Plugin to rename uploaded files?

I am working on a directory in WordPress, and I am looking for a plugin that will rename files that are uploaded to my site when they are uploaded.

For example, if someone uploads a file called “mycat.jpg”, it will rename it to a randomized set of numbers and/or letters, like “1xfde4f3.jpg” or something similar.

I want to do this to avoid duplicate file names and seeing -2, -3 after the file names. This would also help prevent image theft.

I am also looking for something that will append letters or numbers to a page name, like a zip code or something (ie. “bar-name-34668”) to avoid duplicate titles for businesses that have the same name, but are in different locales.

Any suggestions?