Thanks for all your comments and knowledge you shared with me.I really found it useful.
Joe Winograd
The question is, "How can i recover data that has been blacked out from a jpg file". The answer is, "You can't". I marked the first post with that as the Accepted Solution and the other two posts with that as Assisted Solutions. However, it is an interesting idea that there may be an earlier, recoverable version of the file without the redaction, so I marked that as an Assisted Solution, too. Points split evenly among the participating experts.