Private-Key Duplication: The Safe Use of Wildcard and Multi-Server Certificates

Properly managed, multi-server and wildcard certificates can provide increased flexibility. Since the consequences of a compromise can be more severe than they would be for a conventional certificate, supplemental safeguards should be employed. In the absence of these safeguards, we do not recommend the use of either multi-server or Wildcard certificates, due to both the security risks involved and the expanded scope of management issues in the wake of a compromise.



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