Comment by yuliyp
5 days ago
I was responding to the statement at the bottom of the article: "however I have struggled to find a website that help me check my implementation as their secret-key representations were not standardized. Thus, I have published my own short demo app to showcase." The Google Authenticator QR codes end up being a fairly standardized secret key representation.
Even though QR codes are standardized, the original RFCs do not use QR codes. That's what I tried to mean, you can't find apps that use plain-text secrets.