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Privacy Village Academy
Join The Community!AcademyAbout HGPE
  • Hitchhiker's Guide to Privacy Engineering
    • ❓What is HGPE?
      • ⚖️Who is this for?
      • 🧙‍♂️Privacy Engineering
      • 🎨Creative Privacy
      • 🔮Generative AI
      • 🧑‍💻About the Author
  • 🧙‍♂️The Ethical AI Governance Playbook 2025 Edition
    • 🤖Chapter 1 : AI Literacy
    • 🌍Chapter 2 : AI Governance in the 21st Century
    • ⌛Chapter 3 - Getting Started with AI Act Compliance
    • 🚀Chapter 4 : Rise of AI Governance: Building Ethical & Compliant AI
    • Chapter 5 : Introduction to the Lifecycle of AI
  • 🎓Privacy Engineering Field Guide Season 1
    • ❓Decoding the Digital World: Exploring Everyday Technology
    • 👁️Introduction: Why Privacy Matters?
      • Age of Mass Surveillance
      • Privacy & Democracy
      • Privacy & Government Surveillance
    • ⚡Chapter 1 : How Computers Work?
      • Electricity
      • Bits
      • Logic Gates
      • Central Processing Unit (CPU)
      • Graphic Processing Unit (GPU)
      • Motherboard
      • Data Storage
      • Databases
      • Operating System (OS)
      • Computer Code
      • Programming Languages
      • The File System
      • Bugs and Errors
      • Computer Virus
      • Internet of Things (IoT)
      • Cloud Computing
    • 🛰️Chapter 2 : How the internet works?
      • Physical Infrastructure
      • Network and Protocols
      • Switch
      • Routers
      • IP Address
      • Domain Name System (DNS)
      • Mac Address
      • TCP / IP
      • OSI Model
      • Packets
      • The Client - Server Architecture
      • Secure Socket Shell (SSH)
      • Transport Layer Security (TLS)
      • Firewall
      • Tunnels and VPNs
      • Proxy Server
    • 🖥️Chapter 3 : How Websites Work?
      • HTML
      • CSS
      • Javascript
      • Web Server
      • Browser
      • HTTP
      • Databases
      • Front End (Client Side)
      • Back End (Server Side)
      • Cookies
      • Local Storage
      • Session Storage
      • IndexedDB
      • XHR Requests
      • Web APIs
      • Webhooks
      • Email Server
      • HTTPS
      • Web Application Firewall
      • Single Sign-on (SS0)
      • OAuth 2.0
      • Pixels
      • Canvas Fingerprinting
      • Email Tracking
      • Containers
      • CI/CD
      • Kubernetes
      • Serverless Architecture
    • ⚛️Chapter 4 : How Quantum Computers Work?
      • Quantum Properties
      • Quantum Bits (Qubits)
      • Decoherence
      • Quantum Circuits
      • Quantum Algorithms
      • Quantum Sensing
      • Post-Quantum Cryptography
    • 📳Chapter 5 : Mobile Apps and Privacy
      • Battery
      • Processor
      • Mobile Operating Systems
      • Mobile Data Storage
      • Cellular Data
      • Mobile Device Sensors
      • Wireless Connectivity
      • Camera & Microphone
      • Mobile Apps
      • Software Development Kits (SDKs)
      • Mobile Device Identifiers
      • Bring Your Own Device (BYOD)
  • 🕵️‍♂️Privacy Engineering Field Guide Season 2
    • ❓Introduction to Privacy Engineering for Non-Techs
      • 🎭Chapter 1 : Digital Identities
        • What is identity?
        • Authentication Flows
        • Authentication vs. Authorization
        • OAuth 2.0
        • OpenID Connect (OIDC)
        • Self Sovereign Identities
        • Decentralized Identifiers
        • eIDAS
      • 👁️‍🗨️Chapter 2 : De-Identification
        • Introduction to De-Identification?
        • Input / Output Privacy
        • De-identification Strategies
        • K-Anonymity
        • Differential Privacy
        • Privacy Threat Modeling
  • 📖HGPE Story and Lore
    • 🪦Chapter 1 : The Prologue
    • ☄️Chapter 2 : Battle for Earth
    • 🦠Chapter 3 : A Nightmare To Remember
    • 🧙‍♂️Chapter 4 : The Academy
    • 🌃Chapter 5: The Approaching Darkness
    • ⚔️Chapter 6 : The Invasion
    • 🏰Chapter 7 : The Fall of the Academy
    • 🛩️Chapter 8 : The Escape
    • 🪐Chapter 9 : The Moon Cave
    • 🦇Chapter 10: Queen of Darkness
  • 📺Videos, Audio Book and Soundtracks
    • 🎧Reading Episodes
    • 🎹Soundtracks
  • 👾HGPE Privacy Games and Challenges
    • 🎮Data Privacy Day'23 / Privacy Treasure Hunt Game
    • 🧩Privacy Quest
  • 📬Subscribe Now!
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  1. Privacy Engineering Field Guide Season 1
  2. Chapter 3 : How Websites Work?

Cookies

Websites save information about you in files called cookies.

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Last updated 2 years ago

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Websites save information about you in files called cookies.

They are saved on your computer for the next time you visit that site. Upon your return, the website code will read that file to see that it’s you. For example, when you go to a website, the page remembers your username and password – that’s made possible by a cookie.

Many galactic e-commerce shops use cookies to keep track of the items in a user’s shopping cart as they explore the site.

Without cookies, your shopping cart would reset to zero every time you clicked a new link on the site. That would make it difficult to buy anything online!

A website might also use cookies to keep a record of your most recent visit or to record your login credentials. Many people find this useful so that they can store passwords on frequently used sites, or simply so they know what they have visited or downloaded in the past.

There are types of cookies, like third-party cookies, that come from sites you’re not even visiting at the time and can track you from site to site to gather information about you.

Under normal circumstances, cookies cannot transfer viruses or malware to your computer. However, some viruses and malware may be disguised as cookies. For instance, “supercookies'' can be a potential security concern, and many browsers offer a way to block them. A “zombie cookie” is a cookie that recreates itself after being deleted, making them tough to manage.

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