WordPress Spam – ZERO Tolerance with #Hashcash!

WordPress spam – WordPress bloggers’ nightmare is far from becoming history but Hashcash almost promises zero tolerance.

Hashcash.io is introducing a method that forces the user’s browser to solve math. This method is said to secure sites against brute force attacks. It leverages open technology including Asm.js, HTML5 and Web Workers to force your login and comment forms disabled until your browsers has solved the required math. I think this is a new way to keep bot and spammers panting off your blog.

CAPTCHAs are becoming more and more unpopular. It becomes often very annoying to be stopped or slowed down by some illegible mixture of numbers and characters.

I often find myself turned off some pages because of several failed attempts at trying to figure out the correct representation on some twisted image.

NB: Here is a post I wrote on how to secure a new WordPress Blog. Please check it out here!

GASP has made things a bit milder by coming up with a check box. However, both checkbox and CAPTCHAs are still known for some unacceptable tolerance rate.

Today it is possible to buy access to API which solves any kind of CAPTCHA for just $0.70 per 1000 CAPTCHA images solved by a real human being. That makes CAPTCHAs almost ridiculous.

The new “browser math” solution, Hashcash WordPress spam Plugin integrates Hashcash.IO service with login, registration, and comment forms.

WordPress spam zero with Hashcash!

For a better understanding, let’s see how this plugin works.

First, the submit button is disabled until the user clicks the lock icon to unlock it. Here is what it looks like;

wordpress spam hashcash

Once you click that unlock button,  a progress bar fills up while the browser is solving the math to unlock the submit button. This updates both visually and via WAI-ARIA to inform blind users via screen reader about the progress.

wordpress spam progress bar

The click on the Locked icon is the key action that tells the form you are not a bot. You are human to submit the form.


hashcash wordpress spam plugin

Once the browser is through with the math, the button gets unlocked and the green unlocked indicator is shown.

NB: This also applies to comment and registration forms.

wordpress spam comment forms


Installing and activating Hashcash WordPress Antispam.

First, you download and install this wordpress spam plugin from your WordPress dashboard.

Go to Hashcash.io and create an account (by invitation only). Grab your public and private keys. These will be required to activate the plugin on the settings page within your blog admin.

hashwash wordpress anti spam

You can adjust how much work browser need to do to unlock widget with complexity. The larger the value, the longer it takes to finish work. Good starting point is 0.01, which is the default value.

Hashcash WordPress Spam Plugin supported browsers!

  • Google Chrome 7+
  • Mozilla Firefox 4+
  • Internet Explorer 10+
  • Opera 11.6+
  • Safari 5.1+
  • Android Browser 4.4+
  • iOS Safari 5+
  • Blackberry Browser 10+

Make money with Hashcash!

The Hashcash team has promised users will be able to make money with their plugin in the future. Though I have written them to find out more (not sure for a response though), I still don’t have a clue how they will go about it. However, it will be quite interesting to add another money making channel to my blog.

Let’s talk …

How are you fighting spam and hackers on your blog? Are you using commentluv Premium with GASP enabled? Are you using any CAPTCHAs? Are they effective?

Share your views with us in the comment bow below. If you like this post, kindly share it on social media. The buttons are just above the post 😉

23 thoughts on “WordPress Spam – ZERO Tolerance with #Hashcash!”

  1. Hi Enstien!

    I must say that you have done perfect effort and homework to bring this awesome and useful wordpress anti spam plugin for us and for your readers.

    Thanks for your valuable efforts, Keep On Doing With It!

  2. Interesting and useful post,This is a good plugin, that offers a new way to prevent spam. it was great!, thanks.

  3. Hello Sir!

    I really find the article very useful. Even I am feel frustrated with CAPTCHA. They are ridiculous while solving them. Further, the plugin you are talking is secure and very helpful for me. Even I will download and start working on it.

    Though the plugin is used to secure your login from bots but are you sure that there is no solution to it like we have for CAPTCHA solving solutions which you talked about.

    Thank you for your valuable information.

  4. Hi Enstine, this one of the best plugin to safe your wordpress blogs, I am getting too many spam comments, even though I use GASP plugin but still I get many spam comments. Thanks for informing about this awesome plugin.

  5. Hi Enstine,

    Nice review!
    Indeed, spam is an enemy of every blogger. In the past, I too overwhelmed to deal with it. But now, I use GASP, although there is still a bit of spam that passes, at least not as much as before. 🙂

    I think, CAPTCHAs are not very effective anymore. It was hopeless I guess. 😀

    This is a good plugin. Plugin that offers a new way to prevent spam. it was great!
    Thanks for this post Enstine! 🙂


    • Hey Nanda,
      Who doesn’t hate spam? I think even spammers hate themselves 😉
      This plugin will be a kick in their butte

      Thanks for visiting today and do have a wonderful weekend

  6. That’s certainly a great alternative to frustrating captcha, and also ensure better security than captcha as there are number of tools which helps spammers to automatically fill up captcha.

  7. Interesting and useful post, I’m gonna be trying the hashcash plugin right after I finished commenting here.

    I guess security comes first for every blog 🙂

  8. Hi Muki,
    I am again here to seek help from you. Right after reading your article I installed hashcash plugin but can’t active. I was to sign up but it required an invitation code. It said to active generate button but unfortunately I didn’t see any generate button. Can you plz help me to active this plug in. I really need it.

  9. Muki I was searching such a awesome plug in for several days. Al last I got it from you in my inbox. I am totally fed up with spam comment in my blog. It’s totally disgusting to remove lots of spam comments daily. Thanks a lot Muki for always providing helpful information.

  10. Hi Enstine,

    Nice post..

    I appreciate the way you always come out with interesting topic for your blogs. This is one of the best way to keep your subscribers connected with you.
    Love reading your Blogs..Keep sharing such interesting and useful information.

  11. Hey enstine, Thanks for the share pal. I have been getting tons of spams and I hate it.

    I am going to try this out because it seems like it will help to fight spam on my blog.

    Thanks again bro!

  12. This is called valuable updates,

    I very happy to know this new information that Hashcash.io is introducing a method that forces the user’s browser to solve math. All WP bloggers are going to love this awesome updates.

    Thank you so much for informing about this useful solution. Keep updating 🙂

  13. This indeed seems a very good plugin Enstine. I am surely gonna try it if I get invite. These days I am seeing increase in login attacks on my blogs.

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