How much safe is the Encryption

I’m using Pura Vida extension for crypt/encrypt. My question is:
is it possible for an expert to retrieve the password from the source file?

if someone spends some time into it, then probably yes, nothing is 100% secure
see also Q1 here App Inventor Extensions: AES Encrypt/Decrypt | Pura Vida Apps


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

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thank you for the answer