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Secret Identity, you've got to have some excuses about your family being constantly protected, knowing things only you-with the-mask was supposed to know, etc. So you say: "Well, Captain Order? Well, I know him. He is my close friend." Therefore, you may actually avoid your identity being revealed: "Well, Captain Order is obivously not John Doe, although they look similar" Bonus points: if you are a Rich Idiot with No Day Job, you may also make and give these wonderful toys to yourself. However, this often leads to intentional Bruce Wayne Held Hostage. If you have some friends with shapeshifting powers, good actors and so on, you can also pull off a Identity Impersonator.