On June 27, 2010, Thawte migrated its public root certification authorities from Roots using MD5 hashing algorithm and 1024 – bit RSA keys to Roots using SHA-1 hashing algorithm and 2048-bit RSA keys.
All Thawte SSL certificates issued after this root migration are signed by an intermediate certificate that chains to a secure off line Root CA.
Please see the following Advisory for additional information Thawte 2048 bit Root Migration
Below is the Thawte Cross Root CA and the new Thawte Intermediate CA's that was utlitized in the root migration. Depending on your product, copy the entries contents from the window (including the -----BEGIN CERTIFICATE---- and -----END CERTIFICATE----- sections) and paste it into a plain text editor such as Notepad or Vi. Then save this as a file. The extension of the file can be dependent on the server or device but typically this is .cer.
Thawte Cross Root CA
Thawte SSL123 Intermediate CA
SSL Web Server and Thawte Wildcard Intermediate CA
Code Signing Intermediate CA