The Galaxy S7 and LG G5 may have iris scanners, so what does that mean for you?

We are due for two highly important smartphone announcements – the Samsung Galaxy S7 and the LG G5. Among all the things that make them special are the substantial rumors that both will feature eye scanning security, kick-starting the post-fingerprint sensor era of Hollywood-level biometrics security coming to devices for the everyday consumer. Truth be told, this is something we've been hearing years before, all the way back when the Samsung Galaxy S5 and the LG G3 still inspired all sorts of brave predictions. However, mobile eye scanning is already a reality, and we actually have leaked information of such value as to give the rumors some credibility for a change.

Thus, for the first time in smartphone rumor-mongering history, we think that eye scanning security on the Galaxy S7 and the LG G5 might be for real! But more on that later. Right now, we reckon you might have a few questions. Is this eye scanning thing going to be a game changer, a lowly gimmick, or something in between? What does an iris scanner do and how does it do it? Do we really need such gizmos when fingerprint scanners seem perfectly good already? We'll try to answer these and give you everything we think you should know!


Although most people may have missed this fact, iris scanners have been available in a number of smartphones from last year. The Microsoft Lumia 950 & 950 XL are the most recent example, but months before, we already had the Fujitsu NX F-04G (sold in Japan), the Vivo X5Pro and ZTE Grand S3 (sold in China), and other handsets that are relatively obscure to non-Asian audiences.

With that said, iris scanners are still a novelty, because only a small number of smartphones have them, and for one reason or another, none of them are widely known to global consumers. But the technology is readily available, and as is the case with even the most bulletproof components, it's up to smartphone manufacturers to make the best of them with good engineering and solid algorithms. Being big and influential brands, we don't expect Samsung and LG will ship half-baked iris scanners on their "hero" phones. At worst, we expect an experience matching that of the newest Lumia handsets, which isn't prime for replacing the fingerprint scanner (but probably good enough to supplement it in some way).

Now, let's dig a little deeper and understand what is it that gives your eyeballs their magical smartphone-unlocking abilities!

How it works

So far, smartphones have seen two types of eye scanners. The Lumias and the Fujitsu, for example, have an IR light and an IR camera on the front, in addition to their normal selfie cameras. The IR light is generally invisible to the naked eye (but you do see the IR emitter appear as a red dot on the phone) and lets the process work regardless of the lighting conditions. After setting up a PIN unlock in case iris scanning fails, you bring the phone to your face, the IR LED lights up the iris patterns in your eyes, and a photo of them is taken by the IR front camera. Then, the software part of the equation kicks in. First, a hash code gets mathematically generated from the IR photo of your iris patterns. Each time you reach to unlock your smartphone, it scans your iris patterns and generates a hash code, which gets compared to the one extracted from the original iris pattern photo. If the two strike a match, the device gets unlocked.

All of this complicated math is cranked out in just a second or two, which is a testament to how powerful mobile processors have become. The encryption in use is your standard asymmetric cryptography scheme, in which a pair of keys is used to encrypt and decrypt a piece of information. Also, with high-quality iris scanners, it should be only the hash code that's present on your device. No photographs or other types of easily exploitable information are meant to remain in memory, or get transmitted between servers.

The second implementation, developed by Kansas City biometrics startup EyeVerify, works in much the same vein, but omits the IR light. Technically, its Eyeprint ID method doesn't scan the iris, but the patterns of blood vessels in the sclera (the whites of the eye), as well as other micro-features. Thus, it's able to do its thing with just the smartphone's front cam, but this simplicity may warrant some unwelcome trade-offs. For example, we're not sure how good the implementation fares in challenging light conditions without the IR LED. Moreover, the Vivo X5 Pro, which uses this technology, can take up to 20 uncomfortable seconds of holding your smartphone at eye level to register the patterns, and over 5 seconds to unlock, which sounds terrible.

Samsung's and LG's plans

Which method will Samsung and LG utilize? We can't say for sure, but we have some clues. Samsung is an investor in EyeVerify, and back in September 2015, journalists unearthed a patent for an iris scanner system which uses near-infrared rays to recognize blood vessel patterns in eyes and software algorithms to encrypt them. The system uses a light source to illuminate your eyes and a light receiver to process the reflected light from the eyes. Inevitably, there's lots of ambient light and reflections of objects to stand in the way of proper functionality, thus multiple reflections are captured at different angles and compared as to filter out excess information. A final image is assembled and a hash code is generated from it, as per the standard procedure we described above.

As for LG, we read a number of times that the company is working with fellow Korean firm Irience on developing an iris scanning module and algorithms for the upcoming LG G5. Last we heard, work on the hardware module is complete and the two are polishing the software to increase the recognition range from 12in (30cm) to a cool 20in (50cm). Irience's proprietary technology isn't fully detailed, but it has been in development for more than 15 years. Hopefully, LG and Irience have been meticulous and striving for greatness, rather than rushing towards a deadline.

Meanwhile, you should really check these out:

The user benefits

Here are some questions that may have popped up in your head as you read this. Why go the iris scanning route when we already have a safe, quick and reliable solution to guarding our data — fingerprint scanners? Doesn't the presence of military-level security tech on devices most of us use for casual communication seem a tad overkill? The fundamental answer to both is that protecting your personal data is important, and iris scanning could eventually become a safer, contact-less solution.

Eye recognition is non-contact, which brings forth some welcome advantages. Bearing close contact with our digits, fingerprint scanners easily get dirty and sometimes fail to function. An iris scanner is free of such problems and is also immune to the sort of tricks your children, friends, and jealous significant others can play on you — lightly touching your locked smartphone to your finger as you're asleep, and getting away with your most personal device.

However, it's going to take a while before eye scanning achieves the sheer convenience of a properly implemented fingerprint reader. The one on the Lumia 950 & 950 XL is the most advanced on the market, and at present, it's unable to stand up to fingerprint security's comfortable, refined operation. Rather than simply reaching for your phone, you must hold it against your eyes at an unnaturally close distance. Two times out of three, the scanner won't identify your stare if you're not looking at it directly, but at an angle. These shortcomings make for a significantly slower, cumbersome user experience compared to present fingerprint readers.


Our experience with the Lumia 950 & 950 XL's iris scanners has convinced us that present fingerprint readers are faster and more convenient than holding your smartphone at a specific eye level and staring at its camera at a narrow viewing angle. The iris scanner isn't merely a gimmick, though. When perfected, it could make your smartphone a somewhat safer and more immediately unlockable device than the fingerprint reader. And even though it's not the kind of game changer that will render smartphone dactyloscopy obsolete, it's nevertheless a super cool thing to have!

At present, eye scanning is no competition for the fingerprint scanner's combination of immediacy and level of security. Thus, we think a combination of both will be ideal, as you will get to decide between two advanced, strongly secure methods according to your preferences. Maybe you'd like to use the iris scanner for unlocking and the fingerprint reader to authorize payments, or vice-versa, depending on your surroundings. We're certainly looking forward to how Samsung, LG, and other manufacturers may implement and further refine eye scanning technology. If, of course, they choose to adopt it in their upcoming flagships.

Related phones

Galaxy S7
  • Display 5.1" 1440 x 2560 pixels
  • Camera 12 MP / 5 MP front
  • Processor Qualcomm Snapdragon 820, Quad-core, 2200 MHz
  • Storage 32GB + microSDXC
  • Battery 3000 mAh(28h 3G talk time)
  • Display 5.3" 1440 x 2560 pixels
  • Camera 16 MP / 8 MP front
  • Processor Qualcomm Snapdragon 820, Quad-core, 2200 MHz
  • Storage 32GB + microSDXC
  • Battery 2800 mAh(25h talk time)



1. shield

Posts: 892; Member since: Sep 12, 2015

2. BradyCrack

Posts: 835; Member since: Dec 29, 2015

I think it's pretty ugly. Of cause these are renders, but they look very boring, quite similar to an iPhone 6 as well. I don't think LG is LG without the leather or back buttons.

19. DoggyDangerous

Posts: 1028; Member since: Aug 28, 2015

I think LG will remain LG without leather or back buttons. They will not become MG without these

4. MarinoVladimir

Posts: 41; Member since: Aug 04, 2014

It's fine.


Posts: 334; Member since: Mar 24, 2015

Wait I thought it was coming with a ticker display?


Posts: 334; Member since: Mar 24, 2015

And back buttons.

20. DoggyDangerous

Posts: 1028; Member since: Aug 28, 2015

No ticker display plz. It is a wastage of phone form factor

3. BradyCrack

Posts: 835; Member since: Dec 29, 2015

finger print sensors were a gimmick, but got awesome. 3D Touch is a gimmick, but will be awesome. Eye scanning is a gimmick, but without a doubt will be awesome! Hope the G5 gets one.

6. ibend

Posts: 6747; Member since: Sep 30, 2014

even touchscreen itself is a gimmick on early 2000's, its slow to do everything, terrible to use for typing, bad battery life, no its far better.. (and I hope dual camera can be awesome as well :-/ )

12. vincelongman

Posts: 5814; Member since: Feb 10, 2013

Hopefully Google replaces face unlock with iris instead, so all newer phones can have iris unlock It would be great for when fingers are covered, e.g. gloves

5. Shocky unregistered

Iris scanners will definitely be secure which business users will like, for general users though it's going to be slow and depend on lighting. same reason nobody uses face recognition.

7. ibend

Posts: 6747; Member since: Sep 30, 2014

face recognition is simply flawed, human face isnt as unique as iris or fingerprint.. and some old news said that you can unlock face recognition using owner's photo :-/

21. Plutonium239

Posts: 1262; Member since: Mar 17, 2015

Not with Intel's new cameras you can't.

9. celinedion

Posts: 44; Member since: Jan 19, 2016

If u had tried knockcode and mastered it, well, it's so great to even think about it


Posts: 202; Member since: Dec 08, 2012

The main question is - will the scans stay on the device?

11. artificialintelligence

Posts: 166; Member since: Dec 05, 2015

it means skynet

15. Gemmol

Posts: 793; Member since: Nov 09, 2011

Lumia 950 unlocking got faster with the new updates that they send out, and you do not have to worry about lighting, you can record your eyes in many different positions and you can unlock it with glasses on or even in pitch dark room, I like it better then the finger print because at least I know, someone cannot open my eyes to unlock my phone easily when you really tired

16. SenorThrottles

Posts: 284; Member since: Dec 23, 2015

What if you're trying to unlock the phone when it's pitch black?

22. Plutonium239

Posts: 1262; Member since: Mar 17, 2015

It works just fine, there is an infrared LED on the front to illuminate your eye if there isn't any or enough in the room you are in. I have has 0 issues with mine.

17. TechieXP1969

Posts: 14967; Member since: Sep 25, 2013

Well it appears gimmicky to me, no matter how useful someone can make it. Here is the problem which you already stated. It's never goign to be as fast as a fingerprint reader, or how fast someone can type a 4 digit pin code or maybe even type their long passwords, as long as it doesn't have complicated symbols. Is it more secure? It could be. If you cu off someone finger, or even if they are dead, as long as the body is fair warm, you can still get a fingerprint. This may also be true of an eyeball. However, suppose a person typically has bloodshot eyes? Well if they are dead, their eyes may not be bloodshot anymore, so you wouldn't be able to unlock the device. It seems gimmicky because other than the thrill factor of saying I have it and you don't, it is basically a useless feature. It would be a nice toy to play with for a few days. But after the novelty wears off in a few hours, or after the frustration of not being able to get it to consistently work, people will just go back to the tried and true.

23. Plutonium239

Posts: 1262; Member since: Mar 17, 2015

The eye is always moving when it is alive, the iris is always expanding and contracting, a dead eye does not do this. Also, its nice to be able to pick up my phone and it unlocking without me even touching the screen, it unlocks faster than I can start typing in my pin(most of the time anyways).

18. yonith

Posts: 230; Member since: Sep 11, 2012

What does it mean for me? It means something else to disable to save battery and precious CPU cycles.

24. JumpinJackROMFlash

Posts: 464; Member since: Dec 10, 2014

As long as it works flawlessly and is fast it would be great, I don't see a disadvantage then. My Note 4 fingerprint scanner sucks (you have slide your finger). But it has to be 100% and fast - no 20 seconds of waiting or getting a perfect angle over and over again.

25. timtim

Posts: 1; Member since: Jun 07, 2016

Come on everyone.....wake the hell up! Iris scanning is extremely intrusive. It allows "anyone" with the proper technology, (cell phone carriers, advertising conglomerates, Private Investigators, and yes even the Government) a definitive way to identify "you" as the immediate user. Even the US government classifies iris scanning as; “Target Recognition”. They will know definitively the content “you” as an individual sends in an email, what web sites you browse, and what you text. They are able to tell who you are, where you are, what your kids are doing, and what you are saying. Listen, you wouldn't give this personal information to a perfect stranger, but that's precisely what you'd be doing 24 hours a day with iris scanning. Common sense should tell you that cell phone companies are voluntarily investing millions of dollars in technology just to ensure that someone else doesn't use your phone? Think about it.

26. icisz

Posts: 3; Member since: Nov 04, 2016

Agreed 100%. People are in such a hurry to just accept features at face value but seriously: The idea of being a human beta test for this laser being aimed at your eyes? I am absolutely intregued by this technology despite the fact that Samsung has never been my favorite company. Regardless: as far as the magnetic nature of future forever drawing us in, somehow the combined invasive nature of the scan, the obvious privacy issues that may or may not be observed, or eventually hacked... and finally the very possible risk of long term harm to your eyes. Features are great if they work well and solve a problem that needs solving, but this feels more redundant than something that fits a specific need imo. It simply is not something I would want to do each time I lift my phone up. Guess we will learn more when the s8 "launches".

27. icisz

Posts: 3; Member since: Nov 04, 2016

After some very light research I have read some more info and the consensus seems to push towards NIR led being safe for human eyes. The analogy of it being not much different than "a day

28. icisz

Posts: 3; Member since: Nov 04, 2016

In the sun", still raises concerns for me at least, but this technology should not be confused with retinal scans. Very interesting indeed, and if it adds another layer of encryption to certain account access points, assuming the user can pick and choose those points, it certainly can't be a bad thing. I still feel compelled to want to know more about the enclave used to store this sensitive information, and the risks of such information being exposed to those with malicious intent. Still no question that we will see more and more of this kind of tech as time evolves, but much like my DNA, I want assurances that this kind of data is mine to control and nobody else's. At this stage of the game it is hard to trust any device manufacturer with that much intimate knowledge about "me"

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