{"id":92955,"date":"2020-09-01T19:42:04","date_gmt":"2020-09-01T17:42:04","guid":{"rendered":"https:\/\/prohoster.info\/blog\/novosti-interneta\/identifikacziya-polzovatelej-po-istorii-poseshhenij-v-brauzere"},"modified":"2020-09-01T19:42:04","modified_gmt":"2020-09-01T17:42:04","slug":"identifikacziya-polzovatelej-po-istorii-poseshhenij-v-brauzere","status":"publish","type":"post","link":"https:\/\/prohoster.info\/pt\/blog\/news\/identifikacziya-polzovatelej-po-istorii-poseshhenij-v-brauzere","title":{"rendered":"Identifica\u00e7\u00e3o de usu\u00e1rios pelo hist\u00f3rico de navega\u00e7\u00e3o","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"

Funcion\u00e1rios da empresa Mozilla publicaram<\/a><\/noindex> resultados de um estudo sobre a possibilidade de identifica\u00e7\u00e3o de usu\u00e1rios com base no perfil de visitas no navegador, que pode ser vis\u00edvel a terceiros e sites. A an\u00e1lise de 52 mil perfis de visitas fornecidos por usu\u00e1rios do Firefox que participaram do experimento mostrou que as prefer\u00eancias de visita a sites s\u00e3o caracter\u00edsticas para cada usu\u00e1rio e s\u00e3o constantes. A singularidade dos perfis de hist\u00f3rico de visitas obtidos foi de 99%. Al\u00e9m disso, o alto grau de singularidade dos perfis se mant\u00e9m mesmo quando a amostragem \u00e9 limitada a cem sites populares.<\/p>\n

\"Identifica\u00e7\u00e3o<\/a><\/noindex><\/center><\/p>\n

A verifica\u00e7\u00e3o da possibilidade de reidentifica\u00e7\u00e3o foi realizada durante um experimento de duas semanas \u2014 os dados de visitas na primeira semana foram tentados de serem comparados com os dados da segunda semana. Foi descoberto que era poss\u00edvel reidentificar 50% dos usu\u00e1rios que visitaram 50 ou mais dom\u00ednios diferentes. Ao visitar 150 ou mais dom\u00ednios diferentes, a taxa de reidentifica\u00e7\u00e3o aumentava para 80%. A verifica\u00e7\u00e3o foi realizada em uma amostra de 10 mil sites para simular dados que grandes provedores de conte\u00fado poderiam obter (por exemplo, o Google pode monitorar acessos a 9823 sites desses 10000, o Facebook a 7348, e a Verizon a 5500).<\/p>\n

Essa caracter\u00edstica permite que grandes propriet\u00e1rios de recursos populares identifiquem os usu\u00e1rios com uma alta probabilidade. Por exemplo, empresas como Google, Facebook e Twitter, cujos widgets s\u00e3o colocados em sites de terceiros, podem teoricamente reidentificar cerca de 80% dos usu\u00e1rios.<\/p>\n

\"Identifica\u00e7\u00e3o<\/a><\/noindex><\/center><\/p>\n

Identificar sites anteriormente abertos tamb\u00e9m \u00e9 poss\u00edvel atrav\u00e9s de m\u00e9todos indiretos, como a varredura no c\u00f3digo JavaScript de dom\u00ednios populares, avaliando as diferen\u00e7as de lat\u00eancia ao carregar recursos \u2014 se o site foi aberto recentemente pelo usu\u00e1rio, o recurso ser\u00e1 fornecido quase instantaneamente a partir do cache do navegador. Anteriormente, para determinar p\u00e1ginas abertas, poderiam ser aplicados avalia\u00e7\u00e3o<\/a><\/noindex> configura\u00e7\u00f5es de cache HSTS (quando um site com HSTS \u00e9 aberto, a requisi\u00e7\u00e3o HTTP \u00e9 imediatamente redirecionada para HTTPS sem tentar acessar por HTTP) e an\u00e1lise<\/a><\/noindex> os estados da propriedade CSS 'visited'. <\/p>\n

M\u00e9todos semelhantes de determina\u00e7\u00e3o do hist\u00f3rico de visitas com base em CSS foram utilizados em uma pesquisa similar, realizada<\/a><\/noindex> De 2009 a 2011. Este estudo mostrou a possibilidade de identificar 42% dos usu\u00e1rios ao verificar 50 p\u00e1ginas e 70% ao verificar 500 p\u00e1ginas. Estudo da Mozilla confirmou<\/a><\/noindex> e esclareceu as conclus\u00f5es da publica\u00e7\u00e3o anterior, ao mesmo tempo em que se aumentou significativamente a precis\u00e3o na determina\u00e7\u00e3o do hist\u00f3rico de navega\u00e7\u00e3o, e a cobertura dos dom\u00ednios verificados foi ampliada de 6000 para 10000 (no total, foram obtidos dados sobre 660000 dom\u00ednios, mas na avalia\u00e7\u00e3o da identifica\u00e7\u00e3o foi utilizada uma amostra de 10 mil dom\u00ednios mais populares). <\/p>\n

<\/a><\/noindex><\/p>\n

Fonte: opennet.ru<\/a><\/p>","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"excerpt":{"rendered":"

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