Yandex has declined responsibility for a major leak of personal data of people claimed by Rush Agency expert Pavel Medvedev. Experts of the Russian railways, Sberbank, VTB, Moscow municipal services, and other online platforms are to blame for the loss of data, according to Yandex experts. booking tickets. The appearance of personal confidential data of people in the search results is explained by the \In particular, Yandex’s search algorithm indexes only those files that are not prohibited using a special robots.txt file. However, Boris Sobolev, a representative of ESET Russia’s product technical support department, believes that Yandex still has some fault in the leak. A closed indexing system does not allow site owners to realize how deeply penetration of a search engine when crawling occurs. Therefore, sites do not always restrict access to storage of personal information for search engines. According to Medvedev, who discovered the leak, SEO expert, VTB, Sberbank and the Unified Transport Portal of Moscow simply set up the security system incorrectly. One of the reasons Medvedev considers the lack of qualified specialists in these organizations. For their part, representatives of Sberbank and VTB are now checking and find out the reasons for the loss of their customers’ data. At the same time, the banks assured that the information that went to the Network would not be able to harm either the customers or the financial institution itself. Pavel Medvedev, in turn, does not recommend individuals to personally find out through the search engines whether his personal data leaked to the Network, because by entering In the search bar, a request with his personal information, the user himself becomes the reason for its distribution.