{"id":618,"date":"2021-04-06T00:00:00","date_gmt":"2021-04-06T00:00:00","guid":{"rendered":"http:\/\/idlayr-com.stackstaging.com\/2021\/04\/06\/5-things-you-didnt-know-about-sms-login-security\/"},"modified":"2025-07-01T08:11:58","modified_gmt":"2025-07-01T08:11:58","slug":"5-cosas-que-no-sabias-sobre-la-seguridad-del-inicio-de-sesion-sms","status":"publish","type":"post","link":"https:\/\/idlayr.com\/es\/blog\/5-cosas-que-no-sabias-sobre-la-seguridad-del-inicio-de-sesion-sms\/","title":{"rendered":"5 cosas que no sab\u00edas sobre la seguridad del inicio de sesi\u00f3n por SMS"},"content":{"rendered":"<p>La autenticaci\u00f3n de dos factores (2FA) es una medida de seguridad esencial para cualquier servicio en el que se inicie sesi\u00f3n. Para autenticar los inicios de sesi\u00f3n y las transacciones en aplicaciones m\u00f3viles, el uso de SMS para verificar los n\u00fameros de tel\u00e9fono se ha convertido en la norma.<br \/>\n\u200d<\/p>\n<p>Con este m\u00e9todo, se env\u00eda al n\u00famero de tel\u00e9fono esperado del usuario un mensaje de texto con una OTP (contrase\u00f1a de un solo uso), y si el usuario introduce la OTP correcta de nuevo en la aplicaci\u00f3n, se asume que es el propietario del tel\u00e9fono.<br \/>\n\u200d<\/p>\n<p>Pero si tu aplicaci\u00f3n m\u00f3vil utiliza SMS OTP para verificar a tus usuarios, hay algunos aspectos esenciales de seguridad que realmente necesitas saber sobre c\u00f3mo funciona este sistema entre bastidores. Sigue leyendo...<\/p>\n<p>\u200d<\/p>\n<h3>1. Los SMS no est\u00e1n encriptados<\/h3>\n<p>Cuando se transmite informaci\u00f3n segura en Internet, como contrase\u00f1as, los datos suelen cifrarse, es decir, se transforman de su forma original (\"texto plano\") a una forma codificada (\"texto cifrado\") a la que s\u00f3lo pueden acceder las partes autorizadas.<br \/>\n\u200d<\/p>\n<p>Sin embargo, los SMS funcionan con Signalling System 7, un protocolo de comunicaci\u00f3n entre m\u00e1quinas de 1975 que no se dise\u00f1\u00f3 pensando en la intervenci\u00f3n humana. Esto significa que cualquiera que pueda acceder a una red puede ver los mensajes SMS -incluida informaci\u00f3n sensible como los c\u00f3digos 2FA- en texto plano.<\/p>\n<p>\u200d<\/p>\n<h3>2. Es posible que nunca se env\u00eden mensajes SMS\u200d.<\/h3>\n<p>Los SMSC (Centros SMS) funcionan mediante la t\u00e9cnica de \"almacenamiento y reenv\u00edo\". Reciben el mensaje del remitente, lo guardan e intentan reenviar una copia al destinatario en el mejor de los casos (m\u00e1s informaci\u00f3n en <a href=\"https:\/\/idlayr.com\/es\/blog\/el-onboarding-movil-le-esta-costando-usuarios\/\">aqu\u00ed<\/a>).<br \/>\n\u200d<\/p>\n<p>Adem\u00e1s de los obvios problemas de seguridad cuando se trata de informaci\u00f3n confidencial, como los c\u00f3digos de restablecimiento de contrase\u00f1a, esto tambi\u00e9n significa que, en algunos casos, el mensaje simplemente nunca llega, por lo que sigue siendo necesaria la opci\u00f3n de \"reenviar c\u00f3digo\".<\/p>\n<p>&nbsp;<\/p>\n<h3>3. Los estafadores pueden suplantar la identidad de su empresa\u200d.<\/h3>\n<p>Seguro que alguna vez has recibido un SMS en el que el remitente es tu banco, tu oficina de correos o tu farmacia, a pesar de no tener los datos de esa empresa guardados en tu tel\u00e9fono. Esto es posible porque la mayor\u00eda de los operadores de redes m\u00f3viles admiten el uso de remitentes alfanum\u00e9ricos como origen de los SMS. Conseguido con \"software de pasarela de SMS\", esto tiene or\u00edgenes leg\u00edtimos: es conveniente para una empresa identificarse cuando env\u00eda informaci\u00f3n importante a los usuarios en masa, ya que los clientes podr\u00edan ignorar un n\u00famero de tel\u00e9fono aleatorio.<br \/>\n\u200d<\/p>\n<p>Por desgracia, como suele ocurrir, esta tecnolog\u00eda ha sido utilizada por delincuentes para hacerse pasar por una empresa y robar informaci\u00f3n. Como hay pocos controles, es posible que recibas un SMS que dice ser de un remitente sin ninguna asociaci\u00f3n real. Los atacantes se hacen pasar por bancos y empresas, intentando enga\u00f1ar a los usuarios para que sigan un enlace malicioso o respondan con informaci\u00f3n personal o financiera.<br \/>\n\u200d<\/p>\n<figure class=\"w-richtext-figure-type- w-richtext-align-center\" data-rt-type=\"\" data-rt-align=\"center\">\n<div><img decoding=\"async\" src=\"https:\/\/idlayr.com\/wp-content\/uploads\/2023\/12\/61094c140d6a350d9cbeae24_60a689715d317d70009b8590_Screenshot202021-04-0620at2017.15.06.png\" width=\"auto\" height=\"auto\" \/><\/div><figcaption>Foto de <a href=\"https:\/\/unsplash.com\/@frostroomhead?utm_source=unsplash&amp;utm_medium=referral&amp;utm_content=creditCopyText\">Rodion Kutsaev<\/a> en <a href=\"https:\/\/unsplash.com\/?utm_source=unsplash&amp;utm_medium=referral&amp;utm_content=creditCopyText\">Unsplash<\/a><\/figcaption><\/figure>\n<h3><\/h3>\n<h3>4. El fraude del intercambio de SIM elude completamente el SMS 2FA\u200d.<\/h3>\n<p>La buena noticia es que la probabilidad de que un atacante irrumpa en la red SS7 para encontrar informaci\u00f3n 2FA es bastante baja. Pero, por desgracia, cada vez hay m\u00e1s casos de fraude por intercambio de tarjetas SIM, una forma m\u00e1s sofisticada de robar esta informaci\u00f3n.<br \/>\n\u200d<\/p>\n<p>En un ataque de intercambio de tarjetas SIM, el estafador sobornar\u00e1 a un empleado de la empresa de telecomunicaciones o utilizar\u00e1 ingenier\u00eda social para asumir la identidad del objetivo, diciendo que ha perdido su tel\u00e9fono y quiere cambiar a una nueva tarjeta SIM.<br \/>\n\u200d<\/p>\n<p>Esto significa que todos los mensajes y llamadas dirigidos al n\u00famero de tel\u00e9fono de la v\u00edctima se desv\u00edan al atacante, que activa r\u00e1pidamente la seguridad basada en SMS para acceder a las cuentas financieras y restablecer las contrase\u00f1as antes de que la v\u00edctima pueda actuar.<\/p>\n<p>\u200d<\/p>\n<h3>5. Ya no es necesario utilizar SMS para la autenticaci\u00f3n m\u00f3vil<\/h3>\n<p>Est\u00e1 claro que confiar en los c\u00f3digos, especialmente a trav\u00e9s de un m\u00e9todo tan inseguro como el SMS, es un error. Pero otros m\u00e9todos, como la autenticaci\u00f3n biom\u00e9trica y por hardware o la descarga de aplicaciones externas, no son universales: no puedes esperar que todos tus usuarios los adopten.<br \/>\n\u200d<\/p>\n<p>Por suerte, ahora existe un m\u00e9todo de autenticaci\u00f3n m\u00f3vil que tiene todas las ventajas de los SMS sin ninguno de los problemas de seguridad o UX.<br \/>\n\u200d<\/p>\n<p>Con una soluci\u00f3n IDlayr, lo \u00fanico que necesita de su usuario es permiso para procesar su n\u00famero de tel\u00e9fono. Es muy sencillo: el usuario solo tiene que introducir su n\u00famero de tel\u00e9fono m\u00f3vil y la aplicaci\u00f3n se comunica al instante con el MNO (operador de red m\u00f3vil) para verificar que ese n\u00famero es el que est\u00e1 vinculado a esa SIM. Se trata de una autenticaci\u00f3n invisible y sin fricciones que al usuario le parece m\u00e1gica, y que adem\u00e1s puede mitigar los fraudes por cambio de SIM.<\/p>","protected":false},"excerpt":{"rendered":"<p>Si su aplicaci\u00f3n m\u00f3vil env\u00eda c\u00f3digos SMS para verificar a los usuarios, debe conocer...<\/p>","protected":false},"author":16,"featured_media":332,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[58,37],"tags":[],"class_list":["post-618","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-cybersecurity","category-sms"],"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO Premium plugin v27.6 (Yoast SEO v28.4) - https:\/\/yoast.com\/product\/yoast-seo-premium-wordpress\/ -->\n<title>5 things you didn\u2019t know about SMS login security<\/title>\n<meta name=\"description\" content=\"If your 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