What do I need to know about Windows 2000 and SSL encryption?
SGC certificates allow more Windows 2000 users (without installing Service Pack 4 or High-Encryption-Pack) connections with 128 bit encryption. If all SSL certificates were SGC-enabled, tens of millions of Internet users would also benefit from strong 128-bit encryption.
This statement was also confirmed by the Yankee Group as part of an investigation in September 2005. In the study, security experts evaluated 23 combinations of client configurations and four typical web servers in 368 tests.