Hacking possible actual save decrypter

[jonjetjon]

http://dl.qj.net/down/3ds-save-deencrypter.html

found that on qj.net after some long and tedious googling, can anyone confirm real/fake, and can this be used to create save exploits if it's real?

 

[Pong20302000]

most likely just the 2.0.0-2 and below decrypter

 

[Skeet1983]

What can this program be used for? Also, what would I need to extract my saves?