Considered the security of Web servers and typical errors committed
Web developers when writing scripts in the languages of PHP, ASP and Perl. The
measures to hack into real Web sites that have vulnerabilities, including popular ones. In the Theo-
In practice, common hacker attacks are considered: DoS, Include, SQL-
injections, crossite scripting, bypass authentication, etc. The main techniques are described
protection against attacks and recommendations for writing secure code. In the second
The publication adds new examples of real errors, as well as a description of Captcha
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