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Single log-on is similar to single sign-on with the exception that the central server authentication mechanism is the mechanism used by all the applications, machine, and domains with which the user needs to interact. Rather than store identifier/authenticator pairs for each verification, the one-time verification is accepted by all resources as the only verification needed. Additionally, the authorizations are maintained at the central server and the individual applications, machines, and domains query the central location to determine whether a specific access is authorized. Single log-on eliminates the need for authorization at each resource and for individual authentications to each resource.