GlobalSign is a
certified certificate authority that provides publicly trusted X.509 compliant SSL certificates.
It is currently the authority used by University of Waterloo IST.
As of mid-2016, such certicates must be either OrganizationSSL (for public IP addresses) or IntranetSSL (for private IP addresses). It is hoped that the extra work entailed in setting up a correct IntranetSSL chain results in increased security for that connection.
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-- AdrianPepper - 23 Feb 2011