If my options were Amazon or roll my own, using Amazon would both 1) Decrease complexity, and 2) Add more security. This is supposing I am not a security exp

If my options were Amazon or roll my own, using Amazon would both 1) Decrease complexity, and 2) Add more security. This is supposing I am not a security expert and that Amazon has a good implementation. Of course, we all have libraries to use etc. It's still a pretty good option.