Primarily used for "key exchange," allowing two parties to create a shared secret over an insecure channel. The Quantum Threat
Only the intended recipient can read the message. Asymmetric Cryptography.epub
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 Primarily used for "key exchange," allowing two parties
In the early days of secret-keeping, if you wanted to send a locked box to a friend, you both needed a copy of the exact same key. This "symmetric" approach worked well until the internet arrived. Suddenly, billions of people needed to exchange secrets with strangers they had never met. How do you share a key without someone stealing it in transit? It solves the "key distribution problem" because you
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.