I just found this out completely by accident. I am posting it here before going to post it to Apple. Like most, I keep my phone locked at all times. But today I was trying different things with Siri. I found that even with the phone locked you can ask questions like, "What is my name?" "What is my address? "What is my phone number?" And Siri will tell you all the information. When I asked for my address I got my home address, work address and my rental addresses. I could not launch apps but I can get all the personal information about me. I would guess I could get a lot more information by asking the right questions.