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.
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. Asymmetric Cryptography.epub
This is the physical key that stays in your pocket. Only this specific key can unlock the messages sealed by your public "padlock." It proves that a message actually came from
Primarily used for "key exchange," allowing two parties to create a shared secret over an insecure channel. The Quantum Threat You can hand it out to anyone in the world
A modern favorite for mobile devices because it provides the same security as RSA but with much smaller keys, saving battery and data.
Asymmetric cryptography provides three critical pillars of digital trust: