Web3 Wallet Security Fundamentals: A Linux Command Line Approach

A practical, hands-on module focused on Web3/Crypto wallet security, using only the Linux command-line utilities that students have learned in class(CSE365).

• Objective: Learn fundamental and advanced wallet security concepts by using core Linux commands to simulate real-world security failures and forensic analysis.
• Commands Used: cat, grep, diff, touch, tr, chmod, Pipelining, Shell Scripting with Conditionals (if/then/else), and Environment Variable usage.

Challenge Progression

1. Securing the Seed Phrase

• Core Concept: Cold Storage Simulation, File Permissions, Simple Obfuscation
• Key Commands Used: touch, cat, tr (Translating chars), chmod (Changing Permissions)

2. The Hot Wallet Exposure

• Core Concept: Environment Variable Attacks, Private Key Leakage
• Key Commands Used: grep (on Exported Variables)

3. Phishing Content Analysis

• Core Concept: Content Forensics, Identifying Subtle Fraud
• Key Commands Used: diff (comparing files), grep

4. API Key Log Forensics

• Core Concept: Multi-Stage Log Filtering, Data Pipelining
• Key Commands Used: grep (Pipelining/Grepping live output), Text Extraction

5. Basic Signature Validation

• Core Concept: Integrity Check Simulation, Scripting Logic
• Key Commands Used: Scripting with Conditionals (if/then/else), cat

It is recommended to have a solid understanding of the commands listed above to successfully complete this module.

This module was created by Jacob Blemaster.