Grokking System Design Fundamentals
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What is Authentication?

Authentication in software systems is like showing your ID at the entrance of a club. It's the process of verifying who you are. Here's how it works in the digital world:

  • Basics: Just like the bouncer checks your ID, authentication in software checks if you are who you say you are. This is usually done through something you know (like a password), something you have (like a phone or security token), or something you are (like your fingerprint).

  • Types of Authentication:

    1. Single-Factor Authentication (SFA): This is like showing just one ID card




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