Is AES256 Really Secure?

Is AES256 really secure? I am using it with decoded os.urandom(32) , how hard is it to decrypt? It is impossible to find the key with brute-force ( even if anyone trys to find the key with brute-force, it takes very very long ), is there any way to decrypt it without the key?

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any thoughts?

Of course it's secure... for now. If it wasn't, the entire world would be in panic. My sources say that urandom is a CSPRNG so you should be fine. An appropriate attack vector would to be through whatever application that implements the algorithm. Cryptology is an incredibly advanced topic so if I were you, I wouldn't try dealing with it directly unless I had years of experience with mathematics theory.

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