What exactly do you mean by "attacking"? Some people think mere pecking on the back of their leg constitutes "attacking". Or is she attempting to flog you with her neck feathers flared and claws out?
If it's the latter, you do have a problem. Hens don't normally act in this manner, and she may be thinking she needs to protect the flock from you because you're behaving in a manner that threatens her.
In that case, you need to discipline her much the same as you would a problem rooster, with restraint and firmness until she gets the idea her behavior is not acceptable.
As for the other hen's sneak attacks on the one attacking you, wisher nailed it.