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[Discussion] Face, Finger or Iris? Which Unlocking Method is Secure?

2019-07-14 14:42:27
1015 20

Hi Mi Fans,
I’m sure you’ve noticed that Android has a number of options aimed at making your device more secure. One of those is different methods to unlock the screen: pattern, PIN, password, iris scan and fingerprint, just to mention a few. Below, we’ll explain the goal behind each one and then you can choose the most practical and secure unlock method for you.

Facial Recognition
Facial recognition isn’t anything new. It first arrived on Android with the Ice Cream Sandwich version, also known as Android 4.0. This feature uses the front camera of the device to take a photo of your face and then it uses that photo as a baseline to unlock your device. It has a questionable level of security, with more cons than pros.

One of the biggest problems is that lighting has to be ideal for the front camera to be able to take a picture of your face. This all depends on the quality of the camera and how your face is placed in front of it. There’s a similar feature on the iPhone X, called Face ID, although the tech behind how it works it slightly differently.

Fingerprint Scanner

This is my favorite option and the one I currently use on my phone. Obviously, how well it works depends on a few factors, like the quality of the sensor and its placement. Quality, in this case, means the speed that the sensor reads your finger. This varies a lot between devices, as well as its scratch-resistant surface. There are certain biometric authentication mechanisms which become faster the more you use them.

As for the placement, I prefer it on the front bottom part of the display, next to the power button, like on the old Xperia line, which to me, is very practical. I’m not a fan of the ones on the back, which is more common today but it’s all subjective here.

As for security, this is probably the most secure method to date. That’s because it’s quite difficult for a fingerprint reader to be easily hacked. Furthermore, the sensors are developed to recognize body heat and blood movement of the user, which means you can’t use a “dead” finger to unlock an Android.

Iris Scanner
Like facial recognition, I’m still not convinced about using an iris scanner to unlock devices. It basically does the same thing as the fingerprint reader, and it requires the device to have a second, registered password in case you can’t get your phone unlocked. With the Galaxy S9 and Note9, the fingerprint and iris scanners cannot be activated at the same time. In other words, the second unlock method needs to be a PIN or an alphanumeric password.

Recognition varies according to lighting conditions and where the user’s eye is positioned. The better readers won't slow down when recognizing a user’s eye, even in low-light conditions. The system that scans your iris also needs to be fully integrated into the reader so it reacts quickly and can’t be hacked. Technically, this system is on par with the fingerprint reader in terms of security but loses out when it comes to usability.

Which method is best to unlock your Android?
The iris scanner, Smart Lock and facial recognition are all complimentary or secondary security methods, and as of right now, they aren’t good enough to be used as the sole method of protecting your phone. This means that you’ll have to register a PIN, pattern or password as your primary option. The iris scanner has another aggravating feature as well: restriction and availability. There are only a few models on the market right now that come with this feature.

The fingerprint reader is also a complimentary feature, but it’s a feature which is available on most mid-range models, and its usability is very attractive. It also has fewer recognition errors. Nevertheless, you can count on the more traditional options, which are also the most secure, since they don’t need a second layer of protection. In terms of both practicality and security, I’d stick with the PIN, password or pattern if I were you.

Which option do you use on your Android? Which do you think is the most secure?

Thanks to Admin@Elaine2046, S.Mod@raviki, S.Mod@sujayb, for continuous support and inspiration
Single Poll thread Total 63 Users Voted
12.7% (8)
68.25% (43)
19.05% (12)


Number of participants 1 Experience +20 Pack Reason

View Rating Log

2019-07-14 14:42:27
Favorites2 RateRate


ph.eliezer | from Mi 9 SE


Voted, thanks!
2019-07-14 15:11:01

Master Bunny

Ghedeon | from app


Finger is the fastest, the easiest and the safest!
2019-07-14 15:57:33

Master Bunny

Erdinçer | from MI MAX 2


Voted thanks
2019-07-14 17:34:15

Advanced Bunny

Subnux | from Mi 9 SE


voted ;)
2019-07-14 18:21:10

Beta Team-Global

Invisible_Mist | from Mi 9 SE


vote, thanks
2019-07-14 18:28:19

Advanced Bunny

1890047153 | from Redmi 6


password is the most secure
2019-07-14 18:42:04

Master Bunny

I'm Azman | from Mi MIX 2S


iris is secure, but the shootout from IR blaster gives strain to our eyes, makes it less preferable for security option
2019-07-14 19:28:22

Grand Master Bunny

Seragios | from Redmi 5


Voted, thanks!
2019-07-14 19:29:19


SandStorm_RS | from Redmi Note 5


Face can be tricked with a simple copy in paper of the owner face. Several phones suffer from that.
Finger is tricky. If the owner is sleeping, I can place his phone on his finger to unlock it.
Or if I want to steal, I cut his finger out.
Iris maybe is the most secure. Of course, someone who's a bit gore, can remove someone eye.
Nothing beats a memorised complex password.
I mean complex. Not the stupid easy ones.
2019-07-14 19:58:35

Master Bunny

NDaru.NDGOLL | from Redmi 5 Plus


Voted,@vaneet thanks
2019-07-14 19:58:58
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