YPS communication issue on Windows

Check about Microsoft update http://support.microsoft.com/kb/2661254 installation on system. This update is for Windows XP, Vista, Server2003/2008, Windows 7 and 8

Problem: The issue is in validating the server certificate by Runtime during SSL handshake from YPS

Cause: Microsoft has deprecated RSA certificates with length less than 1024 and provided a patch on all current Windows versions. The patch automatically block the use of all RSA certificates with length less than 1024 bits. Due to the same, the Sentinel Cloud .NET runtime with our current 512-bit certificates will not work on Windows machines with the above mentioned PKI patch installed.

The workaround for now is to allow the usage of 512-bit certificates on the system


  • Run the following command at command prompt to make it work
  • “certutil –setreg chain\MinRsaPubKeyBitLength 512”

We will keep all informed about the formal fix availability