After troubleshooting a problem I was having with the supplier links in Altium Designer, I recently found that, for at least one of the supplier links (Mouser), your login credentials are being passed in clear text. Even better, they are in XML that clearly tells anyone watching what they are. Altium has been notified of this. I haven’t heard back. So, until a fix is rolled out, don’t use the Mouser supplier link with your login credentials.
Permanent link to this article: http://blog.curioussystem.com/2016/08/altium-design-security-advisory/