How Hash and Blockchain Detect Whether Content Is Real
Any digital file (a video, a photo, or a document) can be altered nowadays and, at first glance, it is impossible to notice. To solve this, blockchain technology offers a way to verify the authenticity of information without relying on trust in any institution. To understand how it works, the first step is to know what a hash is. Imagine it as the fingerprint of data: it is a mathematical algorithm that takes any input information and transforms it into a unique, fixed code. If someone changes a single detail of the original file, the hash changes completely, instantly revealing the manipulation. By combining this process with the decentralized nature of the blockchain, data is guaranteed to be immutable and secure. What Is a Hash Function To understand how information is protected in the digital world, the first step is to know what hashing is. In simple language, a hash function is a mathematical algorithm that takes any type of data as input and transforms it into a fixed-length...