For example, when implementing in-house PKI structure the cost of setting up a network infrastructure, must accommodate secure communication, storage, redundancy, backup, maintenance, and security. When compared to outsourcing to a commercial PKI solution, it is often more profitable in the long run to pay for services. It is control that drives companies to consider in-house solutions. As a result, in-house costs rise as storage for certificate repositories and public key require hardware storage solutions (Conklin 132) for a separate security model. The additional security model includes a router, firewall, and IDS specifically designed to keep hackers out. Additional hardware and software costs also consist of servers with operating system, Microsoft Certificate Server software (Microsoft.com) or commercial based software, licensing, and secure backups. The secure backups should be separate from the standard corporate backups because of the potential exposure to private keys. One central RA would need server accommodations by itself. Furthermore, a separate server for certificate repository adds to the cost and maintenance of in-house design. A key advantage to using a commercial Public CA is that most software and hardware infrastructure is maintained at their site and included in the service price.
In addition, the cost of in-house administration of a PKI does not always present economic feasibility. The corporation would need to hire an experienced PKI administrator to ensure compliance, hardware integrity, redundancy, security, and administration of the private keys and certificates. The environment must be "uniform... [continues]
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