Data hashing

Before moving on, it is important to understand an essential concept not only in blockchain but in technology in general. This is hashing.

Hashing is everywhere and for example any antivirus software relies on it to verify files and detect malware extremely quickly.

In simple terms hashing transforms any kind of data, whether it is an image, text, or a file, into a unique string of characters that completely identifies that specific data. If you change a single pixel in an image, a single letter in a text, or just one byte in a file, the code changes entirely.

This makes it the perfect way to verify the integrity of data and when combined with blockchain it becomes a powerful combination. Blockchain is immutable, meaning that data cannot be altered or deleted, and hashing produces a unique and entirely different identifier for any piece of data.

Together they form the perfect system to verify information with complete certainty and without any possibility of error.