Prime numbers

These numbers have always been in discussion since the inception of algebra. A number is basically a number which is not divisible by any whole number but 1 and itself. Prime numbers are interesting because let’s day if I give you one large number (the big guy) which is multiplied by two prime numbers which are also a large, so it would be impossible for us to know what the big guy is made of (depends on how large is the prime number); and that exact behaviour is what makes them interesting for digital security. These days every digital lock is using encryptions that is fundamentally powered by prime numbers.

Let me give you a brief explaination about how it works. So for the sake of example let’s say there is a lock and that lock has two keys, one for locking the lock and another is for unlocking it. Now the key for locking the lock is called a public key, and it’s made publicly available for everyone; or to put it simply we can call it ’encryption key’. The other key is the most important key because it’s used for unlocking the lock and it’s generally made impossible to replicate. We can call it a ‘decryption key’. Now you must be wondering how is it possible for a lock to have two different keys; haha that’s the magic or should I say mathematics! Yeah, so let’s get serious again! The encryption key and decryption key are linked by a mathematical function using prime numbers (so we’d day there is a relation between the keys). So whenever you try to unlock the lock using the decryption key, it will first check if the decryption key is related to the encryption key (In layman’s terms, if the person who has locked the lock has some relation with the unlocker)