One-time password (OTP) protocols and implementations (software and hardware)

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FIDO, U2F Compatibility

I've been following the FIDO standard (a consumer-friendly public-key system similar to SSH key pairs) and it appears that it's close to being complete: both Google and PayPal have been testing it ...
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1answer
50 views

Signup/Signin with Mobile+PIN

Telegram implements signup/signin with mobile number and a 5-digit one-time password. I believe the flow to be something along the lines of this: Grab the mobile number, generate an OTP, cache it ...
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1answer
190 views

Storage of the One Time Password Seed

I'm a student and I'm working on an OTP authentication systeme based on OATH using smart phones as tokens for the clients. My problem is the protection the OTP seed at both client and validation ...
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118 views

Generate secure one-time codes containing information

I need to create a system that allows a user to enter codes to charge an allowance. Embedded in this code should be the amount to charge the allowance. The user would pay for a code which would then ...
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43 views

Time Based Authentication

I need a way of authenticating that a file was generated by a particular machine that has a unique ID and a unique random secret also known to the authenticator, as an added difficulty the file ...
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0answers
46 views

What happens when authenticating through a phishing attack with FIDO U2F tokens

So I have looked around and haven't found this anywhere. What happens when the response server is a phishing site with FIDO U2F tokens? Basically, if login just fails, I would assume that the user ...
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87 views

Store 2-legged one-time password's key securely

I have a system with a OTP authentication and I need a method to encrypt the main "secret algorithm". In my system each OTP has a pair named "solution" and it is also changing like the OTP. I need to ...
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30 views

Negotiate n-bits key with Diffie-Hellman protocol (or other key exchange protocol)

I've got ASCII message. I convert it to binary - then I've got 8*(ASCII message length) bits - let us assume this value will be called n. I have to negotiate key, which length (after conversion to ...