More Details on How the Touch ID Fingerprint Sensor Works

The flagship feature of the iPhone 5s is the new Touch ID fingerprint sensor, and we're beginning to get a better idea of how it works.

Touchid
It appears Apple has designed Touch ID to be faster than entering a four-digit passcode, stating in its marketing materials that using Touch ID is "faster, easier, and even a little futuristic". It will allow users to store up to five fingerprints, allowing other trusted users access to a locked phone.

Put your finger on the Home button, and just like that your iPhone unlocks. It’s a convenient and highly secure way to access your phone. Your fingerprint can also approve purchases from iTunes Store, the App Store, and the iBooks Store, so you don’t have to enter your password. And Touch ID is capable of 360-degree readability. Which means no matter what its orientation — portrait, landscape, or anything in between — your iPhone reads your fingerprint and knows who you are.

Financial Times reporter Tim Bradshaw shared this video showing how the iPhone learns a fingerprint by scanning a finger a half-dozen times.


TechCrunch wrote that once a fingerprint was successfully learned, "it worked flawlessly to unlock the device for every subsequent trial."

Also, AllThingsD reports that third-party developers will not get access to the fingerprint authentication protocol, at least not initially.

The iPhone 5s will cost $199, $299, and $399 for the 16 GB, 32 GB, and 64 GB models respectively with a 2-year contract. Non-contract, unlocked devices will be available at launch for $649/$749/$849.

The iPhone 5s and the lower-cost iPhone 5c -- which does not have Touch ID -- will be available in stores in the US, Australia, Canada, China, France, Germany, Japan, Singapore, and the UK starting on September 20.

Notably, there will be no preorders for the iPhone 5s.

Related Forum: iPhone

Popular Stories

iOS 26 on iPhone Feature

Here's When iOS 26 Rolls Out Today in Every Time Zone [Update: Out Now!]

Monday September 15, 2025 12:00 am PDT by
Update 10:06 a.m.: iOS 26 is rolling out now, though it may take a bit for all users to see it, so keep checking! Today's the day! Apple is about to release iOS 26, which will deliver the biggest redesign since iOS 7 and bring a range of new features and improvements to iPhones worldwide. It's Apple's biggest software update of the year, and Apple announced at last week's iPhone event that...
Tim Cook Rainbow

Apple Reportedly Plans to Launch These 10 Products in 'Coming Months'

Sunday September 14, 2025 8:45 am PDT by
Apple's annual September event is now in the rearview mirror, with the iPhone 17, iPhone 17 Pro, iPhone 17 Pro Max, iPhone Air, Apple Watch Series 11, Apple Watch Ultra 3, Apple Watch SE 3, and AirPods Pro 3 set to launch this Friday, September 19. As always, there is more to come. In his Power On newsletter today, Bloomberg's Mark Gurman said Apple plans to release many products in the...
iOS 26 Battery Glass Feature

Apple Says Installing iOS 26 Might Impact Battery Life

Monday September 15, 2025 10:56 am PDT by
In the iOS 26 release notes, Apple is warning iPhone users that installing the new software might have a temporary impact on battery life, which is normal. A new support document explains that major iOS updates require background setup like indexing data and files for search, downloading new assets, and updating apps. Further, Apple says that new features could require more resources,...
AirPods Pro Firmware Feature

AirPods Pro 2 and AirPods 4 Get iOS 26 Features With New Firmware Update

Monday September 15, 2025 10:50 am PDT by
Apple today released updated firmware for the AirPods Pro 2 and the AirPods 4, introducing support for the new AirPods features that are included in iOS 26, iPadOS 26, and macOS Tahoe. The firmware has a build number of 8A356, and it replaces the current 7E93 firmware. With Apple's new software updates, the AirPods Pro 2 and the AirPods 4 support better audio quality for phone calls and...
iphone 17 lineup

iPhone 17 Models Launch on September 19 With These New Features

Friday September 12, 2025 7:58 am PDT by
Apple will launch its new iPhone 17 lineup and ultra-thin iPhone Air in stores on Friday, September 19, and the company has already shown off the new devices at its fall event, which ran with the the tagline "Awe dropping." The iPhone 17 series brings a host of new features and enhancements. Here's a rundown of the biggest upgrades and changes: iPhone 17 Display Changes The iPhone...
apple n1 chip

Apple's New N1 Chip in iPhone 17, iPhone 17 Pro, and iPhone Air Has a Wi-Fi 7 Limitation

Saturday September 13, 2025 10:01 am PDT by
The latest iPhone 17, iPhone 17 Pro, iPhone 17 Pro Max, and iPhone Air models are equipped with Apple's all-new N1 chip for Wi-Fi 7, Bluetooth 6, and Thread connectivity. However, the chip has a Wi-Fi 7 bandwidth limitation. According to FCC documents reviewed by MacRumors, the N1 chip in all of the new iPhone models supports up to 160 MHz channel bandwidth for Wi-Fi 7, short of the...
iPhone 17 Pro Air Boxes

iPhone Air and iPhone 17 Pro Boxes Revealed

Sunday September 14, 2025 1:36 pm PDT by
T-Mobile President Jon Freier today shared real-world photos of Apple's boxes for the iPhone Air, iPhone 17 Pro, and iPhone 17 models, which launch on Friday. Image Credit: Jon Freier Apple has typically included iPhone box renders in its product environmental reports, but it did not do so for the latest models. However, Apple's iPhone Upgrade Program page does offer some images of the boxes, ...

Top Rated Comments

Fondaparinux Avatar
157 months ago
If somebody chops off your finger, can they use it to unlock your iPhone?
If someone chops off your finger, I think you have a bigger problem than your phone.
Score: 41 Votes (Like | Disagree)
SHirsch999 Avatar
157 months ago
Also:
https://twitter.com/mcdev/status/377491907653693440
"Jealous spouses are going to love the new 5s. Wait until the other one falls asleep, carry the phone over, unlock it and snoop away!"

I already know my wife's code and she knows mine. Don't give your spouse a reason to be jealous and this won't be a issue.
Score: 23 Votes (Like | Disagree)
Gooberton Avatar
157 months ago
I for one love the sensor, I love the whole 5S, seems like people are haters on it. What did you expect? It's pretty darn cool!
Score: 23 Votes (Like | Disagree)
lusky Avatar
157 months ago
Yeah - why are implementing something so potentially risky? You mention you doubt it will ever happen - that's naive - it can and will happen in many places around the world. A finger is nothing! They mug people for kidneys everywhere - even places like Manchester, UK - they wouldn't even think twice about taking someone's finger.

Furthermore if they do implement it in cars, house doors, etc. - people are going to be getting their fingers stolen all over the place in all countries. This is crazy. I guess we'll just have to thank our lucky stars they're not implementing retina scanners.

Dear god as someone has all ready said, it detects temperature and plus, a severed finger or a print of your print is no use. stop panicking.

PS have you finished building your underground bomb shelter?
Score: 17 Votes (Like | Disagree)
PsychoLogicXen Avatar
157 months ago
Future breaking news story: Man knocked unconscious by thief. Thief steals man's iPhone only after using man's finger to unlock it. Man sues Apple.
Score: 15 Votes (Like | Disagree)
bandalay Avatar
157 months ago
The image it reads is the subcutaneous 3-dimensional shape of your fingerprint's ridges. Your fingerprint alone does not have these features.


Oh Apple, why would you blunder so? Fingerprints are not passwords, let alone the perfect password. Touch ID -- identification -- yes, fantastic. Authentication? No. Everything you touch now has your "secret" password on it, and it bears mentioning that changing such a password is... difficult.
Score: 8 Votes (Like | Disagree)