Mobile Devices

Push Messaging ◾ 91

• Provider: Each provider requires a unique provider certicate and

private cryptographic key for validating its connection with APNS.

is certicate, provisioned by Apple, must identify the particular

topic published by the provider; the topic is the bundle ID of the

client application. For each notication, the provider must furnish

APNS with a device token identifying the target device. e provider

may wish to validate the service it is connecting to using the public

server certicate provided by the APNS server (optional).

• Device: e system uses the public server certicate passed to it by

APNS to authenticate the service that it has connected to. It has a

unique private key and certicate that it uses to authen ...