encryption with a one letter XOR? Really? posted April 2015
So there is this app that encrypts your data on your mobile, in case it ends up in the wrong hands. Sounds good. And then there is this guy who took a look at it and figured out the data was just XORed with a 128bit keys consisting of only 4s. If the data is longer than 128bits? Let's not encrypt it!
I don't know how legit it is, especially considering how easy it is to just write aes(something) but here you go