gen-briefly-explain-a-digital-signature-and-one-common-misconcep-73c0

Briefly explain a digital signature and one common misconception about it.

# Digital Signature A **digital signature** is a cryptographic technique that verifies the authenticity and integrity of digital messages or documents. It works like this: 1. The sender uses their **private key** to create a unique signature from the document 2. Recipients use the sender's **public key** to verify the signature 3. If verified, it confirms the document came from the claimed sender and wasn't altered ## Common Misconception **Misconception:** Digital signatures encrypt or hide the content of your message. **Reality:** Digital signatures only provide *authentication* and *integrity* — they prove who sent a message and that it hasn't been tampered with. They do **not** provide confidentiality. Anyone can still read a digitally signed document unless it's also separately encrypted. You can think of it like signing a postcard versus sealing a letter — the signature proves it's from you, but everyone can still read what's written.