, Claude Fachkha, Philippe Brice Owomo, Adrian Chickagwe Focho	A Gamification Architecture to Enhance Phishing Awareness.	SAFER-TEA	2023	DBLP DOI BibTeX RDF
12	Jiaqi Dong, Zishu Qin, Zhou Fang, Xuan Chen, Zengfeng Huang, Haoyun Guo, Richen Liu, Cagatay Turkay, Siming Chen 0001	Visual Analytics for Phishing Scam Identification in Blockchain Transactions with Multiple Model Comparison.	VINCI	2023	DBLP DOI BibTeX RDF
12	Koko Nishiura, Tomotaka Kimura, Jun Cheng 0001	Countermeasure against Backdoor Attack for Deep Learning-Based Phishing Detection.	ICCE-Taiwan	2023	DBLP DOI BibTeX RDF
12	Asif Uz Zaman Asif, Hossein Shirazi, Indrakshi Ray	Machine Learning-Based Phishing Detection Using URL Features: A Comprehensive Review.	SSS	2023	DBLP DOI BibTeX RDF
12	Belyse Rugangazi, George Okeyo	Detecting Phishing Attacks Using Feature Importance-Based Machine Learning Approach.	AFRICON	2023	DBLP DOI BibTeX RDF
12	Parisa Mehdi Gholampour, Rakesh M. Verma	Adversarial Robustness of Phishing Email Detection Models.	IWSPA@CODASPY	2023	DBLP DOI BibTeX RDF
12	Minh Vo Quang, Dang Bui Tan Hai, Ngan Tran Kim Ngoc, Son Ngo Duc Hoang, Quyen Nguyen Huu, Duy Phan The, Van-Hau Pham	Shark-Eyes: A multimodal fusion framework for multi-view-based phishing website detection.	SoICT	2023	DBLP DOI BibTeX RDF
12	Rufai Ahmad, Sotirios Terzis, Karen Renaud	Content Analysis of Persuasion Principles in Mobile Instant Message Phishing.	HAISA	2023	DBLP DOI BibTeX RDF
12	Daniel G. Conway, Marcus A. Butavicius, Kun Yu, Fang Chen 0001	Are People with Cyber Security Training Worse at Checking Phishing Email Addresses? Testing the Automaticity of Verifying the Sender's Address.	HAISA	2023	DBLP DOI BibTeX RDF
12	Rufai Ahmad, Sotirios Terzis, Karen Renaud	Investigating Mobile Instant Messaging Phishing: A Study into User Awareness and Preventive Measures.	HCI (35)	2023	DBLP DOI BibTeX RDF
12	Nils Begou, Jeremy Vinoy, Andrzej Duda, Maciej Korczynski	Exploring the Dark Side of AI: Advanced Phishing Attack Design and Deployment Using ChatGPT.	CNS	2023	DBLP DOI BibTeX RDF
12	Robert Lamprecht, Franziska Haid, Andreas Eckhardt	Security Networks as an Effective Means to Reduce Spear Phishing Susceptibility.	AMCIS	2023	DBLP BibTeX RDF
12	Benjamin Ampel, Yang Gao, James Lee Hu, Sagar Samtani, Hsinchun Chen	Benchmarking the Robustness of Phishing Email Detection Systems.	AMCIS	2023	DBLP BibTeX RDF
12	Wei Xie, Lakshmi Iyer	Phishing Susceptibility - a Cognitive Dissonance Persuasion View.	AMCIS	2023	DBLP BibTeX RDF
12	Yuki Ishida, Masaki Hanada, Atsushi Waseda, Moo Wan Kim	Analysis of DNS Graph of Phishing Websites Using Digital Certificates.	ICACT	2023	DBLP DOI BibTeX RDF
12	Akshat Gaurav, Brij B. Gupta, Varsha Arya, Kwok Tai Chui, Francisco José García-Peñalvo	Adaptive Defense Mechanisms Against Phishing Threats in 6G Wireless Environments.	VTC Fall	2023	DBLP DOI BibTeX RDF
12	Mingshun Ye, Mingdong Tang, Weili Chen	BILAM: A BiLSTM-Based Model for Detecting Phishing Scams in Ethereum.	ISPA/BDCloud/SocialCom/SustainCom	2023	DBLP DOI BibTeX RDF
12	Joakim Kävrestad, Muhammad Abbas Khan Abbasi, Márton Tarczal, Marcus Nohlberg	The impact of short-term memory on phishing detection ability and password behaviour.	STPIS	2023	DBLP BibTeX RDF
12	Shiyue Liu, Hua Wu 0004, Guang Cheng 0001, Xiaoyan Hu	Real-Time Phishing Detection Based on URL Multi-Perspective Features: Aiming at the Real Web Environment.	ICC	2023	DBLP DOI BibTeX RDF
12	Wesam Fadheel, Steve Carr 0001, Wassnaa Al-Mawee	On Phishing: Proposing a Traffic Behavior-Based Model to Detect, Prevent, and Classify Webpage Suspicious and Malicious Activities.	ICAIC	2023	DBLP DOI BibTeX RDF
12	Fehmi Jaafar, Darine Ameyed, Lavin Titare, Md Nematullah	IoT Phishing Detection Using Hybrid NLP and Machine Learning Models Enhanced with Contextual Embedding.	QRS Companion	2023	DBLP DOI BibTeX RDF
12	Vincent Drury, Jakob Drees, Ulrike Meyer	Easier in Reverse: Simplifying URL Reading for Phishing URLs via Reverse Domain Name Notation.	ARES	2023	DBLP DOI BibTeX RDF
12	Hiroki Nakano, Daiki Chiba 0001, Takashi Koide, Naoki Fukushi, Takeshi Yagi, Takeo Hariu, Katsunari Yoshioka, Tsutomu Matsumoto	Canary in Twitter Mine: Collecting Phishing Reports from Experts and Non-experts.	ARES	2023	DBLP DOI BibTeX RDF
12	Yu Sun, Guangqi Liu, Xiaohui Han, Wenbo Zuo, Weihua Liu	FusionNet: An Effective Network Phishing Website Detection Framework Based on Multi-Modal Fusion.	HPCC/DSS/SmartCity/DependSys	2023	DBLP DOI BibTeX RDF
12	Xikang Yang, Biyu Zhou, Xuehai Tang, Xiaodan Zhang, Jizhong Han, Songlin Hu	Translets: Toward Explainable Phishing Fraud Detection in Ethereum.	HPCC/DSS/SmartCity/DependSys	2023	DBLP DOI BibTeX RDF
12	Yanbin Wang, Weifan Zhu, Haitao Xu 0002, Zhan Qin, Kui Ren 0001, Wenrui Ma	A Large-Scale Pretrained Deep Model for Phishing URL Detection.	ICASSP	2023	DBLP DOI BibTeX RDF
12	Rydhampreet Singh Gindra, Kashish Goyal, Janvi Sethi, Chetna Kaushal	Phishing and Web Hacking: Examining the Vulnerabilities and Defenses in the Digital Age.	IC3I	2023	DBLP DOI BibTeX RDF
12	Abulfaz Hajizada, Sharmin Jahan	Feature Selections for Phishing URLs Detection Using Combination of Multiple Feature Selection Methods.	ICMLC	2023	DBLP DOI BibTeX RDF
12	Asal Hojjati, Jaap Ham	"I Know What They Are Trying...!" - The Influence of Awareness of Persuasive Strategy Usage on Phishing Email Recognition Accuracy.	PERSUASIVE (Adjunct)	2023	DBLP BibTeX RDF
12	Giovanni Graziano, Daniele Ucci, Federica Bisio, Luca Oneto	PhishVision: A Deep Learning Based Visual Brand Impersonation Detector for Identifying Phishing Attacks.	OL2A (1)	2023	DBLP DOI BibTeX RDF
12	Italo Jose da Silva Oliveira, Rodrigo F. Calhau, Giancarlo Guizzardi	Toward a phishing attack ontology.	ER (Companion)	2023	DBLP BibTeX RDF
12	Rene Roepke, Johannes Ballmann	Towards a Competitive Two-Player Anti-phishing Learning Game.	GALA	2023	DBLP DOI BibTeX RDF
12	Yong Jin, Masahiko Tomoishi, Nariyoshi Yamai	Trigger-based Blocking Mechanism for Access to Email-derived Phishing URLs with User Alert.	ICEIC	2023	DBLP DOI BibTeX RDF
12	Zhutian Lin, Xi Xiao, Guangwu Hu, Bin Zhang 0048, Qixu Liu, Xiapu Luo	Phish2vec: A Temporal and Heterogeneous Network Embedding Approach for Detecting Phishing Scams on Ethereum.	SECON	2023	DBLP DOI BibTeX RDF
12	Lina Brunken, Annalina Buckmann, Jonas Hielscher, M. Angela Sasse	"To Do This Properly, You Need More Resources": The Hidden Costs of Introducing Simulated Phishing Campaigns.	USENIX Security Symposium	2023	DBLP BibTeX RDF
12	Iskander Sánchez-Rola, Leyla Bilge, Davide Balzarotti, Armin Buescher, Petros Efstathopoulos	Rods with Laser Beams: Understanding Browser Fingerprinting on Phishing Pages.	USENIX Security Symposium	2023	DBLP BibTeX RDF
12	Ruofan Liu, Yun Lin 0001, Yifan Zhang, Penn Han Lee, Jin Song Dong	Knowledge Expansion and Counterfactual Interaction for Reference-Based Phishing Detection.	USENIX Security Symposium	2023	DBLP BibTeX RDF
12	Cristiana Constantinescu	Awareness on Spear Phishing Attacks using Novel TLD names in Research and Academic Field.	RoEduNet	2023	DBLP DOI BibTeX RDF
12	Andrei-Daniel Tudosi, Adrian Graur, Doru Gabriel Balan, Alin Dan Potorac	An Email Classification Framework for Phishing Detection in Virtualized Network Environments.	RoEduNet	2023	DBLP DOI BibTeX RDF
12	Denish Omondi Otieno, Akbar Siami Namin, Keith S. Jones	The Application of the BERT Transformer Model for Phishing Email Classification.	COMPSAC	2023	DBLP DOI BibTeX RDF
12	Shucheng Li, Runchuan Wang, Hao Wu, Sheng Zhong 0002, Fengyuan Xu	SIEGE: Self-Supervised Incremental Deep Graph Learning for Ethereum Phishing Scam Detection.	ACM Multimedia	2023	DBLP DOI BibTeX RDF
12	Jeongkeun Shin, Kathleen M. Carley, L. Richard Carley	Integrating Human Factors into Agent-Based Simulation for Dynamic Phishing Susceptibility.	SBP-BRiMS	2023	DBLP DOI BibTeX RDF
12	Yukiko Sawaya, Ayane Sano, Takamasa Isohara, Akira Yamada 0001, Ayako Komatsu	Does the Anchoring Effect Influence Individuals' Anti-phishing Behavior Intentions?	FPS (1)	2023	DBLP DOI BibTeX RDF
12	Alexander Kerr, Timo Hynninen	Towards Improving Online Security Awareness Skills with Phishing and Spoofing Labs.	MIPRO	2023	DBLP DOI BibTeX RDF
12	Ivan Dunder, Sanja Seljan, Marko Odak	Data Acquisition and Corpus Creation for Phishing Detection.	MIPRO	2023	DBLP DOI BibTeX RDF
12	Igor Tomicic	Social Engineering Aspects of Email Phishing: an Overview and Taxonomy.	MIPRO	2023	DBLP DOI BibTeX RDF
12	Yue Ma, Zhengwei Jiang, Jun Jiang, Kai Zhang, Zhiting Ling, Peian Yang	Phishsifter: An Enhanced Phishing Pages Detection Method Based on the Relevance of Content and Domain.	CSCWD	2023	DBLP DOI BibTeX RDF
12	Jiahao Hu, Mingpei Cao, Xizhe Zhang, Xiong Zhang, Yuesheng Zhu	Temporal Weighted Heterogeneous Multigraph Embedding for Ethereum Phishing Scams Detection.	CSCWD	2023	DBLP DOI BibTeX RDF
12	Ivan Skula, Michal Kvet	Domain Blacklist Efficacy for Phishing Web-page Detection Over an Extended Time Period.	FRUCT	2023	DBLP DOI BibTeX RDF
12	Jamal N. Al-Karaki, Amjad Gawanmeh, Claude Fachkha	Blockchain for Email Security: A Perspective on Existing and Potential Solutions for Phishing Attacks.	BCCA	2023	DBLP DOI BibTeX RDF
12	Yunfei Wang, Hao Wang, Xiaozhen Lu, Lu Zhou, Liang Liu 0006	Detecting Ethereum Phishing Scams with Temporal Motif Features of Subgraph.	ISCC	2023	DBLP DOI BibTeX RDF
12	Serhii Toliupa, Serhii Buchyk, Anastasiiya Shabanova, Oleksandr Buchyk	The Method for Determining the Degree of Suspiciousness of a Phishing Url.	IT&I Workshops	2023	DBLP BibTeX RDF
12	Benjamin McConnell, Daniel Del Monaco, Mahdieh Zabihimayvan, Fatemeh Abdollahzadeh, Samir Hamada	Phishing Attack Detection: An Improved Performance Through Ensemble Learning.	ICAISC (2)	2023	DBLP DOI BibTeX RDF
12	Maria Carla Calzarossa, Paolo Giudici, Rasha Zieni	Explainable Machine Learning for Bag of Words-Based Phishing Detection.	xAI (1)	2023	DBLP DOI BibTeX RDF
12	Pavlo Burda, Abdul Malek Altawekji, Luca Allodi, Nicola Zannone	The Peculiar Case of Tailored Phishing against SMEs: Detection and Collective DefenseMechanisms at a Small IT Company.	EuroS&P Workshops	2023	DBLP DOI BibTeX RDF
12	Antonio Ruggia, Andrea Possemato, Alessio Merlo, Dario Nisi, Simone Aonzo	Android, Notify Me When It Is Time To Go Phishing.	EuroS&P	2023	DBLP DOI BibTeX RDF
12	Verena Distler	The Influence of Context on Response to Spear-Phishing Attacks: an In-Situ Deception Study.	CHI	2023	DBLP DOI BibTeX RDF
12	Anne Clara Tally, Jacob Abbott, Ashley M. Bochner, Sanchari Das, Christena Nippert-Eng	Tips, Tricks, and Training: Supporting Anti-Phishing Awareness among Mid-Career Office Workers Based on Employees' Current Practices.	CHI	2023	DBLP DOI BibTeX RDF
12	Katharina Schiller, Florian Adamsky, Zinaida Benenson	Towards an Empirical Study to Determine the Effectiveness of Support Systems against E-Mail Phishing Attacks.	CHI Extended Abstracts	2023	DBLP DOI BibTeX RDF
12	Paolo Buono, Giuseppe Desolda, Francesco Greco, Antonio Piccinno	Let warnings interrupt the interaction and explain: designing and evaluating phishing email warnings.	CHI Extended Abstracts	2023	DBLP DOI BibTeX RDF
12	Ioana Andreea Marin, Pavlo Burda, Nicola Zannone, Luca Allodi	The Influence of Human Factors on the Intention to Report Phishing Emails.	CHI	2023	DBLP DOI BibTeX RDF
12	Qi Li, Mingyu Cheng	Spear-Phishing Detection Method Based on Few-Shot Learning.	APPT	2023	DBLP DOI BibTeX RDF
12	Vitaliy Tsyganok, Yaroslav Khrolenko, Iryna Domanetska, Olena Fedusenko, Julia Minaeva	Web Phishing Detection System Based on Artificial Neural Networks Technology.	IntSol	2023	DBLP BibTeX RDF
12	Francesco Pietrantonio, Alessio Botta, Giorgio Ventre, Luigi Gallo, Stefania Zinno, Laura Mancuso, Roberta Presta	Investigating Gaze Behavior in Phishing Email Identification.	TMA	2023	DBLP DOI BibTeX RDF
12	Shaoxuan Zhuo, Guang Li, Weigang Wu, Jing Bian	Detecting Ethereum Phishing Scams via Multi-transaction-view Graph Attention Network.	ICPADS	2023	DBLP DOI BibTeX RDF
12	Anupama Ray, Sai Sakunthala Guddanti, Anil Prabhakar	Improving phishing detection in Ethereum transaction network using Quantum Machine Learning.	QCE	2023	DBLP DOI BibTeX RDF
12	George Thomopoulos, Dimitrios P. Lyras, Christos Fidas	Methodologies and Ethical Considerations in Phishing Research: A Comprehensive Review.	CHI Greece	2023	DBLP DOI BibTeX RDF
12	Md. Abdullah Al Ahasan, Mengjun Hu, Nashid Shahriar	OFMCDM/IRF: A Phishing Website Detection Model based on Optimized Fuzzy Multi-Criteria Decision-Making and Improved Random Forest.	SVCC	2023	DBLP DOI BibTeX RDF
12	Denish Omondi Otieno, Faranak Abri, Akbar Siami Namin, Keith S. Jones	Detecting Phishing URLs using the BERT Transformer Model.	IEEE Big Data	2023	DBLP DOI BibTeX RDF
12	Basant Subba	A heterogeneous stacking ensemble-based security framework for detecting phishing attacks.	NCC	2023	DBLP DOI BibTeX RDF
12	Baoying Huang, Jieli Liu, Jiajing Wu, Quanzhong Li 0001, Dan Lin 0007	Ethereum Phishing Fraud Detection Based on Heterogeneous Transaction Subnets.	ISCAS	2023	DBLP DOI BibTeX RDF
12	Wenjia Yu, Yijun Xia, Jieli Liu, Jiajing Wu	Streaming phishing scam detection method on Ethereum.	ISCAS	2023	DBLP DOI BibTeX RDF
12	Md. Fazle Rabbi, Arifa I. Champa, Minhaz F. Zibran	Phishy? Detecting Phishing Emails Using ML and NLP.	SERA	2023	DBLP DOI BibTeX RDF
12	Francesco Greco, Giuseppe Desolda, Andrea Esposito 0002	Explaining Phishing Attacks: An XAI Approach to Enhance User Awareness and Trust.	ITASEC	2023	DBLP BibTeX RDF
12	Ning Xu, Jiluan Fan, Zikai Wen	Email Reading Behavior-Informed Machine Learning Model to Predict Phishing Susceptibility.	AIS&P (1)	2023	DBLP DOI BibTeX RDF
12	Orvila Sarker, Sherif Haggag, Asangi Jayatilaka, Chelsea Liu	Personalized Guidelines for Design, Implementation and Evaluation of Anti-Phishing Interventions.	ESEM	2023	DBLP DOI BibTeX RDF
12	Rafea. M. Almejrab, Omar M. Sallabi, Fawzi Faragg Bushaala, Abdelgader Bubaker Said Altajori, Abdelhafid Ali Mohamed	A Classification Model For Phishing Detection System Based On Machine Learning Algorithms.	ICSC	2023	DBLP DOI BibTeX RDF
12	Sharvari Patil, Narendra M. Shekokar	Analysis of Dataset balancing Techniques for Phishing Dataset.	ICCCNT	2023	DBLP DOI BibTeX RDF
12	Vyankatesh B. Wable, Pallavi Thakur	CheckPhish: Leveraging A Machine Learning Approach for Detecting Phishing Websites.	ICCCNT	2023	DBLP DOI BibTeX RDF
12	N. Prabhu, Senthil Kumar T, G. Jeyakumar 0001	A Comprehensive Study of Web Phishing Detection Using Machine and Deep Learning Architecture.	ICCCNT	2023	DBLP DOI BibTeX RDF
12	Preeti, Priti Sharma	A Detailed Analysis on Various Datasets using Machine learning and Deep Learning Techniques for Phishing URLs Detection.	ICCCNT	2023	DBLP DOI BibTeX RDF
12	Twana Mustafa, Murat Karabatak	Feature Selection for Phishing Website by Using Naive Bayes Classifier.	ISDFS	2023	DBLP DOI BibTeX RDF