How to enable System.Security.Cryptography for a WP 8.1 project?

Question

.NET

The project needs to use the HMACSHA1 class to encrypt a string in OTP. But I can't connect System.Security.Cryptography, for some reason the studio doesn't see it.
Is it possible to fix this, or is there a separate library for HMAC?
Thanks in advance!

Answer 1

stackoverflow.com/questions/24792142/hmacsha256-on...

Answer 2

You need to look at what error the studio produces, you may need to connect reference

Answer 3

if you are talking about MacAlgorithmProvider provider = MacAlgorithmProvider.OpenAlgorithm(MacAlgorithmNames.HmacSha256);
then you need to connect:
using Windows.Security.Cryptography;
using Windows.Security.Cryptography.Core;