Create a secure symmetric key (AES-GCM) that will be used for both encryption and decryption.
Paste your key and enter a message to encrypt.
Your encrypted message here is unreadable without the key!
Paste the same key and encrypted message to decrypt.
Symmetric cryptography uses the same key for both encryption and decryption. Here we are using AES-GCM (Advanced Encryption Standard - Galois/Counter Mode), a secure and popular encryption algorithm.