How Things Work: Touch ID Fingerprint Sensor

What is touch ID?

Touch ID is a fingerprint recognition feature designed and released by Apple. It was first seen on an apple device when the iPhone 5s was released on September 20th , 2013. A lot of people don't realize that Apple's iPhone 5s was not the first mobile device to integrate  this technology, in fact, the Motorola Mobility Atrix 4G was back in 2011.

Welcome to how things work

This piece of hardware is made of Sapphire Crystal, which means it does not scratch. Around it is a stainless steel ring that detects the user's finger without having to press it. Touch ID will not work if the user does not make contact with outer ring.

Let's take a look underneath the Sapphire Crystal. This technology is known as capacitive sensing. This sensor is made of a dielectric material. It's an electric insulator that can be polarized by an applied electric field.

Here's how it works

When you touch the home button, all the positive charges in the dielectric material is attracted to the electric field your body produces. Picture this. When a finger is placed on the surface of Touch ID, the ring around the home button senses that it's there, that's when the 3D mapping of your fingerprint begins.

The protons in the dielectric material attracts to the electric field in the ridges of your finger and repels the electrons further. This is how the 3D mapping of your fingerprint is generated.
The more the end user uses Touch ID, the better the accuracy of the readings get overtime. But what if the Government gets a hold of one of these magical readings and frames me for a crime that I didn't commit? Well, then we're all fucked. No seriously, pack your bags and get a one way ticket to Canada. I'll see you there. But in all seriousness though the information gathered from the fingerprint sensor is stored in this stand alone chip which is separate of iCloud. So I'm sorry. A new season of Prison Break will not commence...... Right?

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Is Facebook Spying On You?

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A rumor surfaced of the giant corporation we all know and love known as Facebook is reportedly eavesdropping on every conversations you have in order to serve more relevant ads to you.

This is a big move on their part because the more relevant the ads are to the end user, the more money they can generate from these ads.

Facebook Denies The Allegations

The company claims that -

“Facebook does not use your phone’s microphone to inform ads or to change what you see in News Feed”. If I were to rob your home would you expect a call from me to let you know? I think not.

The statement was then followed by “This is not true. We show ads based on people’s interests and other profile information – not what you’re talking out loud about,”

THE TEST TO TELL IT ALL

Professor Burns tested this theory by setting her phone aside and strategically spoke on a specific topics around it, moments later she was served ads very relevant to what was said. Test it for yourself.

Download the messenger App from the App Store or Google Play, sign in, and talk about something you're familiar with, with the phone nearby. Share your experience down below.

Conclusion:

The signs are there. Do as you please with the information given here today.

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