Adds Subresource Integrity (SRI) attributes to your page's elements for better protection against JavaScript DDoS attacks.

maymay

A WordPress plugin for easily adding a <a href="//www.w3.org/TR/SRI/" rel="nofollow ugc">Subresource Integrity (SRI)</a> declaration to any third-party content your pages load. The standards-based <code>integrity</code> attribute is a defense-in-depth best practice currently making its way into browsers. This plugin closely tracks the W3C draft.
Currently, the plugin automatically detects any third-party resources (like JavaScript libraries) and will make a SHA-256 hash of the content. It remembers this hash (until you uninstall the plugin or delete the hash from the admin interface), and modifies your page’s <code><script></code> and <code><link></code> elements on-the-fly. This way, your visitor’s Web browsers can automatically ensure that the specific library you’re using is the one they’re loading.
Using this plugin can dramatically reduce the liklihood that visitors to your site will be strong-armed into participating in an HTTP DDoS attack. For more information, see “<a href="https://blog.cloudflare.com/an-introduction-to-javascript-based-ddos/" rel="nofollow ugc">An introduction to JavaScript-based DDoS</a>” by Nick Sullivan.
Future versions of this plugin will also provide an easy-to-use interface for site administrators to maintain a customized list of resource hashes, and to trigger on-demand integrity checks of these resources.
This plugin is still somewhat skeletal. Feature requests and patches are welcome! Please provide a test case with your patch. See the <code>tests</code> subdirectory for unit tests. 
If you like this plugin, please consider <a href="https://www.paypal.com/cgi-bin/webscr?cmd=_donations&business=TJLPJYXHSRBEE&lc=US&item_name=WordPress%20Subresource%20Integrity%20Plugin&item_number=wp-sri&currency_code=USD&bn=PP%2dDonationsBF%3abtn_donate_SM%2egif%3aNonHosted" rel="nofollow ugc">making a donation</a> for your use of the plugin, or better yet, contributing directly to <a href="http://Cyberbusking.org/" rel="nofollow ugc">my’s Cyberbusking fund</a>. Your support is appreciated!

Subresource Integrity (SRI) Manager

I am confident your advice ...
Ensure your assets (scripts, stylesheets) were added using the WordPress API hooks, such as wp_enqueue_script(), and so on.
... is sound. It is just a bit beyond my skill set/comfort level. This reflects my limitations, not the plugin. The SRI thing badly needs a solution that dunderhead WP users like myself can implement, and you seem to be the only one trying to address it. So, good for you. Much appreciated. I'll do some learning and muster my courage and perhaps try again. 

Giving an 'A' for effort

I appreciate your effort for making this plugin, really helpful. But not working for all external scripts.Still you're my hero.

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