InfoSec 3001 — Information Security from the Offensive Perspective

Level 1 — Programming and the Computer’s Inner Workings

Step 41. Setting Up Python and Your First Code — The Day You Build Your Workbench

Step 41. Setting Up Python and Your First Code — The Day You Build Your Workbench Level 1 — Programming and the Computer’s Inner Workings | Difficulty ★★☆☆☆ | Estimated time: 3…
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Step 42. Data Types in Depth — Four Baskets for Holding Values

Step 42. Data Types in Depth — Four Baskets for Holding Values Level 1 — Programming and the Computer’s Inner Workings | Difficulty ★★☆☆☆ | Estimated time: 3 hours Prerequisites: Step 41…
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Step 43. Conditionals and Loops — Code That Decides and Repeats

Step 43. Conditionals and Loops — Code That Decides and Repeats Level 1 — Programming and the Computer’s Inner Workings | Difficulty ★★☆☆☆ | Estimated time: 3.5 hours Prerequisites: Steps 41–42 complete.…
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Step 44. Functions and Modules — Building and Assembling Parts

Step 44. Functions and Modules — Building and Assembling Parts Level 1 — Programming and the Computer’s Inner Workings | Difficulty ★★☆☆☆ | Estimated time: 3 hours Prerequisites: Steps 41–43 complete. You…
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Step 45. File Input/Output — Making Programs That Remember

Step 45. File Input/Output — Making Programs That Remember Level 1 — Programming and the Computer’s Inner Workings | Difficulty ★★☆☆☆ | Estimated time: 3 hours Prerequisites: Steps 41–44 complete. You can…
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Step 46. Exception Handling and Debugging — Programs That Get Back Up When They Fall

Step 46. Exception Handling and Debugging — Programs That Get Back Up When They Fall Level 1 — Programming and the Computer’s Inner Workings | Difficulty ★★☆☆☆ | Estimated time: 3 hours…
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Step 47. ★ Project: Rock-Paper-Scissors — Your First Game Completed Without a Manual

Step 47. ★ Project: Rock-Paper-Scissors — Your First Game Completed Without a Manual Level 1 — Programming and the Computer’s Inner Workings | Difficulty ★★★☆☆ | Estimated time: 4 hours Prerequisites: Steps…
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Step 48. Regular Expressions — A Magnet That Finds by Shape

Step 48. Regular Expressions — A Magnet That Finds by Shape Level 1 — Programming and the Computer’s Inner Workings | Difficulty ★★★☆☆ | Estimated time: 3.5 hours Prerequisites: Steps 41–46 complete.…
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Step 49. ★ Project: Password Tool — Building Your First Security Tool

Step 49. ★ Project: Password Tool — Building Your First Security Tool Level 1 — Programming and the Computer’s Insides | Difficulty ★★★☆☆ | Estimated time: 4 hours Prerequisites: Steps 41–48 complete.…
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Step 50. Exploring Encoding — The Bridge Between Letters and Numbers

Step 50. Exploring Encoding — The Bridge Between Letters and Numbers Level 1 — Programming and the Computer’s Insides | Difficulty ★★☆☆☆ | Estimated time: 3 hours Prerequisites: Steps 41–49 complete. You…
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Step 51. The Standard Library — The Toolbox Already Inside Python

Step 51. The Standard Library — The Toolbox Already Inside Python Level 1 — Programming and the Computer’s Insides | Difficulty ★★☆☆☆ | Estimated time: 3 hours Prerequisites: Steps 41–50 complete. You…
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Step 52. Classes and Object Orientation — Data and Behavior in One Box

Step 52. Classes and Object Orientation — Data and Behavior in One Box Level 1 — Programming and the Computer’s Insides | Difficulty ★★☆☆☆ | Estimated time: 3 hours Prerequisites: Steps 41–51…
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Step 53. pip and Virtual Environments — How to Bring the World’s Tools into Your Room

Step 53. pip and Virtual Environments — How to Bring the World’s Tools into Your Room Level 1 — Programming and the Computer’s Insides | Difficulty ★★☆☆☆ | Estimated time: 3 hours…
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Step 54. Algorithm Training 1 — The Muscle That Translates Problems into Code

Step 54. Algorithm Training 1 — The Muscle That Translates Problems into Code Level 1 — Programming and the Computer’s Insides | Difficulty ★★☆☆☆ | Estimated time: 4 hours (split across several…
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Step 55. ★ Project: Log Analyzer — Pick the Footprints Out of the Pile of Records

Step 55. ★ Project: Log Analyzer — Pick the Footprints Out of the Pile of Records Level 1 — Programming and the Computer’s Insides | Difficulty ★★★☆☆ | Estimated time: 4 hours…
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Step 56. Starting C — In the Language the Machine Knows Directly

Step 56. Starting C — In the Language the Machine Knows Directly Level 1 — Programming and the Computer’s Insides | Difficulty ★★★☆☆ | Estimated time: 4 hours Prerequisites: Steps 41–55 complete.…
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Step 57. C Control Flow and Functions — Same Thinking, Different Notation

Step 57. C Control Flow and Functions — Same Thinking, Different Notation Level 1 — Programming and the Computer’s Inner Workings | Difficulty ★★★☆☆ | Estimated time: 4 hours Prerequisites: Step 56…
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Step 58. Pointers 1 — The Day You Hold Addresses in Your Hand

Step 58. Pointers 1 — The Day You Hold Addresses in Your Hand Level 1 — Programming and the Computer’s Inner Workings | Difficulty ★★★★☆ | Estimated time: 4 hours Prerequisites: Steps…
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Step 59. Pointers 2: Arrays — The Law of Adjacent Slots

Step 59. Pointers 2: Arrays — The Law of Adjacent Slots Level 1 — Programming and the Computer’s Inner Workings | Difficulty ★★★★☆ | Estimated time: 4 hours Prerequisites: Steps 56–58 complete.…
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Step 60. Memory Layout — The Map of a Running Program

Step 60. Memory Layout — The Map of a Running Program Level 1 — Programming and the Computer’s Inner Workings | Difficulty ★★★★☆ | Estimated time: 4 hours Prerequisites: Steps 56–59 complete.…
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Step 61. malloc and free — Borrow from the Heap and Return It

Step 61. malloc and free — Borrow from the Heap and Return It Level 1 — Programming and the Computer’s Inner Workings | Difficulty ★★★★☆ | Estimated time: 4 hours Prerequisites: Steps…
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Step 62. Experiment: Buffer Overflow — Where the Overflowing Input Goes

Step 62. Experiment: Buffer Overflow — Where the Overflowing Input Goes Level 1 — Programming and the Computer’s Inner Workings | Difficulty ★★★★☆ | Estimated time: 4 hours Prerequisites: Steps 56–61 complete.…
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Step 63. The Compilation Process — Four Workers Passing the Baton

Step 63. The Compilation Process — Four Workers Passing the Baton Level 1 — Programming and the Computer’s Inner Workings | Difficulty ★★★☆☆ | Estimated time: 3 hours Prerequisites: Steps 56–62 complete.…
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Step 64. First Encounter with Assembly — The Final Form of My Code

Step 64. First Encounter with Assembly — The Final Form of My Code Level 1 — Programming and the Computer’s Inner Workings | Difficulty ★★★★☆ | Estimated time: 4 hours Prerequisites: Steps…
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Step 65. CPU and Registers — Seeing the Heartbeat of Execution

Step 65. CPU and Registers — Seeing the Heartbeat of Execution Level 1 — Programming and the Computer’s Interior | Difficulty ★★★★☆ | Estimated time: 4 hours Prerequisites: Steps 56–64 complete; you’ve…
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Step 66. The Structure of an Executable — The Blueprint Inside the Icon

Step 66. The Structure of an Executable — The Blueprint Inside the Icon Level 1 — Programming and the Computer’s Interior | Difficulty ★★★☆☆ | Estimated time: 3 hours Prerequisites: Steps 56–65…
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Step 67. The Role of the Operating System — Every Request Goes to the Kernel

Step 67. The Role of the Operating System — Every Request Goes to the Kernel Level 1 — Programming and the Computer’s Interior | Difficulty ★★★☆☆ | Estimated time: 3 hours Prerequisites:…
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Step 68. The True Nature of a Process — The fork Experiment

Step 68. The True Nature of a Process — The fork Experiment Level 1 — Programming and the Computer’s Interior | Difficulty ★★★☆☆ | Estimated time: 3 hours Prerequisites: Steps 56–67 complete;…
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Step 69. Virtual Memory — Every Process’s Sweet Illusion

Step 69. Virtual Memory — Every Process’s Sweet Illusion Level 1 — Programming and the Computer’s Interior | Difficulty ★★★☆☆ | Estimated time: 3 hours Prerequisites: Step 68 complete; you confirmed by…
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Step 70. Project — Building a Memory Observation Tool in C

Step 70. Project — Building a Memory Observation Tool in C Level 1 — Programming and the Computer’s Interior | Difficulty ★★★★☆ | Estimated time: 4 hours Prerequisites: Steps 56–69 complete; you…
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Step 71. HTML/CSS Basics — A Web Page’s Skeleton and Clothes

Step 71. HTML/CSS Basics — A Web Page’s Skeleton and Clothes Level 1 — Programming and the Computer’s Interior | Difficulty ★★☆☆☆ | Estimated time: 3 hours Prerequisites: you can create and…
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Step 72. JavaScript Basics — The Language That Brings Web Pages to Life

Step 72. JavaScript Basics — The Language That Brings Web Pages to Life Level 1 — Programming and the Computer’s Interior | Difficulty ★★★☆☆ | Estimated time: 3 hours Prerequisites: Step 71…
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Step 73. Understanding HTTP Completely — The Web’s Rules of Conversation

Step 73. Understanding HTTP Completely — The Web’s Rules of Conversation Level 1 — Programming and the Computer’s Insides | Difficulty ★★★☆☆ | Estimated time: 4 hours Prerequisites: Steps 71–72 complete; you…
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Step 74. The requests Library — Talking to the Web with Python

Step 74. The requests Library — Talking to the Web with Python Level 1 — Programming and the Computer’s Insides | Difficulty ★★★☆☆ | Estimated time: 3 hours Prerequisites: Step 73 complete;…
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Step 75. Crawling with BeautifulSoup — Pulling Only What You Want from HTML

Step 75. Crawling with BeautifulSoup — Pulling Only What You Want from HTML Level 1 — Programming and the Computer’s Insides | Difficulty ★★★☆☆ | Estimated time: 3 hours Prerequisites: Step 74…
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Step 76. Crawlers and Automation — A Collector That Works by Itself Every Day

Step 76. Crawlers and Automation — A Collector That Works by Itself Every Day Level 1 — Programming and the Computer’s Insides | Difficulty ★★★★☆ | Estimated time: 4 hours Prerequisites: Steps…
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Step 77. Socket Communication 1 — A TCP echo Server and Client

Step 77. Socket Communication 1 — A TCP echo Server and Client Level 1 — Programming and the Computer’s Insides | Difficulty ★★★★☆ | Estimated time: 4 hours Prerequisites: you know the…
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Step 78. Socket Communication 2 — A Multi-Client Chat Server

Step 78. Socket Communication 2 — A Multi-Client Chat Server Level 1 — Programming and the Computer’s Insides | Difficulty ★★★★☆ | Estimated time: 4 hours Prerequisites: Step 77 complete; you know…
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Step 79. The Port Scanner — A Scout That Finds Open Doors

Step 79. The Port Scanner — A Scout That Finds Open Doors Level 1 — Programming and the Computer’s Insides | Difficulty ★★★★☆ | Estimated time: 4 hours Prerequisites: Steps 77–78 complete;…
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Step 80. Introduction to Scapy — The Handmade Packet Workshop

Step 80. Introduction to Scapy — The Handmade Packet Workshop Level 1 — Programming and the Computer’s Insides | Difficulty ★★★★☆ | Estimated time: 4 hours Prerequisites: Steps 77–79 complete; you know…
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Step 81. Mastering nmap — The Standard Tool of Reconnaissance

Step 81. Mastering nmap — The Standard Tool of Reconnaissance Level 1 — Programming and the Inside of a Computer | Difficulty ★★★☆☆ | Estimated time: 3 hours Prerequisites: Steps 79–80 complete.…
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Step 82. Project — Network Map and Risk Assessment

Step 82. Project — Network Map and Risk Assessment Level 1 — Programming and the Inside of a Computer | Difficulty ★★★★☆ | Estimated time: 4 hours Prerequisites: Step 81 complete. You…
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Step 83. Wireshark 1 — Capture and Filters, the Microscope of Networks

Step 83. Wireshark 1 — Capture and Filters, the Microscope of Networks Level 1 — Programming and the Inside of a Computer | Difficulty ★★★☆☆ | Estimated time: 3 hours Prerequisites: Step…
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Step 84. Wireshark 2 — Dissecting Protocols and Detecting Anomalies

Step 84. Wireshark 2 — Dissecting Protocols and Detecting Anomalies Level 1 — Programming and the Inside of a Computer | Difficulty ★★★☆☆ | Estimated time: 3 hours Prerequisites: Step 83 complete.…
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Step 85. Project — HTTP vs HTTPS Comparison Report

Step 85. Project — HTTP vs HTTPS Comparison Report Level 1 — Programming and the Inside of a Computer | Difficulty ★★★☆☆ | Estimated time: 3 hours Prerequisites: Steps 83–84 complete —…
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Step 86. Git Basics — A Time Machine for Code

Step 86. Git Basics — A Time Machine for Code Level 1 — Programming and the Inside of a Computer | Difficulty ★★☆☆☆ | Estimated time: 2.5 hours Prerequisites: Python basics from…
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Step 87. GitHub Remote Repositories and Your Portfolio — Both Backup and Showcase

Step 87. GitHub Remote Repositories and Your Portfolio — Both Backup and Showcase Level 1 — Programming and the Inside of a Computer | Difficulty ★★☆☆☆ | Estimated time: 3 hours Prerequisites:…
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Step 88. Branches and merge — Parallel Universes and Merging

Step 88. Branches and merge — Parallel Universes and Merging Level 1 — Programming and the Inside of a Computer | Difficulty ★★★☆☆ | Estimated time: 3 hours Prerequisites: Git basics from…
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Step 89. Markdown Documentation — Your Own Personal Wiki

Step 89. Markdown Documentation — Your Own Personal Wiki Level 1 — Programming and the Inside of a Computer | Difficulty ★☆☆☆☆ | Estimated time: 2 hours Prerequisites: markdown basics from Step…
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Step 90. Project — XOR File Encryption/Decryption Tool

Step 90. Project — XOR File Encryption/Decryption Tool Level 1 — Programming and the Inside of a Computer | Difficulty ★★★☆☆ | Estimated time: 3 hours Prerequisites: Python basics from Steps 41–46…
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Step 91. Linux Review — OverTheWire Bandit 0–10

Step 91. Linux Review — OverTheWire Bandit 0–10 Level 1 — Programming and the Inside of a Computer | Difficulty ★★☆☆☆ | Estimated time: 3 hours Prerequisites: basic Linux commands from Steps…
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Step 92. SQL Basics 1 — Talking to a Database (CRUD)

Step 92. SQL Basics 1 — Talking to a Database (CRUD) Level 1 — Programming and the Inside of a Computer | Difficulty ★★☆☆☆ | Estimated time: 2.5 hours Prerequisites: basic terminal…
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Step 93. SQL Basics 2 — JOIN and Python Integration

Step 93. SQL Basics 2 — JOIN and Python Integration Level 1 — Programming and the Inside of a Computer | Difficulty ★★★☆☆ | Estimated time: 3 hours Prerequisites: CRUD and SQLite…
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Step 94. A Taste of Flask — Building Your Own Web Server

Step 94. A Taste of Flask — Building Your Own Web Server Level 1 — Programming and the Inside of a Computer | Difficulty ★★★☆☆ | Estimated time: 3 hours Prerequisites: HTTP…
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Step 95. Level 1 Comprehensive Project — Completing a Network Watchdog Tool

Step 95. Level 1 Comprehensive Project — Completing a Network Watchdog Tool Level 1 — Programming and the Inside of a Computer | Difficulty ★★★★☆ | Estimated time: 4 hours Prerequisites: Steps…
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