Voltage Security announced that cell phone maker Siemens is putting its encryption technology to the test. Ten corporate customers of Siemens’ communications group will take part in a beta of Voltage’s identity-based encryption, or IBE, toolkit. The technology takes identity information–such as an email address, phone number or IP address–and uses that for the public key for a cryptographic system. Siemens has integrated the IBE Toolkit into smart phones running Microsoft Windows Mobile operating system.