There's fruit in them cables
As long rumored by various outlets, Apple's Lightning cables really do include a special authentication chip that iOS can use to verify that they were produced by an authorized manufacturer.
According to the security whitepaper, the chip is actually manufactured by Apple and contains a special digital certificate known only to the company. Manufacturers that participate in the Made for iPhone Program receive the chips directly from the Cupertino giant and incorporate them into their products during production.
Interestingly, the authentication process is not limited to cables: Any authorized accessory that wants to communicate with iOS--including those that use Bluetooth and Wi-Fi connections--must incorporate it, or risk that the operating system will refuse to play nicely with it.
While this process undoubtedly allows Apple to keep a tight rein on its lucrative accessory licensing business, weeding out third-party manufacturers who produce sub-par hardware or refuse to pay up the necessary royalties to receive the company's official blessing, the authentication chip also helps keep things secure by reducing the likelihood that malicious actors will be able to inject malware into our phones and tablets just because we want to recharge them.
Siri knows everything, but she ain't talkin'
Siri, Apple's digital assistant, also gets some time in the security spotlight. The company has laid out the steps that it takes to balance the service's effectiveness with the privacy and security of its users.
As you can imagine, Siri is complex enough that much of its work takes place on Apple's own servers rather than on each individual device. This allows the company to offload the most taxing aspects of the assistant's functionality, such as turning audio into actionable text, and makes it possible for the service to be updated outside of iOS's traditional upgrade cycle.
Clearly, this means that your device must send Apple a fair bit of information in order for Siri to work--starting with a full recording of your voice, which is transmitted alongside your name and rough geographical location whenever you request your digital assistant's services.
In order to protect your privacy as much as possible, however, Apple uses a mechanism called progressive disclosure to limit the amount of information that reaches its server. For example, if you need to find a restaurant near you, Siri's servers may ask your iPhone to send them a more accurate location; if you want the service to read your email or SMS message, the remote portion of the system will simply delegate the task to the device itself, so that your private data never has to leave the confines of your handset or tablet.
Apple also outlines what it does with your data once it gets hold of it: Information like transcriptions and locations are discarded after ten minutes, while recordings are kept for a period of up to two years--after six months, however, they are scrubbed of all digital data that could be used to identify their source. Presumably, the company uses them to help improve its voice recognition software, particularly when it comes to non-standard words like proper names and music or movie titles.