Information handling system security is maintained by locking the information handling system from boot of an operating system with a service processor of the information handling system. The service processor obtains authorization for boot from a third party authentication service by providing authentication information to the authentication service and requiring a successful authentication for boot. For example, the service processor releases a token upon successful authentication to authorize boot. In one embodiment, the authentication service sends a token to the service processor for the service processor to use to authorize boot.