!!! Overview [{$pagename}] is an [Instant Messaging] [service] by [Apple] and is supported by the Messages application in [iOS] 5 and later[1] and [OSX] Mountain Lion and later. [{$pagename}] [Messages] are [encrypted] using [TLS] and can be tracked using delivery receipts. [{$pagename}], when sending to another user using [{$pagename}] is [End-to-end Encryption] using keys not available to [Apple]. [{$pagename}] [protocol] is based on the [Apple Push Notification] service (APNs)—a proprietary, [binary] [protocol]. [{$pagename}] sets up a Keep-Alive connection with the [Apple] servers. Every connection has its own unique code, which acts as an [identifier] for the route that should be used to send a [message] to a specific [device]. The connection is [encrypted] with [TLS] using a [Client-side] [certificate], that is requested by the [device] on the activation of [{$pagename}]. !! More Information There might be more information for this subject on one of the following: [{ReferringPagesPlugin before='*' after='\n' }]