\documentclass{article}
\usepackage{amstext}
\usepackage[designi]{web}
\usepackage{exerquiz}[2021/06/24]
\usepackage[!showscore]{eq-pin2corr}[2021/06/24]

%\previewOn\pmpvOn

\usepackage[ordinary]{thorshammer}

\thQzHeaderL{Secured Quiz}
\thQzHeaderCQ{Quiz 1}

% Thor's hammer modifies this definition, we restore it to its
% 'ordinary' definition.
\renewcommand\eqQuizPointsMsg{%
"\eqptScore\space"+ptScore+" \eqOutOf\space"+nPointTotal}

\let\app\textsf
\let\pkg\textsf
\let\uif\textsf
\let\env\texttt
\let\opt\texttt
\def\cs#1{\texttt{\char`\\#1}}


\execJSOn
\useBeginQuizButton[\CA{Begin}]
\useEndQuizButton[\CA{End}]

% the default PIN number for eq-pin2corr is 5243
%
% When building your own quiz document, decide on a PIN number
% then use the utility document get-hash-string.pdf to acquire
% the corresponding hash string. Place your own PIN and hash string
% in the two arguments of \declPINId.
\declPINId{5243}{02JRVZdRgYgCA-Rtje8VkD} % PIN number, hash string
% So instructor can bypass entering the PIN.
\classPINVar{_PinCode1}

\DeclareQuiz{qz1}

\begin{document}

\section{Introduction}

\noindent\textbf{Goal:} Make the \uif{Correct} button password protected.
This revised file now uses the
\pkg{\href{https://ctan.org/pkg/eq-pin2corr}{eq-pin2corr}} package to make
things simpler. Additional commands are introduced here to manage the smooth
transition from password PIN protection, to an ordinary quiz, and back to a
PIN protected quiz.\medskip

\noindent\textbf{Discussion:} This file illustrates the methods for
protecting the \uif{Correct} button with a password. To create a PIN
protected \uif{Correct} button, expand \cs{usePINCorrBtn} (\pkg{eq-pin2corr})
prior to the quiz. Following the quiz, use the commands \cs{restoreNormalEndQuiz}
(\pkg{exerquiz}) and \cs{restoreCorrBtn} (\pkg{eq-pin2corr}). The latter
restores the default action of the \uif{End Quiz} control, this is needed
because \pkg{thorshammer} changes this action to a custom action;
\cs{restoreCorrBtn} removes the PIN security of the \uif{Correct} control.

There is another command \cs{useEndQuizThor} (\pkg{thorshammer}) is used to
modify the \uif{End Quiz} control to the action as defined by the
\pkg{thorshammer} package. Read additional comments found in the body and
source of this file.


\newpage

\section{Quiz with PIN to correct}

% require students to answer all questions
\renewcommand\minQuizResp{highThreshold} % 1

For the quiz below, the \uif{Correct} button has an encrypted
password. The password appears in parentheses for the convenience of the casual reader.

% use password version of \CorrButton action
\usePINCorrBtn

\begin{quiz*}{\currQuiz}
Solve each
\begin{questions}
    \item The sum of 1 and 1 is\dots
\begin{answers}{5}
\bChoices
  \Ans0 0\eAns
  \Ans0 1\eAns
  \Ans1 2\eAns
  \Ans0 3\eAns
  \Ans0 4\eAns
\eChoices
\end{answers}
\item $9+8=\RespBoxMath{17}{1}{.0001}{[0,1]}\cgBdry\CorrAnsButton{17}$
\end{questions}
\end{quiz*}\quad\PointsField{\currQuiz}\olBdry\CorrButton{\currQuiz} (PIN: \numPINId)\vcgBdry

\AnswerField{\currQuiz}

\newpage

\thQzHeaderL{Ordinary Quiz}
\thQzHeaderCQ{Quiz 2}


\section{Quiz without PIN to correct}

Now we try to create an ordinary \pkg{exerquiz} quiz without password protection.


% Now do an ordinary quiz
\restoreNormalEndQuiz
\restoreCorrBtn

\renewcommand\minQuizResp{lowThreshold}

\begin{quiz*}{qz2}
Solve each
\begin{questions}
    \item The sum of 1 and 1 is\dots
\begin{answers}{5}
\bChoices
  \Ans0 0\eAns
  \Ans0 1\eAns
  \Ans1 2\eAns
  \Ans0 3\eAns
  \Ans0 4\eAns
\eChoices
\end{answers}
\item $9+8=\RespBoxMath{17}{1}{.0001}{[0,1]}\cgBdry\CorrAnsButton{17}$
\end{questions}
\end{quiz*}\quad\PointsField{\currQuiz}\olBdry\CorrButton{\currQuiz}\vcgBdry

\AnswerField{\currQuiz}


\newpage

\thQzHeaderL{Secured Quiz}
\thQzHeaderCQ{Quiz 3}


\section{Another quiz with PIN to correct}

It is possible to have a different PIN number for this quiz (multiple PINs in one document), but
I see no need for this.

The previous quiz was a normal \pkg{exerquiz} quiz. We now want another PIN protected quiz, so
prior to this next quiz we expand \cs{usePINBtn} and \cs{useEndQuizThor}. The latter is a new
command that restores the default action of the \pkg{thorshammer} package to the \uif{End Quiz} event.

\DeclareQuiz{qz3}

\usePINCorrBtn
\useEndQuizThor

% require students to answer all questions
\renewcommand\minQuizResp{highThreshold}

\begin{quiz*}{qz3}
Solve each
\begin{questions}
    \item The sum of 1 and 1 is\dots
\begin{answers}{5}
\bChoices
  \Ans0 0\eAns
  \Ans0 1\eAns
  \Ans1 2\eAns
  \Ans0 3\eAns
  \Ans0 4\eAns
\eChoices
\end{answers}
\item $9+8=\RespBoxMath{17}{1}{.0001}{[0,1]}\cgBdry\CorrAnsButton{17}$
\end{questions}
\end{quiz*}\quad\PointsField{\currQuiz}\olBdry\CorrButton{\currQuiz} (PIN: \numPINId)\vcgBdry

\AnswerField{\currQuiz}


\end{document}