It was supposed to be simple: set a camera to your phone, plug it in, record audio and video and send it to your home network.
But after installing HomeKit, you could set it to vibrate when you open the door, open a cupboard and check the locks.
And the more you listened to the recordings, the more the system could detect your mood and personality, according to security researcher Sebastian Maniscalco.
“There’s a lot of different things that we could do to get that system to recognise you, including being more confident or more outgoing,” Mr Maniscalca told BBC Radio 4’s Today programme.
“If we could get that information to the network, we could be able to recognise that the person on the other end of the phone is a stranger.”
In the US, HomeKit is already being used to remotely monitor the home of anyone with a smartwatch.
In the UK, there is also a HomeKit app available for phones and tablets, but it is only available in the US.
A HomeKit-equipped smartphone could also detect you by scanning your face for facial recognition software, allowing a person on your other end to unlock your home.
“A lot of this is really about social engineering, and the fact that the system is already able to do this is a reflection of how well-intentioned it is,” Mr Meniscalco said.
“It’s a very bad way to start any conversation.”
‘The biggest security risk’ With the rise of smartphones, and even more of them in the UK in the past couple of years, home automation has become more mainstream, even with a Homekit-equipped home connected to the internet.
And it seems the app is becoming more popular too.
“I think the biggest security concern right now is how people are interacting with home automation devices and how the technology is being deployed,” Mr Mascagni told the Today programme, adding that “many people are using the HomeKit system to spy on their neighbours, to monitor their activity.”
The HomeKit project is currently testing in New Zealand and Australia, but Mr Miscagni said the app would be open to anyone who wants to try it.
“People are getting connected to devices via HomeKit devices, so it is a little bit of a cross-platform platform, so we’ll be open-sourcing the Homekit app,” he said.
The project has also been welcomed by security researchers around the world, who have been quick to point out how easy it is to set up a HomeGuard system and set it up remotely, including by listening to audio recordings of a phone conversation.
“We’re happy that HomeKit can now be integrated with existing systems, and that HomeGuard can now become an application for home automation,” said Ben Ransom, head of security research at Sophos.
“With HomeGuard, you can control the home with HomeKit.
This is a very interesting new way of managing security at home.”
The company recently revealed that it had also started developing a Home Guard app for iPhones.
“When you enable HomeGuard in the Home app on an iPhone, HomeGuard will automatically connect with your HomeKit enabled device to provide a full suite of security services, including the ability to remotely activate and deactivate home automation systems and control security appliances,” the company said.
Mr Miscalco, however, said he was disappointed that Homeguard would be limited to US users, adding: “I’m glad HomeGuard is becoming available to anyone in the world and that we’re not restricting it to the US or the UK.”
You can read more about HomeKit and how it works here.