public key

A public key is like a lock on a door. It is a special type of code that's used to secure things. To use a public key, you need two separate codes. The first code is called the "public key". This code is like a lock on a door, and it prevents anyone from opening the door unless they have the right code - the "private key". The private key is like a key to the lock. It's a secret code that only the person with the private key knows. When the person with the private key holds it up to the lock, it unlocks the door. Public keys are used to secure data and make sure that only the people who hold the private key can access it.