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

Apple Shopping Event 2025

Apple Announces 2025 Black Friday Event, Here's What You Can Get

Thursday November 20, 2025 6:28 am PST by
Apple's annual four-day Black Friday through Cyber Monday shopping event is returning on Friday, November 28 through Monday, December 1 in many countries, including the United States, Canada, Australia, New Zealand, France, Germany, Italy, Spain, the United Kingdom, Belgium, the Netherlands, Sweden, Thailand, and others. During the shopping event, customers can get an Apple gift card with...
applecare apple care banner

Apple Brings New AppleCare+ Options to India

Tuesday November 18, 2025 8:42 am PST by
Apple today announced an expansion of AppleCare+ coverage in India, with new options for monthly and annual plans, and the addition of Theft and Loss for iPhone for the first time. Options for monthly and annual AppleCare+ plans in India provide more choice and flexibility, allowing users to keep coverage for as long as they require. Apple's vice president of Worldwide iPhone Product...
iOS 26

Everything New in iOS 26.2 Beta 3

Monday November 17, 2025 3:20 pm PST by
Apple provided developers with the third beta of an upcoming iOS 26.2 update, and there are still new features that are being added with each beta that we get. We've rounded up all of the changes that Apple made in beta 3. AirDrop Apple added new AirDrop functionality, providing a way for two people to share files temporarily without having to add one another as contacts. iOS 26.2...
iPhone 17 Pro Cosmic Orange

10 Reasons to Wait for Next Year's iPhone 18 Pro

Wednesday November 19, 2025 4:00 am PST by
Apple's iPhone development roadmap runs several years into the future and the company is continually working with suppliers on several successive iPhone models at the same time, which is why we often get rumored features months ahead of launch. The iPhone 18 series is no different, and we already have a good idea of what to expect for the iPhone 18 Pro and iPhone 18 Pro Max. One thing worth...
ipad mini 7 feature red and blue

iPad Mini 8: Four Major New Features to Expect

Wednesday November 19, 2025 7:50 am PST by
Apple's eighth-generation iPad mini is highly likely to arrive next year, offering a significant refresh of the device with at least four major new features. OLED Display The next-generation version of the iPad mini could feature an OLED display, as part of Apple's plan to expand the display technology across many more of its devices. Apple's first OLED device was the Apple Watch in 2015, ...
Apple Wallet ID Illinois

iPhone Driver's License Feature Launching in Illinois

Tuesday November 18, 2025 8:47 am PST by
In select U.S. states, residents can add their driver's license or state ID to the Wallet app on the iPhone and Apple Watch, providing a convenient and contactless way to display proof of identity or age at select airports and businesses, and in select apps. Starting this Wednesday, November 19, the feature will be available to residents of Illinois. The announcement confirmed that the...
iPhone 17 Pro and Air N1 Feature

iPhone 17 vs. iPhone 16 Wi-Fi Speeds: New Study Reveals the Winner

Tuesday November 18, 2025 10:53 am PST by
A new study has revealed that the iPhone 17, iPhone 17 Pro, iPhone 17 Pro Max, and iPhone Air achieve significantly faster average Wi-Fi speeds compared to the iPhone 16 series, thanks to Apple's custom-designed N1 chip. The study was conducted by Ookla, the company behind the popular Speedtest website and app. It said the results are based on global, crowdsourced Speedtest user data...
macbook black friday

The Best Early Black Friday Mac Deals

Tuesday November 18, 2025 7:32 am PST by
We're getting closer to Black Friday, which lands next week on Friday, November 28. In the lead-up to the shopping holiday, we're tracking a few lowest-ever prices on Apple's most popular Macs, including the M4 MacBook Air and brand new M5 MacBook Pro. Note: MacRumors is an affiliate partner with some of these vendors. When you click a link and make a purchase, we may receive a small payment,...
Magic Keyboard Touch ID Feature

Apple Releases New Firmware for 140W USB-C Power Adapter, Magic Keyboard and Magic Trackpad

Tuesday November 18, 2025 1:05 pm PST by
Apple today released updated firmware for several accessories, including the 140W USB-C Power Adapter, the Magic Trackpad 2, the Magic Trackpad USB-C, the Magic Keyboard with Touch ID, and the Magic Keyboard with Touch ID and Numeric Keypad. There is no word on what's included in the updated firmware at this time, but it could offer performance improvements and security updates. Accessory...
watchos 26 workout app

Apple Watch Users Claim Workout App Is Now Worse in Every Way

Thursday November 20, 2025 7:01 am PST by
Apple Watch owners have been voicing their frustration online over changes to the Workout app that Apple introduced in watchOS 26, with many finding the redesigned interface makes starting exercises difficult and exasperating. When Apple launched watchOS 26 in September, the Workout app went from large, easily tapped workout tiles to a scrolling, corner-button interface. Instead of tapping a ...

Top Rated Comments

Fondaparinux Avatar
159 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
159 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
159 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
159 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
159 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
159 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)