The HP StorageWorks Secure Key Manager (SKM) is a hardened security appliance providing centralized key management operations for HP StorageWorks Enterprise Storage Library (ESL) E-Series Tape Libraries and HP StorageWorks Enterprise Modular Library (EML) E-Series Tape Libraries. This ESG Lab report documents the results of hands-on testing of HP SKM solutions with a focus on ease of deployment, transparent integration with existing backup operations, clustered fault tolerance and strong security.