Encrypte message with a "standard" aes key

I would like to know if it is a solution to encrypt a small message with a standard, ie ESP32 library compatible.

Many thanks for your help.
Regards and happy new year !

I can offer my AES Encryption Extension to encrypt/decrypt strings, which uses AES 128, CBC, and PKCS5 padding

for the extensions directory see here https://puravidaapps.com/extensions.php


Trying to push the limits! Snippets, Tutorials and Extensions from Pura Vida Apps by Taifun.

Taifun is advertising a paid for extension. It might be what you want.

Here is a FREE extension that might be suitable https://community.thunkable.com/t/free-another-aes-encryption-extension/9722 that probably works with App Inventor.