AES Text Encryption
Encrypt text with a passphrase using AES-GCM, and decrypt it again.
The only thing protecting the message. There is no way to recover the text
without it.
The output is Base64 over a 16 byte salt, a 12 byte nonce and the ciphertext with its authentication tag. The key is derived with PBKDF2-HMAC-SHA-256 over 600,000 rounds, which is what makes a short passphrase expensive to guess and why encrypting takes a moment. Only this tool reads the format.
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