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What is Hashing?

Hashing is like creating a unique, scrambled code for any kind of information, whether it's a sentence, a whole book, or even a picture. This scrambled code, called a "hash," has some super cool properties:

How Do We Use Hashing?

1. Keeping Secrets Safe:

When people create passwords for their online accounts, the websites use hashing. Instead of remembering your password, the website keeps the hash of your password. So, even if bad guys get a hold of the hash, they can’t figure out your password. Plus, when you log in, the website hashes the password you enter and checks if it matches the hash they have. Neat, right?

2. Checking if Files Are the Same:

Imagine downloading a game. How do you know it hasn’t been tampered with or damaged during the download? Websites often provide a hash of the file they're giving you. Once you download the file, you can use special software to hash the file on your end. If your hash matches the one from the website, you know the file is exactly what it’s supposed to be!

3. Trusting Your Downloads:

When downloading new apps or software packages, hashes help to make sure they’re safe and haven’t been changed by hackers. The creators of the software provide a specific hash value. After you download the software, you can calculate the hash on your own. If your hash matches the provided one, it’s like getting a thumbs-up that your software is good to go!

Hashing in a Nutshell:

Hashing is like the secret code of the internet. It helps keep your passwords safe, makes sure the files you download are the real deal, and much more. Just like in our secret note scenario, hashing takes information and scrambles it into a special code, but with some magic math to make it super secure and useful for all kinds of important stuff online!

So, next time you hear someone talking about hashing, you can think about secret codes and know it’s just a cool, mathy way to keep information safe and check that things on the internet are exactly what they're supposed to be!