The Internet has a trust problem. It’s just too easy to fake a photo these days. A startup called Fourandsix hopes to profit by bringing some certainty to the situation with a new service called Izitru that can help verify the authenticity of photos. It won’t necessarily help you figure out if a photo shared on Facebook is too good to be true, but it can be used if you’re a photographer who just took a potentially viral picture and want people to know it’s real.