一统一协定可有助于一控制器器件与由该控制器控制之一配件器件之间的安全的经鉴认通信。一配件及一控制器可创建一配对，该配对之存在稍后可经验证且用以创建一安全通信工作阶段。该配件可提供将该配件定义为服务之一集合的一配件定义记录，每一服务具有一或多个特性。在一安全通信工作阶段内，该控制器可询问该等特性以判定配件状态及/或修改该等特性以指示该配件改变其状态。

A uniform protocol can facilitate secure, authenticated communication between a controller device and an accessory device that is controlled by the controller. An accessory and a controller can establish a pairing, the existence of which can be verified at a later time and used to create a secure communication session. The accessory can provide an accessory definition record that defines the accessory as a collection of services, each service having one or more characteristics. Within a secure communication session, the controller can interrogate the characteristics to determine accessory state and/or modify the characteristics to instruct the accessory to change its state.