What Is Captcha? Understanding Usage and Necessity

what is captcha

What Is Captcha- All That You Must Know About the Term

Do you notice that a website asks you to enter a series of numbers, sums, or words before finalizing credentials? It is captcha, most of the time shown in zigzag and jumbled patterns to confuse the user. While it is a widespread activity that every user has almost every day, it is essential to understand what is captcha in detail.

What is captcha code or a semaphore?

The first thing that you must know is that captcha stands for Completely Automated Public Turing process. The primary purpose of this cryptography is to differentiate between humans and computers. Defining it differently, a captcha or semaphore identifies whether the user is a spam robot instead of a real human. As you already know, it is called a cryptic challenge because the computer stretches and twists the characters. Therefore, it is a challenge for the user to crack the same and enter it to proceed further.

How does a semaphore or captcha work?

Semaphores came into being to restrict spammy software that tries to post comments or make excess purchases. Moreover, a distorted pattern or series of letters is the most common type of semaphore or captcha. Another prevalent way of proceeding further, in this case, is by selecting images from a set that has the same theme. The computers and the internet are combinations of various coding languages that are unique. Besides, it is difficult for computers to understand everyday human speech, especially the slangs. Therefore, solving a captcha is entirely different. Plus, it is done in a way that the computer understands the input correctly.

Who uses semaphores or captcha?

As you already know, almost all websites that want to identify whether a user is a spammy robot will ask for a cryptic answer. Primarily, semaphores help in the verification of internet polls. In 1999, Slashdot’s poll was asking users to vote for the best graduate school for computer science students. So, students from MIT and Carnegie Mellon University chose the wrong way of winning the polls. Unfortunately, they created bots to ensure repeat votes for their respective institutions. Bots are automatic programs that can complete work as per instruction.

As a result of such technicalities, MIT and Carnegie Mellon was the recipient of a few thousand votes each. On the other hand, the rest of the institutions received merely a hundred votes each. Now, this is where semaphores come to use because the presence of these ensures no such wrongdoings. Such cryptography is ubiquitous also when users want to fill and submit forms online on Gmail or Yahoo! Where users can create free accounts. Therefore, a captcha or semaphore will ensure that no user can use bots to create multiple accounts.

Some more examples for your knowledge

Another captcha example is when you visit a ticket reservation website such as TicketMaster. Here you will find the usage of cryptography to ensure that no spammer can purchase bulk tickets leaving no option for others. As a result, legitimate customers will get a chance to buy tickets according to genuine requirements. Moreover, ticket scalpers will have zero chances of creating any nuisance using the website.

Last but not least, we must mention blogs or web pages containing contact forms or message boards. Such websites have to use semaphores or cryptography to ensure the restriction of spamming. It is because several users keep posting comments unnecessarily. Moreover, such spamming is nothing short of cyberbullying, and as a website owner, you must know that. Plus, the presence of semaphore means that bots cannot make an entry here. You can refer to a captcha using several other terms. For example, semaphore, decipher, cipher, cryptography, and encrypt are a few of our synonyms.

what is captcha

How to use deciphers to prevent scammers?

As you already know, deciphers or semaphores have several options to prevent scammers and ensure websites’ safety. Some of the most common ways are here in the list below.

  • Ensuring protection of email IDs
  • Protects against comment spamming on pages and blogs
  • Keeps away bots on registration websites
  • Prevention of dictionary attacks
  • Restricts the entry of bots in case of online polls
  • Keeps away junk mails and email worms


Benefits of using decipher

Check out the following points to understand why any website must use deciphers to ensure safety.

Restriction of spam messages and comments

Any illegal and crappy bots will surely try to spam your website pages by posting unnecessary advertisements and comments. As a result, there is a significant disturbance when genuine users want to communicate with you. Moreover, it is a significant cause that will frustrate your page visitors. Therefore, there are high chances that you may lose out on a considerable amount of traffic on the website. So, as a responsible website owner, you must understand that using deciphers is the best way to keep spamming at bay. Especially if there is a comment section on your website, then cryptography becomes mandatory. The only disadvantage here is that to restrict the entry of spammers. You have to make genuine users go through the trouble of solving such ciphers.

Preventing fake registrations

Businesses and organizations on the internet often use registration forms and signups for providing services to all their users. Now, bots’ primary target is such businesses and websites that they try to fill with all types of garbage data. Therefore, there is a deviation of the rate of acquisition metrics for the particular website. Ciphers and deciphers usually ensure the safety of the registration pages from such bot activities. However, you will be surprised to know that there are advanced bots that are uncontrollable. Therefore, they manage to spam the pages despite the implementation of deciphers.

On the other hand, many internet and computer experts believe that captcha is not useful enough every time. Moreover, they impart a poor user experience. Plus, they are undoubtedly not perfect solutions for the bot- restriction. Last but not least, it is a very inconvenient option for visually handicapped people.

Bypassing and auto solving a captcha using web browsers.

Some captchas or semaphores are quite challenging to solve, even for users who have excellent vision. On the other hand, some semaphores are time-consuming, and therefore irritating. An example of such an annoying semaphore is a reCAPTCHA from Google. Here, the worst part is that you cannot complete it by solving a single puzzle. Instead, Google wants you to keep entering answers at least 4-5 times. Besides, if you enter something incorrect even once, it means the process continues.

We have some useful suggestions for you to get rid of the frustration of being unable to solve complex semaphores. The best answer for how to solve captcha is to suggest using a browser extension. Moreover, such extensions will help you when you are finding it difficult to see the semaphore well. As a result, you end up clicking on an incorrect picture and therefore have to go on with it.

So, in the following section, you will find some of the best examples of browser extensions capable of solving such cryptography.


Not just is this extension trendy; experts always recommend it for a problem- solving. However, it gets a little confusing because the original service source and that of the browser extension are different. One is at the anti-captcha.com, while the other is at the antcpt.com, respectively. You will also find the extension in every browser that supports the same, mostly Firefox and Chrome. Moreover, this extension is a premium one. Therefore, you must recharge it to use it to solve a set of semaphores.

Despite being a premium hack, you don’t have to worry much because this is pretty affordable. Also, the recharge amount is flexible. Therefore, you can decide how much or how less money you want to spend. For example, you can recharge your account with $1 and use it to solve around 1,000 ciphers. However, you must be aware that the prices of solving per cipher may fluctuate. Therefore, sometimes during peak hours, per cipher cost will be extra. If you are a Chrome user, then you get a set of 15 solutions as a trial after you add the extension to your Google account.


There are quite a few reasons why Buster is a favorite in the semaphore-solving market. The most common reasons are that it is accessible to all, free, and therefore requires no subscription. Moreover, this tool uses voice or speech recognition to crack any voice challenge in a semaphore. However, there is one disadvantage to this extremely efficient extension. It is that Buster is only capable of solving a Google ReCAPTCHA. Despite this issue, users prefer it because Google is the most common cipher that people use worldwide. Moreover, Buster extension is available for Opera and Firefox as well.

After the installation is complete, Buster cipher Solver becomes extremely easy to use. Moreover, it just requires a few mouse snaps to begin unraveling a ReCAPTCHA. When you experience a ReCAPTCHA, click “I’m not a robot” to open the test window. A green and orange symbol shows up at the base, click on it, and the voice challenge window will open. Now Buster will start tackling the cipher. Hacking ciphers is pretty quick and is typically done in less than 30 seconds, a lot quicker than the paid extensions.

While it’s working, you will find a circular symbol in the window. In case Buster cracks the ciphers, it will effectively finish the ReCAPTCHA. However, press the extreme left option to get another test and attempt once more if there is any problem or error. We believe Buster is capable of solving any cipher once at least four out of five times. If, in case, it fails to hack the captcha in the initial attempt, Buster will surely solve it by the second time.


One of the oldest of its types, Rumola, has been there for quite some time now. Earlier, the Rumola extension was available for Chrome, Safari, and Firefox. However, it is unfortunate that you will not find the extension for Safari and Firefox presently. Moreover, there is a bookmarklet that works on Javascript for any device that has an internet connection. Although the service is very restricted in these cases, the process helps other browsers use Rumola that is unable to run Chrome extensions otherwise.

The Rumola extension works majorly for ciphers that include identifying and entering words, characters, or numbers. Moreover, it can also solve simple math puzzles. However, Rumola does not work in the case of Google ReCAPTCHA, where you have to identify or reorder images. There is a default function of the extension that it starts identifying ciphers on any website you visit. However, you can switch off this option from the Chrome toolbar menu.

When you install Rumola for the very first time, they will let you enjoy five trial credits. However, these trial credits are majorly unreliable. For example, you may end up exhausting them merely by visiting a website. It is because Rumola starts auto-identifying ciphers and using those credits. Later, you can subscribe for $1.95 that will serve you six months. Besides, you will get 150 credits under this package. Otherwise, you can subscribe for $0.99 that will serve you 12 months. Besides, you will get 50 credits.

ReCaptcha Solver

It is different from others in this case because ReCaptcha Solver is a third-party browser extension. Therefore, it has no connection with a cipher-solving company. Instead, a user can choose a different premium service where you may have a subscription. As the name suggests, just Google ReCAPTCHA v2 is accessible here. Therefore, this extension is very similar to Buster. Moreover, before using this solver extension, you must signup with DeathByCaptcha and purchase credits. You may otherwise register with 2captcha, EndCaptcha, ImageTyperz, BestCaptchaSolver, Anti-Captcha, and more.


Most of us were unaware of the concept of semaphores or ciphers till now. However, now that you know about it, there is no way that you will feel irritated by solving them!