<p><small>Posted October 19, 2023 by <aclass="stretched-link position-relative"href="/contributors/aravinth-manivannan/">Aravinth Manivannan</a> ‐ <strong>2 min read</strong></small><p>
<p><small>Last Edited October 21, 2023</small><p>
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<pclass="lead"></p>
<p>mCaptcha uses a Proof-of-Work (PoW) based algorithm to offer
Denial-of-Service protection, because of <ahref="https://www.w3.org/TR/turingtest/#proof-of-work">its excellent accessibility
<p>We also offer opt-in controls at installation level:</p>
<figure>
<imgclass="img-fluid lazyload blur-up"data-sizes="auto"src="/blog/introducing-mcaptcha-net/installation-level-opt-in_huf73c7a9ce7ec84ce553fffad281cd7ba_53366_20x0_resize_box_3.png"data-srcset="/blog/introducing-mcaptcha-net/installation-level-opt-in_huf73c7a9ce7ec84ce553fffad281cd7ba_53366_900x0_resize_box_3.png 900w,/blog/introducing-mcaptcha-net/installation-level-opt-in_huf73c7a9ce7ec84ce553fffad281cd7ba_53366_800x0_resize_box_3.png 800w,/blog/introducing-mcaptcha-net/installation-level-opt-in_huf73c7a9ce7ec84ce553fffad281cd7ba_53366_700x0_resize_box_3.png 700w,/blog/introducing-mcaptcha-net/installation-level-opt-in_huf73c7a9ce7ec84ce553fffad281cd7ba_53366_600x0_resize_box_3.png 600w,/blog/introducing-mcaptcha-net/installation-level-opt-in_huf73c7a9ce7ec84ce553fffad281cd7ba_53366_500x0_resize_box_3.png 500w"width="759"height="745"alt="A screenshot of the 'add sitekey' form on the mCaptcha dashboard with a checkbox for anonymously publishing performance statistics. It is not checked by default.">
<noscript><imgclass="img-fluid"sizes="100vw"srcset="/blog/introducing-mcaptcha-net/installation-level-opt-in_huf73c7a9ce7ec84ce553fffad281cd7ba_53366_900x0_resize_box_3.png 900w,/blog/introducing-mcaptcha-net/installation-level-opt-in_huf73c7a9ce7ec84ce553fffad281cd7ba_53366_800x0_resize_box_3.png 800w,/blog/introducing-mcaptcha-net/installation-level-opt-in_huf73c7a9ce7ec84ce553fffad281cd7ba_53366_700x0_resize_box_3.png 700w,/blog/introducing-mcaptcha-net/installation-level-opt-in_huf73c7a9ce7ec84ce553fffad281cd7ba_53366_600x0_resize_box_3.png 600w,/blog/introducing-mcaptcha-net/installation-level-opt-in_huf73c7a9ce7ec84ce553fffad281cd7ba_53366_500x0_resize_box_3.png 500w"src="/blog/introducing-mcaptcha-net/installation-level-opt-in.png"width="759"height="745"alt="A screenshot of the 'add sitekey' form on the mCaptcha dashboard with a checkbox for anonymously publishing performance statistics. It is not checked by default."></noscript>
<figcaptionclass="figure-caption">Add sitekey form on the mCaptcha dashboard with a checkbox for anonymously publishing performance statistics. It is not checked by default.</figcaption>
at both mCaptcha/mCaptcha and mCaptcha/survey to avoid exposing installations.</p>
<figure>
<imgclass="img-fluid lazyload blur-up"data-sizes="auto"src="/blog/introducing-mcaptcha-net/working-rpc_huca78e586ec60552618ec5b6b3f0d9a9a_322974_20x0_resize_box_3.png"data-srcset="/blog/introducing-mcaptcha-net/working-rpc_huca78e586ec60552618ec5b6b3f0d9a9a_322974_900x0_resize_box_3.png 900w,/blog/introducing-mcaptcha-net/working-rpc_huca78e586ec60552618ec5b6b3f0d9a9a_322974_800x0_resize_box_3.png 800w,/blog/introducing-mcaptcha-net/working-rpc_huca78e586ec60552618ec5b6b3f0d9a9a_322974_700x0_resize_box_3.png 700w,/blog/introducing-mcaptcha-net/working-rpc_huca78e586ec60552618ec5b6b3f0d9a9a_322974_600x0_resize_box_3.png 600w,/blog/introducing-mcaptcha-net/working-rpc_huca78e586ec60552618ec5b6b3f0d9a9a_322974_500x0_resize_box_3.png 500w"width="1842"height="1008"alt="A screenshot of a tmux window with logs of mCaptcha/mCaptcha and mCapctha/survey showing both of them talking to eachother">
<noscript><imgclass="img-fluid"sizes="100vw"srcset="/blog/introducing-mcaptcha-net/working-rpc_huca78e586ec60552618ec5b6b3f0d9a9a_322974_900x0_resize_box_3.png 900w,/blog/introducing-mcaptcha-net/working-rpc_huca78e586ec60552618ec5b6b3f0d9a9a_322974_800x0_resize_box_3.png 800w,/blog/introducing-mcaptcha-net/working-rpc_huca78e586ec60552618ec5b6b3f0d9a9a_322974_700x0_resize_box_3.png 700w,/blog/introducing-mcaptcha-net/working-rpc_huca78e586ec60552618ec5b6b3f0d9a9a_322974_600x0_resize_box_3.png 600w,/blog/introducing-mcaptcha-net/working-rpc_huca78e586ec60552618ec5b6b3f0d9a9a_322974_500x0_resize_box_3.png 500w"src="/blog/introducing-mcaptcha-net/working-rpc.png"width="1842"height="1008"alt="A screenshot of a tmux window with logs of mCaptcha/mCaptcha and mCapctha/survey showing both of them talking to eachother"></noscript>
<figcaptionclass="figure-caption">mCaptcha/mCaptcha uploading performance statistics to a mCaptcha/survey instance</figcaption>
</figure>
<h2id="status">Status</h2>
<p>We now have performance statistics uploads to mCaptcha/survey instances