one-time-password

Anyone know where I could find sample code for this with system.security.cryptography namespace -- or instructions followable by a developer? The purpose is to add two-factor authentication to an asp.net website. On website I want to ask user to enter a passcode (similar to if they got it from a keyfob). On the client side I want to provide a vb.net windows.forms program that generates the correct passcode. I want to do this with system.security.cryptography namespace on a small scale. I was looking for sample code I don't want to mess with devices or purchase authentication server appliances.

I have seen this link Two Factor Auth using goolgle authenticator on how to create a two factor authentication in web api, but my requirements are little different. I want to use two factor authentication for issuing an access token. (If the user has chosen to enable two factor authentication) I would like to create the OTP code using ASP.NET identity itself. (Like the way we do in MVC web application SignInManager.SendTwoFactorCodeAsync("Phone Code") The problem with my current implementation is, when I call SignInManager.SendTwoFactorCodeAsync("Phone Code") I get the error user id not found.

This question already has an answer here: iPhone application – reading SMS 3 answers I am working on an internet trading application with its mobile and iPhone applications available. With the recent market trend, we are working on including two-factor authentication. For that, we will be sending a one-time password as a sms on user's registered mobile number. Is there a way,that the OTP can get automatically populated into application from user's message box in iPhone? What algorithm should I use to make my app read user's message box? Thanks in advance:) Charan Giri You can Access SMS from

I want to implement OTP functionality in my android application. In this application, after signup user will receive one time password key . After verifying OTP , user will be able to register/open account successfully by using that OTP. What i need to do achieve this? Check google authenticator. https://code.google.com/p/google-authenticator/ it is open source project with OTP functionality Source code for android app https://code.google.com/p/google-authenticator/source/browse/?repo=android Here is source code for server side https://github.com/chregu/GoogleAuthenticator.php Wikipedia

Is there any way to access data from iPhone inbox(SMS) to ios application to do automatic OTP verification like the one in Android? I shall be grateful for your help. In iOS 12 Apple has introduced feature called Security Code AutoFill . To use this in your app all you need to do is set UITextField 's input view’s textContentType property oneTimeCode . otpTextField.textContentType = .oneTimeCode NOTE : Security Code AutoFill will only works with System Keyboard it will not work with custom keyboard. WWDC video When you get OTP it will look something like this: UPDATE From iOS 12 Apple will

I am trying to use one-time passwords that can be generated using Google Authenticator application . What Google Authenticator does Basically, Google Authenticator implements two types of passwords: HOTP - HMAC-based One-Time Password, which means the password is changed with each call, in compliance to RFC4226 , and TOTP - Time-based One-Time Password, which changes for every 30-seconds period (as far as I know). Google Authenticator is also available as Open Source here: code.google.com/p/google-authenticator Current code I was looking for existing solutions to generate HOTP and TOTP