Why Hackers Can’t Unhash Your Password

In this video, you’ll learn what hashing really is, how it differs from encryption, and why hash functions can never be reversed.

Many beginners confuse hashing with encryption because both transform data into unreadable values. In this lesson, we break that confusion by first showing simple mathematical functions that do have reverse operations—where an output can be decrypted back to the original input. We then explain why those reversible functions are NOT hashing.

You’ll discover:

What hashing is in simple terms

Why hash functions are one-way by design

Why a hash can never have a “reverse function”

How hashing is different from encryption and encoding

Why passwords are hashed instead of encrypted

How bcrypt works conceptually and why it’s used in real-world applications

We also explain salting, uniqueness, and verification, showing how systems check passwords without ever knowing the original password.

This video is perfect for:

Beginners learning cybersecurity

Students studying computer science or software engineering

Developers using Node.js, Express, or authentication systems

Anyone confused about “decrypting hashes”

By the end of this video, you’ll clearly understand why hashing cannot be reversed, why that’s a security feature, and how modern systems like bcrypt protect user passwords.

🔍 Keywords / Topics Covered

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bcrypt explained
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