{"id":74249,"date":"2020-03-15T20:42:16","date_gmt":"2020-03-15T17:42:16","guid":{"rendered":"https:\/\/prohoster.info\/blog\/novosti-interneta\/issledovanie-dlya-bezopasnosti-shestiznachnye-pin-kody-ne-luchshe-chem-chetyrehznachnye"},"modified":"2020-03-15T20:42:16","modified_gmt":"2020-03-15T17:42:16","slug":"issledovanie-dlya-bezopasnosti-shestiznachnye-pin-kody-ne-luchshe-chem-chetyrehznachnye","status":"publish","type":"post","link":"https:\/\/prohoster.info\/pt\/blog\/news\/issledovanie-dlya-bezopasnosti-shestiznachnye-pin-kody-ne-luchshe-chem-chetyrehznachnye","title":{"rendered":"Pesquisa: para seguran\u00e7a, c\u00f3digos PIN de seis d\u00edgitos n\u00e3o s\u00e3o melhores do que os de quatro d\u00edgitos","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"

Uma equipe de pesquisadores germano-americana, com a participa\u00e7\u00e3o de volunt\u00e1rios verificou<\/a><\/noindex> e comparou a seguran\u00e7a de PINs de seis e quatro d\u00edgitos para bloquear smartphones. No caso de perda ou roubo do smartphone, \u00e9 melhor ter a certeza de que as informa\u00e7\u00f5es estar\u00e3o protegidas contra invas\u00e3o. Ser\u00e1 que \u00e9 assim?<\/p>\n

\"Pesquisa:<\/p>\n

Philipp Markert, do Instituto de Seguran\u00e7a de TI Horst G\u00f6rtz da Universidade de Bochum, e Maximilian Golla, do Instituto de Seguran\u00e7a e Privacidade Max Planck, descobriram que, na pr\u00e1tica, a psicologia prevalece sobre a matem\u00e1tica. Do ponto de vista matem\u00e1tico, a confiabilidade dos PINs de seis d\u00edgitos \u00e9 significativamente maior do que a dos de quatro d\u00edgitos. No entanto, os usu\u00e1rios preferem certas combina\u00e7\u00f5es de n\u00fameros, por isso alguns PINs s\u00e3o usados com mais frequ\u00eancia, e isso praticamente apaga a diferen\u00e7a de complexidade entre os c\u00f3digos de seis e quatro d\u00edgitos.<\/p>\n

No estudo, os participantes dos experimentos usaram dispositivos Apple ou Android e configuraram PINs de quatro ou seis d\u00edgitos. Nos dispositivos Apple a partir da vers\u00e3o iOS 9, foi introduzida uma lista negra de combina\u00e7\u00f5es num\u00e9ricas proibidas para PINs, cuja escolha \u00e9 automaticamente bloqueada. Os pesquisadores tinham em m\u00e3os ambas as listas negras (para c\u00f3digos de 6 e 4 d\u00edgitos) e realizavam tentativas de combina\u00e7\u00f5es em um computador. A lista negra fornecida pela Apple dos PINs de 4 d\u00edgitos continha 274 n\u00fameros, e a de 6 d\u00edgitos, 2910.<\/p>\n

Para os dispositivos Apple, o usu\u00e1rio tem 10 tentativas para inserir o PIN. Segundo os pesquisadores, nesse caso, a lista negra praticamente n\u00e3o faz sentido. Ap\u00f3s 10 tentativas, ficou dif\u00edcil adivinhar o n\u00famero correto, mesmo que seja muito simples (como 123456). Para dispositivos Android, em 11 horas, \u00e9 poss\u00edvel realizar 100 tentativas de inser\u00e7\u00e3o do PIN, e nesse caso a lista negra j\u00e1 se torna um meio mais confi\u00e1vel de impedir que o usu\u00e1rio insira uma combina\u00e7\u00e3o simples e de evitar o roubo do smartphone por meio da tentativa de adivinha\u00e7\u00e3o.<\/p>\n

<\/center><\/p>\n

No experimento, 1220 participantes escolheram seus pr\u00f3prios PINs, enquanto os experimentadores tentaram adivinhar os c\u00f3digos em 10, 30 ou 100 tentativas. A combina\u00e7\u00e3o foi testada de duas maneiras. Se a lista negra fosse ativada, os smartphones eram atacados sem usar os n\u00fameros da lista. Com a lista negra desativada, a tentativa de adivinha\u00e7\u00e3o come\u00e7ava a partir dos n\u00fameros da lista negra (os mais frequentemente utilizados). Durante o experimento, ficou evidente que um PIN de 4 d\u00edgitos escolhido de forma criteriosa \u00e9 suficientemente seguro e at\u00e9 um pouco mais confi\u00e1vel do que um de 6 d\u00edgitos, quando as tentativas s\u00e3o limitadas.<\/p>\n

Os PINs de 4 d\u00edgitos mais comuns foram as combina\u00e7\u00f5es 1234, 0000, 1111, 5555 e 2580 (que forma uma coluna vertical no teclado num\u00e9rico). Uma an\u00e1lise mais aprofundada revelou que a lista negra ideal para PINs de quatro d\u00edgitos deve conter cerca de 1000 entradas e diferir um pouco daquela que foi gerada para dispositivos Apple.<\/p>\n

\"Pesquisa:<\/p>\n

Finalmente, os pesquisadores descobriram que PINs de 4 e 6 d\u00edgitos s\u00e3o menos seguros do que senhas, mas mais confi\u00e1veis do que um bloqueio gr\u00e1fico de smartphones (por meio de padr\u00f5es). O relat\u00f3rio completo da pesquisa<\/a><\/noindex> ser\u00e1 apresentado em S\u00e3o Francisco em maio de 2020 na confer\u00eancia IEEE Symposium on Security and Privacy.<\/p>\n

<\/p>\n

<\/center><\/p>\n

\t\t\t\t


\n\t\t\t\t\t\t\t\t<\/center>
Fonte: 3dnews.ru<\/a> <\/p>","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"excerpt":{"rendered":"

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