Analysis of illegal content detection methods for Baidu cloud offline downloads

Recently, the country began a round of net operations to clear obscene online information. Major Internet manufacturers have begun to take actions. For example, Baidu cloud's offline download, which was very useful in the past, was once closed. Later, this classic word appeared, and cannot be downloaded because the illegal content is blocked.

In fact, not all blocked videos are unhealthy videos. Some of them are simply because the file name contains some words. For example, almost all the gun versions in the United States cannot be downloaded and tested offline by Baidu cloud. It is said that this method is still detected in thunder and other places. Therefore, let's analyze how the detection is implemented.

First, I uploaded a BT file. The content in the BT file is a movie in the tiangtiangu, but I changed the file name to a file name containing sensitive words, and the image will not be uploaded, baidu cloud prompt me decisively that illegal content will not be downloaded. However, my seed is clearly the secret of heaven, and Sun Wukong is also sensitive? Haha, speechless. Next, we will change the seed file name back to the tiangtiangu city. After the upload is complete, it will be decisive and smooth.

Can we tell from this that Baidu cloud's detection is a simple file name-based detection? The answer is no. Baidu is so awesome Internet companies, how can they simply use the method of pediatrics to block it, so it is not possible to change the file name to easily refer to the past? Let's do a test. I found an unhealthy seed and tested it. The file name was broken down into a mixture of numbers and letters. I found that Baidu cloud repeatedly prompted me that it contained illegal content. It can be proved that Baidu cloud will carefully read the files in the seeds and query the file names one by one.

If you want to bypass this, someone on the Internet seems to have said that you can use bencode editor to edit the seed file. However, after testing, the success rate is not high. Moreover, this software is a high-tech software that can be used well, completely ungrounded. However, modifying the Seed Internal Parameters seems to have a high technical content, in a blog saw a website http://www.bteditor.com, very perfect to achieve the modification of the BT file internal information. After several tests, it is completely blocked.

However, it seems that some seed files cannot be offline even if they are blocked, and the hash code of the seed changes after cleaning, as a result, the original resource information cannot be found when the cloud disk performs file hash authentication, and some seeds still cannot be downloaded. Some tracker servers also seem to have crashed, which may lead to resource unavailability and seem complicated.

In the next article, we are going to study the magnetic link acquisition, which is a lot better than the pure seeds in bt2.0.

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