biometrics

问题 I have a custom usb based fingerprint recognition device. How can I associate the fingerprint on the device with the user of the Windows machine (Using CredentialProvider). Primarily, I want that upon fingerprint scanning automatic login should occur without any prompt for username/password. What I realise that there should be some registration process to bind fingerprint to the Windows user; but I am unable to find any technical resource in this direction. Thanks in advance. 回答1: You will

问题 we are currently trying to sign data with biometrics, which we use the androidx.biometric library for. The Problem is, if no Fingerprint ist installed but a face registered we cannot generate any keys. With Fingerprint only or with the combination of fingerprint and face everything works perfect. With only the face registered we get the following exception during key generation: Caused by: java.security.InvalidAlgorithmParameterException: java.lang.IllegalStateException: At least one

问题 we are currently trying to sign data with biometrics, which we use the androidx.biometric library for. The Problem is, if no Fingerprint ist installed but a face registered we cannot generate any keys. With Fingerprint only or with the combination of fingerprint and face everything works perfect. With only the face registered we get the following exception during key generation: Caused by: java.security.InvalidAlgorithmParameterException: java.lang.IllegalStateException: At least one

问题 we are currently trying to sign data with biometrics, which we use the androidx.biometric library for. The Problem is, if no Fingerprint ist installed but a face registered we cannot generate any keys. With Fingerprint only or with the combination of fingerprint and face everything works perfect. With only the face registered we get the following exception during key generation: Caused by: java.security.InvalidAlgorithmParameterException: java.lang.IllegalStateException: At least one

来源： https://stackoverflow.com/questions/63257762/how-to-save-and-compare-2-fingerprints-on-android

来源： https://stackoverflow.com/questions/63257762/how-to-save-and-compare-2-fingerprints-on-android

问题 I would like to perform windows domain authentication using kerberos (AS request) but all I have is a cardID provided by client. I do have username but no password. How to validate the card user as kerberos needs username and password. Any mechanisms to validate card ID using kerberos mechanism on windows 2012/2016 server ? 来源： https://stackoverflow.com/questions/61769720/kerberos-authentication-for-validating-card-id-on-windows-2012-2016-server

问题 The documentation of BiometricPrompt.PromptInfo 's setDeviceCredentialAllowed method states: [...] Developers should first check KeyguardManager.isDeviceSecure() before enabling this. If the device is not secure, BiometricPrompt.ERROR_NO_DEVICE_CREDENTIAL will be returned in BiometricPrompt.AuthenticationCallback.onAuthenticationError(int, CharSequence). https://developer.android.com/reference/androidx/biometric/BiometricPrompt.PromptInfo.Builder.html#setDeviceCredentialAllowed(boolean)

问题 The documentation of BiometricPrompt.PromptInfo 's setDeviceCredentialAllowed method states: [...] Developers should first check KeyguardManager.isDeviceSecure() before enabling this. If the device is not secure, BiometricPrompt.ERROR_NO_DEVICE_CREDENTIAL will be returned in BiometricPrompt.AuthenticationCallback.onAuthenticationError(int, CharSequence). https://developer.android.com/reference/androidx/biometric/BiometricPrompt.PromptInfo.Builder.html#setDeviceCredentialAllowed(boolean)

问题 How can I do a basic face alignment on a 2-dimensional image with the assumption that I have the position/coordinates of the mouth and eyes. Is there any algorithm that I could implement to correct the face alignment on images? 回答1: Face (or image) alignment refers to aligning one image (or face in your case) with respect to another (or a reference image/face). It is also referred to as image registration. You can do that using either appearance ( intensity-based registration ) or key-point