CAPCTHA which stands for Completely Automated Public Turing Tests to Tell Computers and Humans Apart seems irritating to almost all web users. Be it a bio form, or commend box, or some sign up page, you need to go through CAPTCHA before completing an action. Bur for the people who are aware of network security issues, CAPTCHA is a blessing. This tool helps them prevent spammers and robots.
Initialized for e-commerce websites, CAPTCHA has now become part and parcel of each activity that you perform online. This is due to the fact that there are spammers and hackers all around the internet world, and it has become necessary to preserve important information.
As a web designer, you need to be very careful and creative while adding the CAPTCHA tool over a website. Here are a few good tips that can help you make interesting and effective CAPTCHA.
Use Multi-colored Text Letters
Stuffing a text recognition CAPTCHA with the letters of same colors and font makes the test quite rough and boring, and it erodes the entire interest of a user who is already sick of filling up a long form. So always use different colors and fonts while making this sort of CAPTCHA. This will grab the not only grab the attention of users but also motivate them enter the letters passionately.
Use Securimage CAPTCHA
This is a PHP supported CAPTCHA that easily complies with all browsers. The script for this CAPTCHA is available free of cost. What you need is to copy the code and paste on the pages where you want. This is an easy and effective tool at the same time. Most of the professional designers use this.
Use WebSpamProtect CAPTCHA:
This CAPTCHA is really effective for the pages that are made in PHP, Perl, ASP or ASP.NET. This is also easy to use. You only have to put a small code of this tool within the code of your pages. This tool generates a verification code automatically when a new user comes. This is somewhat effective tool which involves less effort and more benefits.
Use CryptograPHP CAPTCHA
This is also a PHP Script which can easily be embedded in your web code. When a new user hits the webpage, this tool randomly generates letters and numbers together or one at a time. This is effective enough to keep the spammers out all the time.
This is an image verification CAPTCHA. This does not require a user to type text in a given box, rather asks him/her to identify one of various objects. This sort of CAPTCHA is interesting to a great extent and it does not bore users much. Vidoop is the choice of a large number of web designers.
Once you integrate the Ironclad CAPTCHA code with the code of your web pages where you want to apply this tool, this CAPTCHA will generate random 3D images which are quite easy to identify for human beings, but really tricky to bypass for robots. This CAPTCHA is mostly used for stopping spam comments. You can use this in PHP and ASP.NET applications.
This is a funny CAPTCHA image I found over the internet.
Simpler is always better. If your website is of average category, you can go for this CAPTCHA. Text Disguise will automatically generate an image based text. But this text will consist of simple and straight letters embedded in an object. The problem with this tool is that it can be hit by robots with not much difficulty.
After from the fact that Bootdetect is an award winning tool, this CAPTCHA is considered to be highly secure and reliable for large-scale websites. It generates text letters of different sizes and shapes that are hard to be bypassed by robots, but human beings can read them easily.
Use Logic Questions
Using questions of logic and math is an effective way to generate good and secure CAPTCHA. In this sort of CAPTCHA, you have to give a statement along with three to four different answer options. By selecting the correct one, users can go through it. This best thing about this is that it sharpens the IQ levels of users as well.
The Honeypot Technique
The Honeypot technique is basically a trap to catch robots. What you have to do is to create a hidden field in your form that will only be visible to robots. When this field will be filled, the Honeypot will quickly reject the form submission by terming it as spam. However, this tool is not highly reliable and effective for big projects.
The Checkbox Technique
You may also use Checkbox technique to catch and filter out robots. By using this, you will create a checkbox at the end of a form with the text “I am not a robot”. By checking this in, a user can submit the form. Again, this is what you cannot trust all the time as some bots may also have capacity to check it in.
The Puzzle Image Technique
This is also a sort of IQ based CAPTCHA. Designers use a puzzle image at the end of a form and ask users to solve the puzzle for successful submission. This is an interesting technique and bots cannot be able to go through it easily. While using this technique, make sure that you use only easy and light image. If you use very difficult ones, users will get bored
With a mammoth rise in cyber crimes during the last decade of this century, the significant for CAPTCHA has increased manifold. Without this, you cannot be able to protect your website and its important data from spammers and robots. If you are a client, always ask your designer to use high quality CAPTCHA in the script of your web pages. If you are a designer, you must be aware of the latest tool and techniques of generating good CAPTCHA so that you can satisfy your client easily.