Click Here to install KSU Certificate Authority Certificate onto your system. Click Here to install this on a Mac. For security reasons, here are the thumbprints for that certificate: SHA1: 05 50 2C BD 11 17 B7 AC A1 A8 13 84 0D 3D 83 6A 27 AB E9 6A MD5: B6 8A 5A FE E5 2F B9 00 BF B2 E6 FB 07 89 C9 BA The OLD CA Cert is also available for servers that are still running on the OLD Key Click Here to install the OLD KSU Certificate onto your system. Click Here to install this on a Mac. SHA1: 759495A 5238D602 5BBC8781 BBF83D1D 3587BE80 MD5: 5DAAF482 67CFC729 9657B561 DB832768 Installation Instructions: Opera 5/6/7: Choose "OK" Opera 4.xx: Choose "Show in Opera" and then "OK" Internet Explorer 6: Choose "Open" and then "Install certificate..." Internet Explorer 4/5: Choose "Open this file from it's current location" and then "Install certificate..." Mozilla 1.xx & Netscape 6/7: Then tick all three options and then click "OK" Netscape Communicator 4.xx: Otherwise choose "Next" for all questions but for "Accept this Certificate Authority for Certifying ...", here you tick all three options then click "Next". Netscape also asks a short name for new Certificate Authority. It's recommended to use CA's name, for example "CAcert.org Signing Authority"