Vanguard ez/Token for RACF, ACF2, and Top Secret leverages existing multifactor authentication for z/OS Security Server mainframes. It provides a cost-effective and convenient method to enhance enterprise-wide access for employees, allowing secure access to critical resources without the need to remember or reset passwords. Vanguard ez/Token replaces traditional passwords with one-time passcodes generated randomly every 60 seconds. These passcodes can be combined with a pin number for enhanced security. Vanguard ez/Token offers authentication to the mainframe using various token technologies via TSO, CICS, IMS, or any application utilizing z/OS Security Server authentication.