Google Authenticator on Apple devices, certain secrets are not valid

Question

We\'ve incorporated two factor authentication into one of our applications using Google Authenticator. In QA, something really weird turned up. While I managed to fix it,

Answer 1

It is not only the key lenght that is important

Here is how a sample URI should look like: otpauth://totp/Example:alice@google.com?secret=JBSWY3DPEHPK3PXP&issuer=Example

In your case, there is no "issuer" or "accountname" in the URI, both are recommended.

PS. just for your info , Google Authenticatior does not support very long keys as well.