enchanted creature has shroud. this card has shroud?

[Machop]

I dont understand cards that say that enchanted creature has shroud like Robe of Mirrors.

If this creature has shroud then I thought it cannot be enchanted so how does the enchantment work??

[seba1983]

the enchanted creature only has shroud as soon as the enchantment is attached to the creature. once its attached it does not target. so at the time the enchantment is put on the creature it does not have shroud yet so it can be enchanted at that time.