Security Magazine has just leanred that Imprivata, the converged identity and access management appliance company, has improved its OneSign platform. Version 4.0 extends OneSign’s identity-centric access and authentication services across system and geographic boundaries with complete distributed management, delegated administration and business continuity capabilities. OneSign’s integrated authentication management, single sign-on and physical/logical convergence functionalities can now be implemented in a fully-distributed enterprise environment.