{"id":120904,"date":"2024-12-09T15:46:00","date_gmt":"2024-12-09T13:46:00","guid":{"rendered":"https:\/\/prohoster.info\/blog\/novosti-interneta\/lets-encrypt-prekrashhaet-podderzhku-protokola-ocsp-dlya-proverki-otozvannyh-sertifikatov"},"modified":"2024-12-09T15:46:00","modified_gmt":"2024-12-09T13:46:00","slug":"lets-encrypt-prekrashhaet-podderzhku-protokola-ocsp-dlya-proverki-otozvannyh-sertifikatov","status":"publish","type":"post","link":"https:\/\/prohoster.info\/it\/blog\/news\/lets-encrypt-prekrashhaet-podderzhku-protokola-ocsp-dlya-proverki-otozvannyh-sertifikatov","title":{"rendered":"Let&apos;s Encrypt interrompe il supporto del protocollo OCSP per la verifica dei certificati revocati","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"<p>Il centro di certificazione senza scopo di lucro Let's Encrypt, gestito dalla comunit\u00e0 e che fornisce certificati gratuitamente a chiunque ne faccia richiesta, ha deciso di interrompere il supporto per il protocollo OCSP (Online Certificate Status Protocol), utilizzato per verificare la revoca dei certificati. In sostituzione del protocollo OCSP, si propone di utilizzare le liste dei certificati revocati (CRL - Certificate Revocation List), pubblicate dal servizio Let's Encrypt a partire dal 2022. Il 7 maggio 2025, Let's Encrypt disabiliter\u00e0 l'aggiunta di riferimenti agli indirizzi OCSP nei certificati emessi e interromper\u00e0 l'elaborazione di richieste relative all'uso dell'estensione \"OCSP Must Staple\". Il 6 agosto 2025, i gestori delle richieste OCSP saranno disattivati sui server.      <\/p>\n<p>Come motivo per la cessazione del supporto a OCSP viene citata la preoccupazione per la privacy. L'uso di OCSP porta al fatto che ad ogni stabilimento di una connessione protetta, per verificare la validit\u00e0 del certificato, il sistema del cliente invia una richiesta al server OCSP dell'autorit\u00e0 di certificazione che ha generato il certificato. In risposta, il server fornisce informazioni su se sia possibile fidarsi del certificato in questione. Il problema \u00e8 che l'autorit\u00e0 di certificazione riceve informazioni su quando e quali siti visita l'utente in relazione al suo <a class=\"wpil_keyword_link\" href=\"https:\/\/prohoster.info\/it\/lir\/ipv4\/\"   title=\"indirizzo IP\" data-wpil-keyword-link=\"linked\"  data-wpil-monitor-id=\"613\">indirizzo IP<\/a>, cosa che pu\u00f2 essere considerata una fuga di dati riservati. Inoltre, l'uso di OCSP porta a ritardi nell'elaborazione della richiesta, richiede un accesso di rete garantito da parte dell'utente e crea dipendenze dal funzionamento ininterrotto dei server OCSP.     <\/p>\n<p>Per risolvere i problemi di privacy nella verifica della revoca dei certificati \u00e8 stata sviluppata la tecnologia OCSP Stapling, il cui obiettivo \u00e8 che le risposte OCSP certificate dall'autorit\u00e0 di certificazione possano essere inviate ai server che gestiscono i siti durante la negoziazione della connessione TLS con il cliente (il trasferimento delle informazioni OCSP \u00e8 spostato su <a class=\"wpil_keyword_link\" href=\"https:\/\/prohoster.info\/it\/server\/\"   title=\"servers\" data-wpil-keyword-link=\"linked\"  data-wpil-monitor-id=\"1975\">servers<\/a> siti, il che esclude il sistema del cliente da un accesso diretto al server OCSP dell'autorit\u00e0 di certificazione, mentre la correttezza delle risposte \u00e8 garantita dalla firma digitale dell'autorit\u00e0 di certificazione).     <\/p>\n<p>Oltre al OCSP Stapling, esiste un'estensione \"OCSP Must Staple\" che viene aggiunta nei certificati e che obbliga i browser a utilizzare la tecnica OCSP Stapling invece di collegarsi direttamente ai server OCSP, richiedendo di considerare il certificato non affidabile se il server del sito non restituisce una risposta OCSP firmata. Sfortunatamente, l'estensione \"Must Staple\" non ha ricevuto ampia diffusione tra i browser, e la tecnologia OCSP Stapling dipende dalla necessit\u00e0 di abilitare esplicitamente il supporto sul lato del server HTTP (su nginx \u00e8 supportato dal 2013).    <\/p>\n<p>Quando si utilizza la CRL, la verifica della revoca dei certificati avviene sulla macchina locale tramite le liste generate dall'autorit\u00e0 di certificazione. Gli svantaggi di questo approccio sono il grande volume di dati da scaricare e l'insorgere di un'interruzione temporanea nell'aggiornamento delle informazioni (ad esempio, su Firefox i dati vengono aggiornati ogni 6 ore). Il problema della dimensione \u00e8 stato risolto nei browser tramite il proxying delle CRL sui server dei produttori di browser - all'interno dei browser viene inclusa una CRL di base, che viene periodicamente sincronizzata con l'elenco attuale (solo i dati modificati vengono trasferiti al sistema cliente). Per ridurre le dimensioni del database della CRL, viene impiegata una struttura probabilistica \"filtro di Bloom\", che consente di mantenere l'intero database della CRL dalla parte del cliente in una rappresentazione molto compatta. In Firefox, una tecnica simile \u00e8 realizzata utilizzando gli strumenti CRLite, mentre in Chrome - CRLSets.<br \/>\n<br \/>Fonte: <a content=\"nofollow\" rel=\"nofollow\" href=\"https:\/\/www.opennet.ru\/opennews\/art.shtml?num=62373\">opennet.ru<\/a> <\/p>","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"excerpt":{"rendered":"<p>\u041d\u0435\u043a\u043e\u043c\u043c\u0435\u0440\u0447\u0435\u0441\u043a\u0438\u0439 \u0443\u0434\u043e\u0441\u0442\u043e\u0432\u0435\u0440\u044f\u044e\u0449\u0438\u0439 \u0446\u0435\u043d\u0442\u0440 Let&#8217;s Encrypt, \u043a\u043e\u043d\u0442\u0440\u043e\u043b\u0438\u0440\u0443\u0435\u043c\u044b\u0439 \u0441\u043e\u043e\u0431\u0449\u0435\u0441\u0442\u0432\u043e\u043c \u0438 \u043f\u0440\u0435\u0434\u043e\u0441\u0442\u0430\u0432\u043b\u044f\u044e\u0449\u0438\u0439 \u0441\u0435\u0440\u0442\u0438\u0444\u0438\u043a\u0430\u0442\u044b \u0431\u0435\u0437\u0432\u043e\u0437\u043c\u0435\u0437\u0434\u043d\u043e \u0432\u0441\u0435\u043c \u0436\u0435\u043b\u0430\u044e\u0449\u0438\u043c, \u043f\u0440\u0438\u043d\u044f\u043b \u0440\u0435\u0448\u0435\u043d\u0438\u0435 \u043f\u0440\u0435\u043a\u0440\u0430\u0442\u0438\u0442\u044c \u043f\u043e\u0434\u0434\u0435\u0440\u0436\u043a\u0443 \u043f\u0440\u043e\u0442\u043e\u043a\u043e\u043b\u0430 OCSP (Online Certificate Status Protocol), \u043f\u0440\u0438\u043c\u0435\u043d\u044f\u0435\u043c\u043e\u0433\u043e \u0434\u043b\u044f \u043f\u0440\u043e\u0432\u0435\u0440\u043a\u0438 \u043e\u0442\u0437\u044b\u0432\u0430 \u0441\u0435\u0440\u0442\u0438\u0444\u0438\u043a\u0430\u0442\u043e\u0432. \u0412\u043c\u0435\u0441\u0442\u043e \u043f\u0440\u043e\u0442\u043e\u043a\u043e\u043b\u0430 OCSP \u043f\u0440\u0435\u0434\u043b\u0430\u0433\u0430\u0435\u0442\u0441\u044f \u0438\u0441\u043f\u043e\u043b\u044c\u0437\u043e\u0432\u0430\u0442\u044c \u0441\u043f\u0438\u0441\u043a\u0438 \u043e\u0442\u043e\u0437\u0432\u0430\u043d\u043d\u044b\u0445 \u0441\u0435\u0440\u0442\u0438\u0444\u0438\u043a\u0430\u0442\u043e\u0432 (CRL &#8212; Certificate Revocation List), \u043f\u0443\u0431\u043b\u0438\u043a\u0443\u0435\u043c\u044b\u0435 \u0441\u0435\u0440\u0432\u0438\u0441\u043e\u043c Let&#8217;s Encrypt \u043d\u0430\u0447\u0438\u043d\u0430\u044f \u0441 2022 \u0433\u043e\u0434\u0430. 7 \u043c\u0430\u044f 2025 \u0433\u043e\u0434\u0430 Let&#8217;s Encrypt [&hellip;]<\/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-120904","post","type-post","status-publish","format-standard","hentry","category-news"],"aioseo_notices":[],"aioseo_head":"\n\t\t<!-- All in One SEO 5.0.1.1 - aioseo.com -->\n\t<meta name=\"description\" content=\"\u041d\u0435\u043a\u043e\u043c\u043c\u0435\u0440\u0447\u0435\u0441\u043a\u0438\u0439 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