{"id":8810,"date":"2024-12-19T08:07:11","date_gmt":"2024-12-19T07:07:11","guid":{"rendered":"https:\/\/www.ipsi.cat\/elfil\/?p=8810"},"modified":"2024-12-19T08:47:55","modified_gmt":"2024-12-19T07:47:55","slug":"desencriptacio-de-xifrats-amb-computacio-quantica","status":"publish","type":"post","link":"https:\/\/www.ipsi.cat\/elfil\/desencriptacio-de-xifrats-amb-computacio-quantica\/","title":{"rendered":"Desencriptaci\u00f3 de xifrats amb computaci\u00f3 qu\u00e0ntica"},"content":{"rendered":"\n<p>La criptografia \u00e9s la disciplina que s\u2019encarrega d\u2019aplicar t\u00e8cniques per protegir la informaci\u00f3. Podem remuntar la criptografia a l&#8217;antic Egipte, on es modificaven alguns escrits jerogl\u00edfics per tal d\u2019amagar informaci\u00f3. M\u00e9s endavant van apar\u00e8ixer altres sistemes de criptografia anal\u00f2gica com per exemple el <a href=\"https:\/\/ca.wikipedia.org\/wiki\/Xifratge_de_C%C3%A8sar\" target=\"_blank\" rel=\"noreferrer noopener\" aria-label=\"xifrat per decalatge de C\u00e8sar (s'obre en una nova pestanya)\">xifrat per decalatge de C\u00e8sar<\/a>, emprat el segle I aC, o la m\u00e0quina Enigma, utilitzada a l\u2019Alemanya nazi per encriptar missatges en l\u2019\u00e0mbit militar.<\/p>\n\n\n\n<p>La criptografia, tot i que fou implementada en temps molt antics, realment va prendre un paper important amb l\u2019arribada de l\u2019era digital. Les dades digitals es transmeten molt f\u00e0cilment i \u00e9s necessari desenvolupar sistemes que permetin xifrar la informaci\u00f3 i desar-la o compartir-la en un entorn de confidencialitat.<\/p>\n\n\n\n<p>Actualment, la criptografia est\u00e0 present en el dia a dia en qualsevol \u00e0mbit digital. Per exemple, en comptes bancaris, documentaci\u00f3 personal (DNI, passaport, adre\u00e7a\u2026), dades de negoci i fins i tot informaci\u00f3 governamental.<\/p>\n\n\n\n<figure class=\"wp-block-image size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"990\" height=\"585\" src=\"https:\/\/www.ipsi.cat\/elfil\/wp-content\/uploads\/2024\/12\/Desencriptacio\u0301-de-xifrats-02.jpg\" alt=\"Desencriptacio\u0301 de xifrats 02\" class=\"wp-image-8818\" srcset=\"https:\/\/www.ipsi.cat\/elfil\/wp-content\/uploads\/2024\/12\/Desencriptacio\u0301-de-xifrats-02.jpg 990w, https:\/\/www.ipsi.cat\/elfil\/wp-content\/uploads\/2024\/12\/Desencriptacio\u0301-de-xifrats-02-300x177.jpg 300w, https:\/\/www.ipsi.cat\/elfil\/wp-content\/uploads\/2024\/12\/Desencriptacio\u0301-de-xifrats-02-768x454.jpg 768w\" sizes=\"auto, (max-width: 990px) 100vw, 990px\" \/><figcaption><em>\u00c0mbits on s\u2019aplica la criptografia<\/em><\/figcaption><\/figure>\n\n\n\n<p><strong>\u00c0mbits on s\u2019aplica la criptografia<\/strong><\/p>\n\n\n\n<p>\u00c9s tanta la import\u00e0ncia de la criptografia en les nostres vides, que s\u2019han creat algorismes molt complexos i elaborats per tal de protegir la informaci\u00f3. Actualment, aquests m\u00e8todes de protecci\u00f3 es realitzen mitjan\u00e7ant operacions matem\u00e0tiques complexes dif\u00edcils de resoldre amb un ordinador convencional. De fet, amb els ordinadors cl\u00e0ssics, aquesta tasca requereix de milers d\u2019anys, la qual cosa ens permet dir que la informaci\u00f3 est\u00e0 protegida de forma \u201csegura\u201d.&nbsp;<\/p>\n\n\n\n<p>Tot i aix\u00f2, \u00faltimament s\u2019est\u00e0 parlant d\u2019una nova tecnologia, la computaci\u00f3 qu\u00e0ntica, que ser\u00e0 capa\u00e7 d\u2019inhabilitar els sistemes de xifrat actuals aprofitant propietats de la mec\u00e0nica qu\u00e0ntica. Aprofitant la paradoxal l\u00f2gica de les part\u00edcules subat\u00f2miques, \u00e9s possible realitzar c\u00e0lculs d\u2019una manera exponencialment m\u00e9s velo\u00e7 que amb ordinadors convencionals.&nbsp;<\/p>\n\n\n\n<figure class=\"wp-block-image size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"794\" height=\"1024\" src=\"https:\/\/www.ipsi.cat\/elfil\/wp-content\/uploads\/2024\/12\/Desencriptacio\u0301-de-xifrats-05-794x1024.jpg\" alt=\"Desencriptacio\u0301 de xifrats 05\" class=\"wp-image-8820\" srcset=\"https:\/\/www.ipsi.cat\/elfil\/wp-content\/uploads\/2024\/12\/Desencriptacio\u0301-de-xifrats-05-794x1024.jpg 794w, https:\/\/www.ipsi.cat\/elfil\/wp-content\/uploads\/2024\/12\/Desencriptacio\u0301-de-xifrats-05-233x300.jpg 233w, https:\/\/www.ipsi.cat\/elfil\/wp-content\/uploads\/2024\/12\/Desencriptacio\u0301-de-xifrats-05-768x990.jpg 768w, https:\/\/www.ipsi.cat\/elfil\/wp-content\/uploads\/2024\/12\/Desencriptacio\u0301-de-xifrats-05.jpg 990w\" sizes=\"auto, (max-width: 794px) 100vw, 794px\" \/><figcaption><em>Ordinador Sherbrooke. Utilitzat per confirmar la hip\u00f2tesi del treball de recerca<\/em><\/figcaption><\/figure>\n\n\n\n<p>L\u2019objectiu principal d\u2019aquest projecte \u00e9s demostrar si la computaci\u00f3 qu\u00e0ntica ser\u00e0 capa\u00e7 de trencar els xifrats criptogr\u00e0fics actuals, i si realment suposa un perill. A m\u00e9s, aquest treball pret\u00e9n demostrar o refutar aquesta afirmaci\u00f3 d\u2019una forma pr\u00e0ctica, \u00e9s a dir, accedint i programant un ordinador qu\u00e0ntic real. Tenint en compte aquests aspectes, la hip\u00f2tesi plantejada \u00e9s la seg\u00fcent:<\/p>\n\n\n\n<p><strong><em>La computaci\u00f3 qu\u00e0ntica \u00e9s en un grau de maduresa suficient perqu\u00e8 un estudiant sense recursos professionals pugui usar-la per a la <\/em><\/strong><em><strong>Desencriptaci\u00f3 de xifrats<\/strong><\/em><strong><em> amb el m\u00e8tode est\u00e0ndard de criptografia RSA.<\/em><\/strong><\/p>\n\n\n\n<p>Per poder fer aquesta recerca s\u2019ha requerit d\u2019una vessant te\u00f2rica molt \u00e0mplia. \u00c9s a dir, per poder confirmar o refutar la hip\u00f2tesi ha estat necessari indagar en \u00e0mbits i disciplines molt complexes, la qual cosa ha requerit d\u2019una etapa pr\u00e8via d\u2019aprenentatge i teoria. Tot aix\u00f2 inclou entendre els fonaments de la f\u00edsica qu\u00e0ntica i com aprofitar-los matem\u00e0ticament, profunditzar en les operacions matem\u00e0tiques que protegeixen la informaci\u00f3 d\u2019avui dia, i finalment comprendre com aprofitar la qu\u00e0ntica per resoldre aquestes operacions.&nbsp;<\/p>\n\n\n\n<figure class=\"wp-block-image size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"990\" height=\"558\" src=\"https:\/\/www.ipsi.cat\/elfil\/wp-content\/uploads\/2024\/12\/Desencriptacio\u0301-de-xifrats-03.jpg\" alt=\"El gat de Schr\u00f6dinger. El gat viu i mort alhora\" class=\"wp-image-8819\" srcset=\"https:\/\/www.ipsi.cat\/elfil\/wp-content\/uploads\/2024\/12\/Desencriptacio\u0301-de-xifrats-03.jpg 990w, https:\/\/www.ipsi.cat\/elfil\/wp-content\/uploads\/2024\/12\/Desencriptacio\u0301-de-xifrats-03-300x169.jpg 300w, https:\/\/www.ipsi.cat\/elfil\/wp-content\/uploads\/2024\/12\/Desencriptacio\u0301-de-xifrats-03-768x433.jpg 768w\" sizes=\"auto, (max-width: 990px) 100vw, 990px\" \/><figcaption>El gat de Schr\u00f6dinger. El gat viu i mort alhora<\/figcaption><\/figure>\n\n\n\n<p>Posteriorment, pel que fa a la part pr\u00e0ctica, \u00e9s necessari trobar acc\u00e9s a ordinadors qu\u00e0ntics, aprendre a programar, i ser capa\u00e7 de traduir operacions qu\u00e0ntiques a codi i viceversa. Tot aix\u00f2, ha estat necessari per executar el codi en un ordinador qu\u00e0ntic, concretament l\u2019ordinador Sherbrooke, situat al Canad\u00e0. Aquesta execuci\u00f3 m\u2019ha perm\u00e8s, finalment, aprofitar les incomprensibles propietats de la f\u00edsica qu\u00e0ntica per la desencriptaci\u00f3 de xifrats i confirmar la hip\u00f2tesi del treball de recerca. <\/p>\n\n\n\n<figure class=\"wp-block-image size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"990\" height=\"307\" src=\"https:\/\/www.ipsi.cat\/elfil\/wp-content\/uploads\/2024\/12\/Desencriptacio\u0301-de-xifrats-01-07.jpg\" alt=\"Desencriptacio\u0301 de xifrats 01 07\" class=\"wp-image-8817\" srcset=\"https:\/\/www.ipsi.cat\/elfil\/wp-content\/uploads\/2024\/12\/Desencriptacio\u0301-de-xifrats-01-07.jpg 990w, https:\/\/www.ipsi.cat\/elfil\/wp-content\/uploads\/2024\/12\/Desencriptacio\u0301-de-xifrats-01-07-300x93.jpg 300w, https:\/\/www.ipsi.cat\/elfil\/wp-content\/uploads\/2024\/12\/Desencriptacio\u0301-de-xifrats-01-07-768x238.jpg 768w\" sizes=\"auto, (max-width: 990px) 100vw, 990px\" \/><figcaption>Resultats de l\u2019execuci\u00f3 final<\/figcaption><\/figure>\n\n\n\n<p>Feu clic <a href=\"https:\/\/www.ipsi.cat\/elfil\/?s=treball+de+recerca\" target=\"_blank\" rel=\"noreferrer noopener\" aria-label=\"a aquest enlla\u00e7 (s'obre en una nova pestanya)\">a aquest enlla\u00e7<\/a> per accedir a d&#8217;altres articles sobre treballs de recerca<\/p>\n<!-- AddThis Advanced Settings generic via filter on the_content --><!-- AddThis Share Buttons generic via filter on the_content -->","protected":false},"excerpt":{"rendered":"<p>Computac\u00f3 qu\u00e0ntica, la innovadora tecnologia que posa en perill la informaci\u00f3<\/p>\n<p><a class=\"more-link\" href=\"https:\/\/www.ipsi.cat\/elfil\/desencriptacio-de-xifrats-amb-computacio-quantica\/\">Read More<\/a><\/p>","protected":false},"author":3,"featured_media":8821,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"wpupg_custom_link":[],"wpupg_custom_link_behaviour":[],"wpupg_custom_link_nofollow":[],"wpupg_custom_image":[],"wpupg_custom_image_id":[],"_genesis_hide_title":false,"_genesis_hide_breadcrumbs":false,"_genesis_hide_singular_image":false,"_genesis_hide_footer_widgets":false,"_genesis_custom_body_class":"","_genesis_custom_post_class":"","_genesis_layout":"","footnotes":""},"categories":[93,734,1],"tags":[81,86,133,142,731,732,733,73,78,65],"class_list":{"0":"post-8810","1":"post","2":"type-post","3":"status-publish","4":"format-standard","5":"has-post-thumbnail","7":"category-darreres-publicacions","8":"category-tr-2324","9":"category-general","10":"tag-ipsi","11":"tag-escola","12":"tag-recerca","13":"tag-treball-de-recerca","14":"tag-computacio","15":"tag-programacio","16":"tag-computacio-quantica","17":"tag-batxillerat","18":"tag-informatica","19":"tag-alumnes","20":"entry"},"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v24.6 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>Desencriptaci\u00f3 de xifrats amb computaci\u00f3 qu\u00e0ntica - ElFil<\/title>\n<meta name=\"description\" content=\"Pot la desencriptaci\u00f3 de xifrats amb ordinadors qu\u00e0ntics suposar una amena\u00e7a per a la protecci\u00f3 de dades? 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