Think of this as an open padlock. You can hand it out to anyone in the world. Anyone with this "padlock" can use it to lock a message, but they cannot use it to open one.
One of the oldest and most widely used, based on the difficulty of factoring giant prime numbers.
It proves that a message actually came from who it says it came from. If a message can be decrypted with Alice’s public key, it must have been encrypted with Alice’s private key. Asymmetric Cryptography.epub
The Dual-Key Revolution: Understanding Asymmetric Cryptography
The answer arrived in the 1970s with , also known as Public-Key Cryptography. It is the invisible bedrock of every "https" website, encrypted chat, and digital signature we use today. How It Works: The Padlock and the Key Think of this as an open padlock
This "one-way" math ensures that even if a hacker sees your public key, they cannot figure out your private key. It solves the "key distribution problem" because you never have to send your private key over the internet. Why It Matters
The math protecting our data today relies on problems that would take "classical" computers trillions of years to solve. However, are theoretically capable of cracking these codes in minutes. One of the oldest and most widely used,
Only the intended recipient can read the message.