Because many of us throw code over the wall when we fail to write secure code. We now put business logic as smart contracts inside SGX enclaves. Voila, new patterns of security bugs...here 
// ToDo unwrap this post (I am too tired now).
YOUTUBE ozO_UDKK1Vw "I can't sleep at night, let's walk in the rain to celebrate this [security] misery. Echo & The Bunnymen
Hyperledger PDO, FPC, Cactus, secure encalves.