A portable authorization device may include memory and at least one circuit. The memory may be configured to store an identifier and keys corresponding to services associated with the identifier. The at least one circuit may be configured to receive, from a service accessor device, a request to access one of the services. The at least one circuit may be configured to authenticate with the service using at least the identifier and the key for the service. After authenticating with the service, the at least one circuit may be configured to sign and/or encrypt the request based at least on the key for the service, and provide the signed and/or encrypted request to the service. In one or more implementations, the at least one circuit may be configured to facilitate with providing the service to the service accessor device when the service accessor device is granted access to the service.