Protection from bots, less tsifer and beeches
To read this article, enter the sequence of characters from the image.
Attention! Consider case and character language.
With the improvement of spam bots, defense mechanisms are also becoming more complex, but a phase has clearly been reached when many people cannot even make out pictures.
In particular, if these tests were done not quite adequate people.
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I personally met many test pictures in which both letters and numbers are present, separating some letters from some numbers is a more difficult task than deciphering the human genome.
Especially when authors use different “stylish” fonts.
Lower case Latin “l” is indistinguishable from one, and the letter “o” from zero. There may also be difficulties with the register, since complicating the work of bots, the letters are scaled, and, for example, the lowercase “w” from the uppercase “W” is indistinguishable when scaled.
Protection options with the use of mathematical operations are unsuitable - it is hardly harder to recognize the numbers on them than in ordinary pictures, and bots can add and multiply much better than most visitors.
I will not say that I am reinventing the two-wheeled pedal machine for driving on the ground, but here are a few alternative suggestions:
1. Use the knowledge of people of elementary truths, for example:
Nowadays, riddles are often used, but, apart from the fact that not every riddle a person knows (many of them are narrowly specific, and can only be known to the environment of the creator of the resource), almost all the resources I have met, questions are asked in plain text. If we combine the method of elementary truths and the “picture” method, protection will be noticeably more reliable.
2. The ability of people to separate some objects of reality from others, for example:
Specify the number of circles in the picture:
In this example, numbers are also added to finally knock down bots.
How many bitten apples do you see in the picture?
If the questions themselves also post pictures, the task of bots is complicated by an order of magnitude.
So you can come up with a lot of tests, much more understandable to man, and difficult for the bot, than the most popular now "digital-letter".
Attention! Consider case and character language.
With the improvement of spam bots, defense mechanisms are also becoming more complex, but a phase has clearly been reached when many people cannot even make out pictures.
In particular, if these tests were done not quite adequate people.
')
I personally met many test pictures in which both letters and numbers are present, separating some letters from some numbers is a more difficult task than deciphering the human genome.
Especially when authors use different “stylish” fonts.
Lower case Latin “l” is indistinguishable from one, and the letter “o” from zero. There may also be difficulties with the register, since complicating the work of bots, the letters are scaled, and, for example, the lowercase “w” from the uppercase “W” is indistinguishable when scaled.
Protection options with the use of mathematical operations are unsuitable - it is hardly harder to recognize the numbers on them than in ordinary pictures, and bots can add and multiply much better than most visitors.
I will not say that I am reinventing the two-wheeled pedal machine for driving on the ground, but here are a few alternative suggestions:
1. Use the knowledge of people of elementary truths, for example:
Nowadays, riddles are often used, but, apart from the fact that not every riddle a person knows (many of them are narrowly specific, and can only be known to the environment of the creator of the resource), almost all the resources I have met, questions are asked in plain text. If we combine the method of elementary truths and the “picture” method, protection will be noticeably more reliable.
2. The ability of people to separate some objects of reality from others, for example:
Specify the number of circles in the picture:
In this example, numbers are also added to finally knock down bots.
How many bitten apples do you see in the picture?
If the questions themselves also post pictures, the task of bots is complicated by an order of magnitude.
So you can come up with a lot of tests, much more understandable to man, and difficult for the bot, than the most popular now "digital-letter".
Source: https://habr.com/ru/post/10972/
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