Encryption is a security technique that takes data, like text, and scrambles it into a secret message so it can't be read by another party. Decryption is what allows the recipient of the secret message to unscramble it back into a readable state. Encryption uses various algorithms or ciphers to do the scrambling
Example
“All data transmitted between a trader's browser and their brokerage platform is protected by AES-256 encryption, ensuring that account credentials and order details cannot be intercepted by hackers.”