The CodeJacked weblog demonstrates how to use MD5's to make sure that big-ass download landed on your hard drive intact and identical to the version on the server.

I would like to build in some kind of checksum or md5 checking of the file to make sure it hasnt changed. Anyone have a clue how to do this in VB or know a dll/function I could use?<BR><BR>Thanks ...

Oracle says that starting with April 18, 2017, Java (JRE) will treat all JAR files signed with the MD5 algorithm as unsigned, meaning they'll be considered insecure and blocked from running.