This is a super niche use case, but maybe this: For DRM, you may be interested in using a cipher that is both easy to implement (though the spec makes this sur

This is a super niche use case, but maybe this: For DRM, you may be interested in using a cipher that is both easy to implement (though the spec makes this surprisingly confusing because they can't keep their orders of stuff straight), relatively fast (because you might be running it through a VM) and has no known constants that could be used to identify it quickly.