{"id":33343,"date":"2019-10-31T21:52:06","date_gmt":"2019-10-31T18:52:06","guid":{"rendered":"https:\/\/prohoster.info\/blog\/v-chrome-poyavitsya-zashhita-ot-peredachi-storonnih-cookie-i-skrytoj-identifikatsii\/"},"modified":"2019-10-31T21:52:06","modified_gmt":"2019-10-31T18:52:06","slug":"v-chrome-poyavitsya-zashhita-ot-peredachi-storonnih-cookie-i-skrytoj-identifikatsii","status":"publish","type":"post","link":"https:\/\/prohoster.info\/pt\/blog\/news\/v-chrome-poyavitsya-zashhita-ot-peredachi-storonnih-cookie-i-skrytoj-identifikatsii","title":{"rendered":"O Chrome ter\u00e1 prote\u00e7\u00e3o contra o envio de Cookies de terceiros e identifica\u00e7\u00e3o oculta","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"

A empresa Google apresentou<\/a><\/noindex> mudan\u00e7as futuras no Chrome visando aumentar a privacidade. A primeira parte das mudan\u00e7as aborda o gerenciamento de Cookies e o suporte ao atributo SameSite. A partir do lan\u00e7amento do Chrome 76, esperado para julho, haver\u00e1 ativado<\/a><\/noindex> A bandeira «same-site-by-default-cookies», que na aus\u00eancia do atributo SameSite no cabe\u00e7alho Set-Cookie, por padr\u00e3o, ir\u00e1 definir o valor «SameSite=Lax», restringindo o envio de Cookies para inser\u00e7\u00f5es de sites de terceiros (mas os sites ainda poder\u00e3o remover a restri\u00e7\u00e3o, definindo explicitamente o valor SameSite=None ao definir o Cookie).<\/p>\n

Atributo SameSite<\/a><\/noindex> permite definir as situa\u00e7\u00f5es em que a transfer\u00eancia de Cookies \u00e9 permitida ao receber uma solicita\u00e7\u00e3o de um site de terceiros. Atualmente, o navegador envia Cookies para qualquer solicita\u00e7\u00e3o ao site para o qual os Cookies foram definidos, mesmo que inicialmente outro site tenha sido aberto, e a solicita\u00e7\u00e3o seja feita indiretamente por meio do carregamento de uma imagem ou atrav\u00e9s de um iframe. Redes de an\u00fancios utilizam essa caracter\u00edstica para rastrear os movimentos do usu\u00e1rio entre sites, e
\ncriminosos para organizar ataques CSRF<\/a><\/noindex> (ao abrir um recurso controlado pelos atacantes, uma solicita\u00e7\u00e3o \u00e9 enviada silenciosamente a outro site, onde o usu\u00e1rio atual est\u00e1 autenticado, e o navegador do usu\u00e1rio envia Cookies de sess\u00e3o para essa solicita\u00e7\u00e3o). Por outro lado, a capacidade de enviar Cookies para sites de terceiros \u00e9 usada para a inser\u00e7\u00e3o de widgets em p\u00e1ginas, por exemplo, para integra\u00e7\u00f5es com YouTube ou Facebook.<\/p>\n

Com o atributo SameSite, \u00e9 poss\u00edvel controlar o comportamento ao definir Cookies e permitir o envio de Cookies apenas em resposta a solicita\u00e7\u00f5es originadas do site de onde esses Cookies foram inicialmente obtidos. SameSite pode assumir tr\u00eas valores: «Strict», «Lax» e «None». No modo ‘Strict’, Cookies n\u00e3o s\u00e3o enviados para qualquer tipo de solicita\u00e7\u00e3o intersite, incluindo todos os links de entrada de sites externos. No modo ‘Lax’, s\u00e3o aplicadas restri\u00e7\u00f5es mais suaves e a transfer\u00eancia de Cookies \u00e9 bloqueada apenas para subsolicita\u00e7\u00f5es intersite, como solicita\u00e7\u00f5es de imagem ou carregamento de conte\u00fado via iframe. A diferen\u00e7a entre «Strict» e «Lax» se resume ao bloqueio de Cookies ao clicar em links.<\/p>\n

Entre outras mudan\u00e7as iminentes, tamb\u00e9m est\u00e1 previsto a implementa\u00e7\u00e3o de uma restri\u00e7\u00e3o rigorosa, proibindo o processamento de Cookies de terceiros para solicita\u00e7\u00f5es sem HTTPS (com o atributo SameSite=None, os Cookies poder\u00e3o ser definidos apenas no modo Secure). Al\u00e9m disso, est\u00e1 sendo planejado um trabalho para prote\u00e7\u00e3o contra o uso de identifica\u00e7\u00e3o oculta («browser fingerprinting»), incluindo m\u00e9todos de gera\u00e7\u00e3o de identificadores com base em dados indiretos, como resolu\u00e7\u00e3o da tela<\/a><\/noindex>, lista de tipos MIME suportados, par\u00e2metros espec\u00edficos nos cabe\u00e7alhos (HTTP\/2<\/a><\/noindex> e HTTPS<\/a><\/noindex>), an\u00e1lise de plugins e fontes instalados , disponibilidade de determinadas APIs da web, espec\u00edficas para placas de v\u00eddeo<\/a><\/noindex>renderiza\u00e7\u00f5es usando WebGL e Caracter\u00edsticas<\/a><\/noindex> rendoriza\u00e7\u00f5es usando WebGL e Canvas, manipula\u00e7\u00f5es<\/a><\/noindex> com CSS, an\u00e1lise das caracter\u00edsticas de uso com teclado<\/a><\/noindex> e O estudo de 100 mil sites mais populares de acordo com o ranking Alexa mostrou que em 9040 deles (10,18%) \u00e9 aplicado c\u00f3digo para identifica\u00e7\u00e3o oculta de visitantes. Considerando os mil sites mais populares, esse tipo de c\u00f3digo foi identificado em 30,60% dos casos (266 sites), enquanto entre os sites classificados entre mil e dez mil, foi encontrado em 24,45% dos casos (2010 sites). A identifica\u00e7\u00e3o oculta \u00e9 geralmente aplicada em scripts fornecidos por servi\u00e7os externos para<\/a><\/noindex>.<\/p>\n

Al\u00e9m disso, no Chrome ser\u00e1 adicionada<\/a><\/noindex> prote\u00e7\u00e3o contra abusos relacionados \u00e0 dificuldade de retorno \u00e0 p\u00e1gina inicial ap\u00f3s navegar para outro site. Refere-se \u00e0 pr\u00e1tica de congestionamento do hist\u00f3rico de navega\u00e7\u00e3o com uma s\u00e9rie de redirecionamentos autom\u00e1ticos ou \u00e0 adi\u00e7\u00e3o artificial de entradas falsas no hist\u00f3rico de visualiza\u00e7\u00f5es (via pushState), fazendo com que o usu\u00e1rio n\u00e3o consiga utilizar o bot\u00e3o «Back» para retornar \u00e0 p\u00e1gina inicial ap\u00f3s uma navega\u00e7\u00e3o acidental ou redirecionamento for\u00e7ado para um site fraudulento ou malicioso. Para proteger contra tais manipula\u00e7\u00f5es, o Chrome, no manipulador do bot\u00e3o Back, ir\u00e1 ignorar entradas relacionadas a redirecionamentos autom\u00e1ticos e manipula\u00e7\u00f5es do hist\u00f3rico de visitas, mantendo apenas p\u00e1ginas abertas por a\u00e7\u00f5es expl\u00edcitas do usu\u00e1rio.<\/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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[…]<\/p>\n","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[702],"tags":[],"class_list":["post-33343","post","type-post","status-publish","format-standard","hentry","category-news"],"aioseo_notices":[],"aioseo_head":"\n\t\t\n\t\n\t\n\t\n\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\n","aioseo_head_json":{"title":"\ud83e\udd47O Chrome ter\u00e1 prote\u00e7\u00e3o contra o envio de cookies de terceiros e identifica\u00e7\u00e3o oculta | ProHoster","description":"A Google apresentou as mudan\u00e7as futuras no Chrome, visando 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