I got the:
Failed to decrypt XML node "DTS:Password" with error 0c8009000B "Key not valid for use in specified state." bla bla bla
error on the server today. The thing is this is a job that has been in production since 3/16/14 running daily and never had this issue before. I had the server re-run it with no changes and it worked.
I have searched on this error and all I can find are questions from people who don't know/understand about protection level settings. I could not find anything about a production job that throws this error after working for 5 months. I would like to figure out why this happened so I can prevent it from happing again. I don't like having random ticking time bombs in my system. Any ideas/suggestions would be appreciated. Thanks!