Yes Stanav 5.1.1 supports 256 bit AES. As i treat you as an expert in this PDF subject so it would be great if you try your encoding permutation & combinations in same, as i do have less knowledge in same area.

Also please lemme know in case of any input or discussion.

Thanks....
Take Care..
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Quote Originally Posted by stanav View Post
Oh, really? I didn't know that. I'm still on 5.0.2 (no immediate need to upgrade yet).
I still wonder though, if that is the case as you said 5.1.1 supports 256 AES then why wouldn't it work? Have you tried using UTF-8 encoder to convert the password to bytes array and then passing it to the constructor of the pdfreader class? In my code, I was using the system default encoder, which might not be UTF8 in other regions.