{"id":15700,"date":"2023-12-06T16:24:57","date_gmt":"2023-12-06T16:24:57","guid":{"rendered":"https:\/\/promoguy.nl\/vocabulary\/proof-of-work\/"},"modified":"2023-12-06T16:24:57","modified_gmt":"2023-12-06T16:24:57","slug":"proof-of-work","status":"publish","type":"entity","link":"https:\/\/promoguy.nl\/es\/blog\/vocabulary\/proof-of-work\/","title":{"rendered":"Prueba de trabajo"},"content":{"rendered":"<p>Un sistema (o protocolo, o funci\u00f3n) de prueba de trabajo (proof-of-work, POW) es una medida econ\u00f3mica para disuadir de ataques de denegaci\u00f3n de servicio y otros abusos de servicios, como el spam, en una red, exigiendo cierto trabajo al solicitante del servicio, lo que suele significar tiempo de procesamiento por parte de un ordenador.  El concepto se debe a Dwork y Naor. Una caracter\u00edstica clave de estos esquemas es su asimetr\u00eda: el trabajo debe ser moderadamente dif\u00edcil (pero factible) para el solicitante, pero f\u00e1cil de comprobar para el proveedor del servicio. Esta idea tambi\u00e9n se conoce como funci\u00f3n de coste de la CPU, rompecabezas del cliente, rompecabezas computacional o funci\u00f3n de precio de la CPU. Es distinto de un CAPTCHA, que est\u00e1 pensado para que un humano lo resuelva r\u00e1pidamente, en lugar de un ordenador. Un sistema popular -utilizado en la miner\u00eda de Bitcoin y Hashcash- utiliza inversiones parciales de hash para demostrar que se ha realizado un trabajo, como muestra de buena voluntad para enviar un correo electr\u00f3nico. Por ejemplo, la siguiente cabecera representa unos 252 c\u00e1lculos hash para enviar un mensaje a calvin@comics.net el 19 de enero de 2038: X-Hashcash: 1:52:380119:calvin@comics.net:::9B760005E92F0DAE Se verifica con un solo c\u00e1lculo comprobando que el hash SHA-1 del sello (omitir la parte \"X-Hashcash: \") empieza por 52 ceros binarios, es decir, 13 ceros hexadecimales: 0000000000000756af69e2ffbdb930261873cd71 Est\u00e1 sujeto a debate si los sistemas POW pueden realmente resolver un problema concreto de denegaci\u00f3n de servicio, como el problema del spam; el sistema debe hacer que el env\u00edo de mensajes de spam sea manifiestamente improductivo para el spammer, pero tampoco debe impedir que los usuarios leg\u00edtimos env\u00eden sus mensajes. Los sistemas de prueba de trabajo se utilizan como primitiva en otros sistemas criptogr\u00e1ficos m\u00e1s complejos, como Bitcoin, que utiliza un sistema similar a Hashcash.<\/p>","protected":false},"excerpt":{"rendered":"<p>A proof-of-work (POW) system (or protocol, or function) is an economic measure to deter denial of service attacks and other service abuses such as spam on a network by requiring some work from the service requester, usually meaning processing time by a computer. The concept is due to Dwork and Naor. A key feature of [&hellip;]<\/p>\n","protected":false},"author":2,"featured_media":0,"comment_status":"","ping_status":"closed","template":"","meta":{"_acf_changed":false,"wl_entities_gutenberg":"","footnotes":""},"categories":[],"wl_entity_type":[39],"class_list":["post-15700","entity","type-entity","status-publish","hentry","wl_entity_type-thing"],"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO Premium plugin v28.0 (Yoast SEO v28.0) - https:\/\/yoast.com\/product\/yoast-seo-premium-wordpress\/ -->\n<title>Proof-of-work - Promoguy Digital Marketing Agency<\/title>\n<meta name=\"robots\" content=\"noindex, follow\" \/>\n<meta property=\"og:locale\" content=\"es_ES\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Proof-of-work\" \/>\n<meta property=\"og:description\" content=\"A proof-of-work (POW) system (or protocol, or function) is an economic measure to deter denial of service attacks and other service abuses such as spam on a network by requiring some work from the service requester, usually meaning processing time by a computer. 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