Fraud Shield Against Credit Card Fraud

 

FRAUD SHIELD USING BIG DATA: ENHANCING SECURITY AND DETECTION




INTRODUCTION 

Fraud is the willful falsification of information or the misleading of others to gain an unfair or unlawful advantage. Fraud typically benefits the offender financially or personally at the expense of the victim. Financial transactions, online interactions, identity theft, insurance claims, and other scenarios and kinds of fraud are just a few examples.   
 

The risk of fraud is greater than ever in the linked world of today when organizations increasingly rely on digital platforms and online transactions. Cybercriminals continuously improve their methods for finding and exploiting holes in digital systems, costing organizations not just money but also harm to their reputations. Fraud Shield is a potent solution that can stop this rising threat. 



PROBLEM DEFINITION 

In today's digital landscape, where financial transactions are increasingly shifting to online platforms, the need for robust fraud detection systems has become paramount. This report introduces a comprehensive solution "Fraud Shield" that leverages the power of big data analytics to identify and prevent fraudulent transactions. By seamlessly integrating cutting-edge technologies, Fraud Shield aims to provide financial institutions with a reliable and efficient tool to safeguard their customers' assets. 

The goal of this project is to detect, identify and stop fraudulent actions. A system, organization, or transaction may be the subject of fraudTo detect fraud, various approaches, technologies, and procedures were used. Analysis for fraud detection's main goals is: 

  

1. Early Detection and Prevention: The major purpose of the fraud Shield analysis is to identify fraudulent actions as early as possible to limit the potential harm and financial losses. 

2. Reduce Financial Losses: Fraudulent activity can result in substantial financial losses for people, companies, and organizations. The fraud shield analysis aims to identify and halt fraudulent transactions or acts before they do significant harm, thereby reducing these losses. 

3. Protect Reputation: The Fraud Shield analysis aims to protect individuals, clients and organizations from Fraudulent acts that can harm their reputation. 

4. Compliance and Regulation: The fraud shield aims to embrace legal standards for preventing fraud in many businesses  

Additionally, the goal of the Fraud Shield study is to support the identification of problems with data security, the safeguarding of sensitive data, improved operational effectiveness, adaptability, and learning. 

THE DIGITAL ENVIRONMENT OF FRAUD 

Fraud may take many different forms, including account takeovers, phishing scams, and payment fraud. The risk of being a victim of these malevolent acts exists for both individuals and businesses of all sizes. As technology develops, fraudsters discover new methods to abuse digital channels, necessitating the adoption of effective defences by businesses. 




WHAT IS FRAUD SHIELD 

Fraud Shield is a state-of-the-art security system created to protect enterprises from a variety of fraudulent practices. It makes use of cutting-edge technology, AI, and data analytics to offer thorough security that goes beyond conventional security measures. 

Fraud Shield's main characteristics and advantages: 

  • Real-time surveillance 

Real-time monitoring of transactions, user activity, and system operations is done by Fraud Shield. It employs machine learning algorithms to find unusual patterns and actions that could be signs of fraud. 

  • Behaviour Analysis 

Fraud Shield can differentiate between authentic users and prospective fraudsters by examining user activity. It creates profiles of regular user behaviour so it can identify any differences that would indicate fraudulent activity. 

  • Transaction Verification 

Every transaction is carefully examined for discrepancies or unusual patterns. Fraud Shield might demand further verification procedures if a transaction raises suspicions to confirm its legality. 

  • Automated Response 

In the event of a suspected fraud attempt, Fraud Shield can initiate automated responses, such as sending messages to the user of a suspicious transaction and temporarily blocking a user's account or halting a suspicious transaction, preventing potential losses before they occur. 

FRAUD SHIELD: HOW WAS IT BUILT?

Fraud Shield was created to meet a wide range of requirements.


DESIGN SPECIFICATIONS 

INTERFACE REQUIREMENTS 

  1. Hardware Specifications 

The following hardware requirements are utilized to assess the Fraud Shield effectively: 

  • Intel Core i7 Processor 
  • 8 GB RAM or higher 
  • Color SVGA Monitor 
  • 500 GB Hard Disk space 
  • Mouse 
  • Keyboard 


2. Software Technologies 

 Fraud Shield utilized a stack of advanced technologies to deliver optimal performance and accuracy: 

  • Frontend: HTML5, JavaScript, CSS3. 

  • Data Store: HDFS 3.x, Apache Spark 3.x. 

  • Backend: Impala 4.x or higher for efficient querying of data. 

  • Programming: Python 3.x/R 4.x (or higher) for implementing algorithms and data analysis. 

  • Visualization: Tableau Desktop 2023.2 for creating meaningful visualizations. 

  

 

 LINK OF PUBLISHED BLOG  

 

LINK OF GITHUB FOR ACCESSING THE UPLOADED PROJECT CODE  

 

TABLEAU DASHBOARD WITH APPROPRIATE ACCESS RIGHTS OR PERMISSION TO ACCESS FOR TESTING 

FUNCTIONAL REQUIREMENTS 

All functional requirements were adhered to. 

  1. Load Data: The application loads data into the Hadoop cluster, making it ready for analysis. 

  1. Modeling Strategies: Employing supervised learning methods. Supervised learning is used when the target variable is known. 

  1. Big Data Techniques: Utilize the power of Hadoop to process vast unstructured datasets across clusters. Analyze credit card transactions using MapReduce logic in HDFS for efficient data analysis and rapid response. 

  1. Train, Validate, and Test: Develop models using training, validation, and test sets. This ensures the model learns generalized patterns and performs well on unseen data. 

  1. Analyze Results: Employ various evaluation diagnostics, such as gain, lift, and confusion matrices, to assess model performance. Business domain knowledge plays a crucial role in interpreting model results. 

  1. Implement Results: Assess clustering models based on overall performance or specific data groupings. 

  1. Functionalities: Fraud Shield offers user notifications through email or SMS for fraudulent transactions, data visualization for easy comprehension, and confirmation messages for legitimate transactions. 

 

 
NON-FUNCTIONAL REQUIREMENTS 

1. Performance: The application efficiently processes large volumes of data in real-time, handling complex algorithms and analytics within acceptable response times. 

2. Scalability: Designed to handle growing data volumes and computational demands, the application can scale horizontally across nodes or clusters. 

3. Security: Robust security measures protect sensitive credit card and customer information, ensuring secure data transmission, encryption, access controls, and compliance with regulations. 

4. Usability: Fraud Shield offers a user-friendly interface with intuitive visualizations, providing meaningful insights for effective decision-making and fraud investigation. 

5. Reliability: The application ensures high reliability through fault tolerance mechanisms, data replication, backup, recovery procedures, and automated monitoring. 

 

USER JOURNEY MAP 


 

  



 

SOURCE CODE 

All source codes can be gotten from the Git Hub repository:  

 

PURPOSE AND SCOPE 

This article provides a comprehensive introduction to "Fraud Shield" a sophisticated fraud detection tool.   

 

PROJECT SCOPE  

Accurately identifying possibly fraudulent credit card transactions is Risk Sentinel's main objective. The tool recognizes trends, abnormalities, and signs of fraudulent conduct in real-time by utilizing big data analytics and sophisticated algorithms. It is essential for minimizing losses by quickly identifying fraudulent activity. 

  

CONSTRAINTS 

  • Resource Limitations: Inadequate resources can hinder the application's efficiency and performance. 
  • Infrastructure Challenges: Infrastructure limitations might affect the application's ability to handle data volumes and process transactions effectively. 
  • Scalability Issues: As the application scales, challenges related to computational demands and data handling may arise. 

 

TEST DATA USED IN THE PROJECT 
DATA ACQUISITION 

The dataset was gotten from Kaggle. Risk Sentinel utilizes the Kaggle Credit Card Fraud Detection dataset, which contains numeric values instead of raw data due to privacy concerns. This dataset reflects real-world data imbalance, where fraud cases constitute only a small fraction of transactions. 

  

 

LEARNING TYPE 

For its forecasting models, Risk Sentinel uses supervised learning techniques. A model is trained through supervised learning using labelled data to make predictions about the connections between independent and dependent variables. supervised learning methods include forecasting, regression, and classification. 

  

   

HANDLING DATA IMBALANCE 

Risk Sentinel addresses the issue of imbalanced class distribution within the dataset. Approaches such as oversampling (SMOTE), under sampling, anomaly detection (isolation forest, autoencoders), and evaluation metrics are utilized to enhance model performance on minority classes. 

  

PROJECT INSTALLATION INSTRUCTIONS FOR CONFIGURING TABLEAU, BIG DATA TECHNOLOGIES, AND UI CODE 

  • Tableau 

Risk Sentinel integrates Tableau Desktop 2023.2 for data visualization. Tableau provides a user-friendly interface for creating insightful visualizations that aid decision-making and fraud investigation. 

  • Hadoop 

Risk Sentinel's implementation involves several steps for setting up Hadoop. The installation process can be complex and vary depending on the environment. Below is a general guide to getting started on the Windows platform: 

1. PrerequisitesEnsure Java (preferably version 8 or later) and SSH are installed and configured for inter-node communication. 

2. Download and Extract: Download the latest stable version of Hadoop from the

Apache Hadoop website. Extract the package to a suitable location. Go to the Apache Hadoop website (https://hadoop.apache.org/) and download the latest stable version of Hadoop. 

3. Configuration: Configure Hadoop by modifying various configuration files in the

`etc/Hadoop` directory. Update settings like `JAVA_HOME`, core-site.xml, hdfs-site.xml, mapred-site.xml, and yarn-site.xml as required. 

 


4. Format HDFS: Before starting Hadoop services, format the HDFS using the command `Hadoop namenode -format`. 

5. Start Services: Start HDFS and YARN services using `start-dfs.sh` and `start-yarn.sh` respectively. 

6. Testing: Test Hadoop by creating directories, uploading files, listing files, and reading file contents using HDFS commands. 

7. Stop Services: Stop Hadoop services using `stop-yarn.sh` and `stop-dfs.sh` when testing is complete. 

 

UI INSTALLATION 

HTML, CSS, JAVA, and Bootstrap were used to write the UI coding. 

All the codes are available at: https://github.com/chikuniepraise/Fraud_Shield/ 

 

 

 

 

 

Snippets of Codes from JAVA, CSS, Bootstrap and HTML 

 
DATABASE DESIGN 

Hadoop: 

For the database design, there are some prerequisites to installing Hadoop. 

  • Java Development Kit (JDK) installed (Hadoop requires Java). 

  • SSH configured for password less communication between nodes for setting up the Hadoop cluster. 

The Java Development Kit 8 was set up, and Hadoop was downloaded and unzipped. 

 

 

 Configuration setting of the Hadoop’s local host. 

 

Configuration of the SSH nodes for setting up Hadoop Cluster.  

 

 

An Overview that the Hadoop is active 

 

Python: 

The code was divided into two main sections:  

  1. The Creation, Training, and Evaluation of RandomForestClassifier Model and  
  2. Loading the Model and Making Predictions. 

  •  RandomForestClassifier Model Development, Training, and Evaluation 


The necessary PySpark libraries are imported, using pip install pyzipcode, sklearn, pandas, flask for python installation and pyspark along with tools for setting up a Spark session, building pipelines, classifying data with a RandomForestClassifier, assessing model performance, and utilizing DataFrame capabilities.  

The code starts a Spark session called "creditcard" and reads a CSV file called "creditcard.csv" that contains information about credit card transactions. The dataset was read, cleaned, and analyzed. By eliminating rows with incomplete data using the "dropna" function, missing values in specified columns (such as "Time," "V1 through "V28," "Amount," and "Class") are handled. 

  

To solve data imbalance, the code distinguishes fraudulent ('Class' == 1) from non-fraudulent ('Class' == 0) transactions. A balanced dataset is produced by undersampling non-fraudulent transactions to match the number of fraudulent ones. The union operation then merges these two datasets. 

The dataset's predictive potential is increased by feature engineering. 'MeanV' computes the mean of a subset of PCA features ('V1' through 'V28'), whereas 'SumV' computes their sum. Transaction amounts are categorized by "AmountCategory" using preset bins. 'StdDev' and 'Variance' are obtained from the chosen PCA features. 

 

 

Importing Libraries and Feature Engineering 

Training and testing sets comprise 70% and 30%, respectively, of the dataset. 'Class' is used as the label column in a RandomForestClassifier model, and engineered features are used as the features column. Predictions are produced for the test data once the model has been trained using the training data. Based on these forecasts, the MulticlassClassificationEvaluator calculates accuracy, giving the model a performance score. 

 

 

Model Evaluation and Accuracy 

 

The saving of the model is handled by this code. A previously stored model is checked for existence. If so, the correctness of the current model is assessed. If the current model's accuracy outperforms the prior one, the current model is kept and takes the place of the earlier model. The best-performing model is kept using this iterative process. 

 

  1. Utilizing the Model to Make Predictions. 

The 'PipelineModel.load' function loads the pre-trained model, allowing predictions to be made using the stored model. fresh data were produced to make predictions. Using a dictionary, a synthetic dataset that resembles credit card transaction data is produced.   

New features ('MeanV', 'SumV', 'AmountCategory', 'StdDev', and 'Variance') are produced for the synthetic dataset based on chosen PCA features, like feature engineering during model training.   

The engineering characteristics are transformed into a vector representation appropriate for model input using the 'VectorAssembler'.  

The pre-trained model is used to forecast results using the fresh data. The 'transform' technique of the loaded model is used to provide predictions. The projected result is then presented after being taken from the Data Frame.  

 

Model Prediction 

Tableau: 

Tableau Desktop 2023.2 was integrated for data visualization. Tableau provides a user-friendly interface for creating insightful visualizations that aid decision-making and fraud investigation. 

Step 1: The Dataset was downloaded from Kaggle using the link: Credit Card Fraud Detection | Kaggle 

Step 2: The dataset was imported to tableau as a text file 

Step 3: The dataset was Cleaned. 

  • Each column's data types in Tableau were examined to ensure that they were appropriate (for example, numeric vs. text). 

  • The data interpreter was used to clean the data 

  • Data that was missing or inconsistent was examined for and cleansed, where necessary. 

  • Identified the key fields - Time, Amount, V1-V28, Class. 

 

 

 

Cleaning the dataset on Tableau 

 

Step 4: Analyze the data 

  • Create basic summary stats for numeric fields: averages, min, max, etc. 

  • Check distribution of key fields like Class and Amount using histograms or frequency tables. 

  • Identify any trends or patterns over Time. Create line chart with Time on x-axis. 

  • Find correlations between fields using scatter plots and reference lines. Compare Amount vs Class for example. 

  • Cluster data using clustering algorithm to find similarities between records. 

 

 

Creating calculated fields for mean in Tableau 

 

Segregating the class to fraudulent and non-fraudulent transaction 

 

Step 5Visualize findings 

  • Dashboards with visualizations was built like bar charts, scatter plots to share insights. 

  • All charts have been formatted correctly, with the necessary axis labels, colors, and titles. 

  • Filters were added to allow good interaction with the data. 

 

 

Time relationship between the fraudulent and non-fraudulent transactions 

 

 

The mean transaction and max time of fraudulent and non-fraudulent transactions. 

 

 

 

 A dashboard on Tableau showing visualizations of the data. 


FRAUD SHIELD UTILIZES CSS, HADOOP AND BIG DATA, IMPALA, PYTHON AND TABLEAU

Using Big Data and Hadoop to Detect and Protect Against Advanced Fraud

Individuals and Businesses now confront a constantly changing fraud threat scenario in a world defined by digital interconnection. The way fraud detection and prevention is been handled has been completely transformed by the introduction of big data technologies like Hadoop.  Fraud Shield uses Big Data and Hadoop to improve the effectiveness of fraud detection systems.


The sophistication of fraudsters is rising, and complex strategies are used that are difficult to detect using conventional fraud detection Real-time monitoring, pattern identification, and adaptive responses to keep up with these malevolent actorse crucial. Big data and Hadoop are useful in this situation.



Hadoop and Big Data

Hadoop is an open-source framework created to handle and store enormous volumes of data across distributed computer clusters. Hadoop Distributed File System (HDFS) for data storage and MapReduce for data processing make up its two primary parts. Along with Hadoop, big data refers to a variety of technologies that allow businesses to collect, store, process, and analyze enormous information to gain insightful knowledge.


Benefits of Big Data and Hadoop in Fraud Detection

  • Scalability 

Real-time processing of vast volumes of data is required for fraud detection. Due to Hadoop's capacity for horizontal growth, the system can sustain the strain as data volume increases without experiencing any speed degradation.

  • Real-time analytics

Hadoop's architecture makes it possible to analyze data in real time, allowing for quick analysis of incoming data streams. This is essential for quickly identifying and counteracting fraudulent actions.


  • Pattern Identification

Datasets containing complex patterns and anomalies that signal fraudulent activity can be found using big data analytics. Vast volumes of data may be processed and analyzed using Hadoop to find hidden correlations and trends that conventional approaches might overlook.


  • Machine Learning Integration

Hadoop's adaptability makes it simple to include machine learning techniques. On the basis of past data, machine learning models may be trained to identify new fraud types, evolving over time to counter growing risks.


Big data solutions can include many data sources, such as social media, outside databases, and old transaction records, to enrich the data. This enhanced data aids in the creation of thorough user profiles and raises the reliability of fraud detection.

Visualization

After the integration and analysis of data by Python, Visualization is done by Tableau dashboard. 


Fraud Shield Implementation

  • Data collection involves gathering information from a variety of sources and storing it in a Hadoop cluster.

    • Data cleaning and preprocessing: Remove noise and unimportant information from the data. In order to identify fraud accurately, data quality is essential.

    • Analyze incoming data streams in real-time by utilizing Hadoop's real-time processing capabilities. Find trends, abnormalities, and departures from typical behaviour.

    • Training machine learning models using historical data will help you spot fraudulent trends. Use these models to generate predictions based on fresh data.

    • Adaptive Reactions: Initiate adaptive reactions, such as notifications, temporary account freezes, or extra authentication processes, when suspicious behavior is discovered

Staying ahead in the fight against fraud necessitates novel strategies. Businesses can identify complex trends and quickly adjust to new threats thanks to the powerful combination provided by Fraud Shield. In order to safeguard the financial stability and reputation of your company, Fraud Shield offers a comprehensive solution that combines technology, data analysis, and real-time monitoring. Businesses may prosper in the digital age in a safe manner by using Fraud Shield, which makes sure that every transaction and contact is reliable and fraud-free.



VIDEO ON FRAUD SHIELD 

FRAUD SHIELD


Summary 

Hadoop, Big Data, and Tableau are used by Fraud Shield to improve fraud detection and visualization. It is a complex solution that uses Tableau visualization, Big Data analytics, and Hadoop to fight fraud in a variety of sectors. Organizations can efficiently identify, stop, and illustrate fraud tendencies in huge and complex databases by combining these tools.  

 

To analyze and store enormous amounts of data across clusters of cheap hardware, Hadoop is a distributed computing platform. This framework is used by big data analytics to manage the massive datasets produced by the current digital environment.  Data from many sources, such as transaction logs, user actions, and history records, are combined by Fraud Shield. Large datasets may be effectively stored and managed by the Hadoop system thanks to HDFS (Hadoop Distributed File System). 

  

Data processing in parallel is made possible by Hadoop's MapReduce programming architecture, which makes it perfect for the sophisticated analytics needed for fraud detection. The use of algorithms reveals anomalies, trends, and suspicious behaviors, which are used to identify fraud tendencies. Its distributed architecture guarantees that the system can extend horizontally to meet the constantly expanding data volume, maintaining good performance even with petabytes of data.  

  

Advanced analytics driven by Hadoop are used by Fraud Shield to find probable fraud signs. It reveals hidden patterns, correlations, and anomalies that can point to fraudulent activity through the analysis of enormous databases. Its machine learning algorithms create models that take lessons from previous fraud incidents, making it possible to detect and warn possibly fraudulent transactions in real-time.  

  

Fraud Shield tracks user behavior over time to look for changes from typical patterns and suspicious activity. 

  

Tableau develops interactive dashboards that provide real-time insights into fraud detection indicators, enabling businesses to monitor possible threats and act quickly. It is simpler to interpret the data and find possible fraud sources when anomalies and trends are shown using charts and graphs.  

  

Utilizing the combined strength of these technologies, Fraud Shield allows earlier detection of suspicious activity and more precise fraud pattern identification. With the use of real-time analytics, possible fraud instances are swiftly identified and investigated, preventing further financial losses.  

 

In today's data-driven world, integrating cutting-edge technologies may result in a holistic solution for fraud detection, prevention, and visualization. Fraud Shield's combination of Hadoop, Big Data analytics, and Tableau serves as an example of this. Because of its design, which can scale to handle expanding datasets, fraud prevention will remain successful over time. 

 




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