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Questions tagged [biometrics]

Biometrics is a set of methods related to unique identification of people based on physiological or behavioural traits

Biometric recognition is the process of recognizing a person's identity by analyzing some data derived from their body (physical traits, like fingerprint, iris or face) or behaviour (like gait or, to some extent, voice).

The Wikipedia page on Biometrics has more complete information.

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How to get user photo from zkteco?

im doing an app in c# using a biometric device. From the device I already can get the id,time,date,etc... But I didnt found a way to get the photo and the name and I know its possible. Ive been searching for a while and i found a similar question…
Rubs Bieira
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Why does my app works on my computer but not on others

im doing an app in c# windowns form that register the entries of the employees with a biometric device. I did a setup and send to my other computer to test if it would work on another device. Everything works fine except the functionalities that…
Rubs Bieira
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Face authentication using React native keychain in Android

I'm trying to set and get data using react native keychain library with below options: accessControl: ACCESS_CONTROL.BIOMETRY_ANY, accessible: ACCESSIBLE.WHEN_UNLOCKED I was successfully set the data. When I'm trying to retrieve data using…
Milan savani
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Android - Biometrics on Android 9 (SDK 28) - Phone has face recognition available but BiometricManager returns null

I am adding Biometrics to my app for when its available on the device. I am using a Samsung phone running Android 9... the phone has face recognition and I have my face registered. The issue is, when i use BiometricManager.canAuthenticate() to ask…
RH201
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Failed to generate key pair on Samsung S20, S20+ and S20 Ultra for biometric auth

We have an issue with Samsung S20, S20+ and S20 Ultra devices when trying to generate a keypair upon enrolling in fingerprint auth in my app. We are only seeing this issue on the new Samsung S20 family with the Exynos chipset (International model)…
Chief.Rabbids
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fingerprint verification

i am doing my final year proj in fingerprint authentication. i 've completed binarization, thinning, minutiae extraction. i am doing it in matlab. i am stuck with the verification. i don't know how to perform verification. so please help me out to…
Raj
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BiometricPrompt: Why should we check KeyguardManager.isDeviceSecure() before enabling setDeviceCredentialAllowed?

The documentation of BiometricPrompt.PromptInfo's setDeviceCredentialAllowed method states: [...] Developers should first check KeyguardManager.isDeviceSecure() before enabling this. If the device is not secure,…
Florian Walther
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How to check what biometrics are supported on API level 28+?

I want to check what biometrics are supported on Android devices with API level 28+ to be able to to show relevant text to the users. E.g. "Log in with Fingerprint", "Login with Face", "Login with Iris", "Enable Fingerprint login", "Enable Face…
Mario Kutlev
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Why iOS display a permission alert only for FaceID?

When I implement FaceID, I set on Info.plist the FaceID Usage Description, hence, everytime an user tries to use FaceID for the first time, iOS displays a prompt asking about FaceID permission. But, I'm not sure why if I use Touch ID, a similar…
Ricardo Isidro
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On iOS 13 the biometric authentication alert does not show on older phones

On older iPhones such as the 6, 6s etc. The biometric authentication dialogue/alert is hidden. If you press the home button on the iPhone to authenticate via a fingerprint it still works, but the dialogue/alert is hidden, which is a source of…
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AndroidX biometrics force fingerprint

Is it possible to force the AndroidX biometrics library to make use of fingerprint, rather than other mechanisms? Right now, some Samsung devices are forcing our app to use Iris instead of fingerprint, even if the user prefers fingerprints
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Fingerprint BiometricPrompt on android P from a View

I am using FingerprintManager to authenticate my app with fingerprint. I have and android View with the fingerprint ui and when the FingerprintManager.authenticate callbacks are called I handle the callbacks in the view, e.g change fingerprint icon,…
BennyP
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What does [unowned self] mean and what are the benefits?

I´m trying to integrate Face/Touch ID Login and I saw [unowned self] in Apple's documentation, inside a closure. What is that and what are the benefits? Example code: let context = LAContext() var error: NSError? if…
SwiftiSwift
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Android BiometricPrompt.Builder.authenticate() not showing any dialog

This is my code to show the prompt for fingerprint authentication in Android P: private void displayBiometricPrompt() { DialogInterface.OnClickListener onClickListener = new DialogInterface.OnClickListener() { @Override public…
user10769046
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Request permission to use Face ID/Touch ID programmatically

Is there a way to request permission for Face ID/Touch ID programmatically? I know that permission for Face ID is triggered the first time you call evaluatePolicy(_ policy: LAPolicy, localizedReason: String, reply: @escaping (Bool, Error?) ->…
TheRealRonDez
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