If you're interested in some reading about ARX systems, a good paper is Rotational Cryptanalysis of ARX[1]. It's quite readable. If you follow the citations of

If you're interested in some reading about ARX systems, a good paper is Rotational Cryptanalysis of ARX[1]. It's quite readable. If you follow the citations of that paper [2], you can find some interesting stuff. [1] https://www.iacr.org/archive/fse2010/61470339/61470339.pdf https://www.iacr.org/archive/fse2010/61470339/61470339.pdf [2] https://scholar.google.com/scholar?um=1&ie=UTF-8&lr&cites=3827474985979909897 https://scholar.google.com/scholar?um=1&ie=UTF-8&lr&cites=38...