{"id":116317,"date":"2024-06-04T09:39:49","date_gmt":"2024-06-04T07:39:49","guid":{"rendered":"https:\/\/prohoster.info\/blog\/novosti-interneta\/v-android-platforme-grapheneos-poyavilas-vozmozhnost-sozdaniya-destruktivnogo-pin-koda"},"modified":"2026-02-15T22:08:22","modified_gmt":"2026-02-15T20:08:22","slug":"v-android-platforme-grapheneos-poyavilas-vozmozhnost-sozdaniya-destruktivnogo-pin-koda","status":"publish","type":"post","link":"https:\/\/prohoster.info\/pt\/blog\/news\/v-android-platforme-grapheneos-poyavilas-vozmozhnost-sozdaniya-destruktivnogo-pin-koda","title":{"rendered":"No Android, a plataforma GrapheneOS agora permite a cria\u00e7\u00e3o de um PIN destrutivo.","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"

Na \u00faltima atualiza\u00e7\u00e3o da plataforma m\u00f3vel segura GrapheneOS 2024053100, foi adicionada a fun\u00e7\u00e3o de bloqueio de emerg\u00eancia dos dados no dispositivo. O usu\u00e1rio pode definir uma senha adicional e um PIN, cuja inser\u00e7\u00e3o resultar\u00e1 na limpeza de todas as chaves nos armazenamentos de hardware, incluindo as chaves usadas para criptografar dados no armazenamento, al\u00e9m da limpeza da eSIM e reinicializa\u00e7\u00e3o. Assim, em caso de press\u00e3o sobre o usu\u00e1rio e coer\u00e7\u00e3o para desbloquear a tela, ou ao enfrentar a amea\u00e7a de o smartphone cair em m\u00e3os erradas, o propriet\u00e1rio do dispositivo pode inserir o PIN destrutivo e bloquear os dados sem possibilidade de recupera\u00e7\u00e3o de acesso. <\/p>\n

O projeto GrapheneOS desenvolve um fork da base de c\u00f3digo Android (AOSP, Android Open Source Project), ampliado e modificado para fortalecer a seguran\u00e7a e garantir a privacidade. A maioria dos dispositivos atuais do Google Pixel (Pixel 4\/5\/6\/7\/8, Pixel Fold, Pixel Tablet) \u00e9 oficialmente compat\u00edvel. As inova\u00e7\u00f5es do projeto s\u00e3o distribu\u00eddas sob a licen\u00e7a MIT. Inclui muitas tecnologias experimentais relacionadas ao fortalecimento do isolamento de aplicativos, controle detalhado de acesso, bloqueio da explora\u00e7\u00e3o de vulnerabilidades comuns e dificulta\u00e7\u00e3o de exploits. <\/p>\n

Por exemplo, a plataforma utiliza uma implementa\u00e7\u00e3o pr\u00f3pria do malloc e uma vers\u00e3o modificada do libc com prote\u00e7\u00e3o contra corrup\u00e7\u00e3o de mem\u00f3ria, al\u00e9m de uma separa\u00e7\u00e3o mais rigorosa do espa\u00e7o de endere\u00e7amento dos processos. Em vez de JIT, a Android Runtime utiliza apenas compila\u00e7\u00e3o preemptiva (AOT, ahead-of-time). O n\u00facleo do Linux inclui muitos mecanismos adicionais de prote\u00e7\u00e3o, como a adi\u00e7\u00e3o de r\u00f3tulos can\u00e1rio no slub para bloquear o estouro de buffer. Para fortalecer o isolamento de aplicativos, s\u00e3o utilizados o SELinux e o seccomp-bpf. <\/p>\n

\u00c9 poss\u00edvel conceder acesso seletivo a aplicativos espec\u00edficos a opera\u00e7\u00f5es de rede, sensores, lista de contatos e dispositivos perif\u00e9ricos (USB, c\u00e2mera). Por padr\u00e3o, \u00e9 proibido obter informa\u00e7\u00f5es sobre o IMEI, endere\u00e7o MAC, n\u00famero de s\u00e9rie do cart\u00e3o SIM e outros identificadores de hardware. A leitura da \u00e1rea de transfer\u00eancia \u00e9 permitida apenas para aplicativos que est\u00e3o atualmente em foco. Medidas adicionais foram implementadas para isolar processos relacionados ao Wi-Fi e Bluetooth e prevenir vazamentos devido a atividades sem fio. Muitos dos mecanismos de seguran\u00e7a desenvolvidos no projeto foram transferidos para a base de c\u00f3digo principal do Android. <\/p>\n

No GrapheneOS, aplica-se verifica\u00e7\u00e3o criptogr\u00e1fica de componentes carregados e extens\u00f5es criptografia de dados<\/a> no n\u00edvel dos sistemas de arquivos ext4 e f2fs (os dados s\u00e3o criptografados usando AES-256-XTS, enquanto os nomes dos arquivos s\u00e3o criptografados com AES-256-CTS utilizando HKDF-SHA512 para gerar uma chave separada para cada arquivo), e n\u00e3o em dispositivos de bloco. Os dados nas parti\u00e7\u00f5es do sistema e em cada perfil de usu\u00e1rio s\u00e3o criptografados com chaves diferentes. S\u00e3o utilizadas as capacidades de hardware dispon\u00edveis para acelerar as opera\u00e7\u00f5es de criptografia. Na tela de bloqueio, aparece um bot\u00e3o de fim de sess\u00e3o, ap\u00f3s o qual as chaves para a descriptografia s\u00e3o zeradas e o armazenamento \u00e9 colocado em um estado desativado. Existe uma configura\u00e7\u00e3o para proibir a instala\u00e7\u00e3o de aplicativos adicionais em perfis de usu\u00e1rios selecionados. Para prote\u00e7\u00e3o contra tentativas de adivinha\u00e7\u00e3o de senhas, \u00e9 implementado um sistema de atrasos, que varia dependendo do n\u00famero de tentativas falhas (de 30 segundos a 1 dia). <\/p>\n

No GrapheneOS n\u00e3o s\u00e3o inclu\u00eddos aplicativos e servi\u00e7os do Google, nem implementa\u00e7\u00f5es alternativas dos servi\u00e7os do Google, como o microG. Contudo, \u00e9 poss\u00edvel instalar os servi\u00e7os do Google Play em um ambiente isolado, sem privil\u00e9gios especiais. O projeto tamb\u00e9m desenvolve v\u00e1rios aplicativos pr\u00f3prios, focados na prote\u00e7\u00e3o de informa\u00e7\u00f5es e privacidade. Entre eles, est\u00e3o o navegador Vanadium baseado no Chromium, uma vers\u00e3o modificada do mecanismo WebView, um visualizador de PDF seguro, um firewall, o aplicativo Auditor para verifica\u00e7\u00e3o de dispositivos e detec\u00e7\u00e3o de intrus\u00f5es, um aplicativo para c\u00e2mera focado em garantir a privacidade e o sistema de cria\u00e7\u00e3o de backups criptografados Seedvault.
\n
Fonte: opennet.ru<\/a> <\/p>","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"excerpt":{"rendered":"

\u0412 \u043e\u0447\u0435\u0440\u0435\u0434\u043d\u043e\u043c \u043e\u0431\u043d\u043e\u0432\u043b\u0435\u043d\u0438\u0438 \u0437\u0430\u0449\u0438\u0449\u0451\u043d\u043d\u043e\u0439 \u043c\u043e\u0431\u0438\u043b\u044c\u043d\u043e\u0439 \u043f\u043b\u0430\u0442\u0444\u043e\u0440\u043c\u044b GrapheneOS 2024053100 \u043f\u043e\u044f\u0432\u0438\u043b\u0430\u0441\u044c \u0444\u0443\u043d\u043a\u0446\u0438\u044f \u044d\u043a\u0441\u0442\u0440\u0435\u043d\u043d\u043e\u0439 \u0431\u043b\u043e\u043a\u0438\u0440\u043e\u0432\u043a\u0438 \u0434\u0430\u043d\u043d\u044b\u0445 \u043d\u0430 \u0443\u0441\u0442\u0440\u043e\u0439\u0441\u0442\u0432\u0435. \u041f\u043e\u043b\u044c\u0437\u043e\u0432\u0430\u0442\u0435\u043b\u044e \u043f\u0440\u0435\u0434\u043e\u0441\u0442\u0430\u0432\u043b\u0435\u043d\u0430 \u0432\u043e\u0437\u043c\u043e\u0436\u043d\u043e\u0441\u0442\u044c \u0437\u0430\u0434\u0430\u043d\u0438\u044f \u0434\u043e\u043f\u043e\u043b\u043d\u0438\u0442\u0435\u043b\u044c\u043d\u043e\u0433\u043e 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\u043e\u0431\u0440\u0430\u0437\u043e\u043c, \u0432 \u0441\u043b\u0443\u0447\u0430\u0435 \u043e\u043a\u0430\u0437\u0430\u043d\u0438\u044f \u0434\u0430\u0432\u043b\u0435\u043d\u0438\u044f \u043d\u0430 […]<\/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-116317","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\udd47Na plataforma Android, o GrapheneOS agora permite a cria\u00e7\u00e3o de um PIN destrutivo | ProHoster","description":"Na atualiza\u00e7\u00e3o mais recente da plataforma m\u00f3vel segura GrapheneOS 2024053100, foi adicionada 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