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¿Que es SKS e IKS?

Para explicar que es IKS e SKS, debemos retroceder  en la historia y basarnos en lo que nos cita Wikipedia:

Nagravisión es un proyecto de la empresa de seguridad informática suiza Kudelski Corporation, dirigida por André Kudelski, especializada en cifrado y descifrado de señal MPEG en acceso condicional a ella, base principal de todos los proveedores de televisión por satélite y cable. El proyecto Nagravisión ha tenido varias versiones y numerosos parches de seguridad; conocidas como Nagra 1, Nagra 2 y Nagra 3 han permitido a la empresa superar los inconvenientes de la piratería, que ha dejado en evidencia a la compañía en numerosas ocasiones del pasado.

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-a medida que evoluciona la industria de la piratería, nagravision se ha visto obligado a incrementar su tecnología de encriptación llegando al ahora vigente NAGRA 3, el cual a diferencia del antiguo NAGRA 2 (aquel tiempo que eramos felices con nuestras teles análogas y canales premium SD los cuales abrian decos como el azbos evo xl, o el clon azamerica s810b) en donde cada canal tenía una contraseña FIJA, por lo que no era necesario actualizar nada, este nuevo sistema  se basa en que cada canal se abre con una contraseña que VARÍA cada 10 segundos aproximadamente.

En España se utilizó por primera vez en su variante analógica Nagra+, la cuál era utilizada por Canal+ terrestre, canal que fue reemplazado por Cuatro desde el mes de noviembre de 2005. En los primeros años de emisión de la plataforma de satélite Vía Digital se utilizó el sistema Nagravisión 1, que fue sustituido posteriormente por Nagravisión 2. Tanto los sistemas Nagravisión 1 y Nagravisión 2 tenían numerosos fallos de seguridad graves que permitieron que los sistemas fuesen visionados sin utilizar los descodificadores del distribuidor. Debido a esto TV Cabo (Portugal) decidió adaptar sus sistemas a Nagra 3 a finales de 2007, solucionando hasta la fecha el problema, así como Canal+ (empresa fusión de Vía Digital y Canal Satélite Digital), que desde el 4 de diciembre de 2007 utiliza el nuevo sistema Nagravisión 3. Actualmente la mayor parte de los proveedores Europeos han migrado ya sus sistemas a Nagra 3, incluyendo Premiere (Alemania), que el 12 de octubre de 2008 modificó su sistema de codificación, siendo el último gran proveedor en Europa que conservaba Nagra 2. Digitv, la televisión rumana de pago, otra de las últimas en usar Nagra 2, desde el 5 de agosto del 2010 ha migrado también sus sistemas a Nagra 3.

Por último, el operador español de servicios por cable ONO realizó en el año 2011 la migración parcial de sus señales de televisión digital, conjuntamente y como consecuencia de la introducción de su nuevo descodificador con funciones de PVR, que incorpora el sistema TiVo y también emplea Nagra 3.

A octubre de 2009, en los sistemas de pago por visión, no existe ningún software capaz de penetrar el cifrado de Nagra 3 (a excepción del cardsharing, que lo que hace es usar un deco servidor, que envía las claves de la tarjeta original al deco servidor y sólo se puede visualizarlo con un abono legal). Kudelski Corporation por ahora ha logrado garantizar que sus sistemas de seguridad son fiables. También se ha visto reducido el abanico de servidores que conservan Nagra 2 a los pequeños proveedores de televisión por satélite, como por ejemplo proveedores rumanos.

A enero de 2012, el tema no ha progresado demasiado respecto a la emulación completa del sistema, es decir, ningún aparato es capaz de descifrar la información suministrada por el proveedor, tan solo los sistemas CardSharing permiten acceso condicional compartido, que no es comparable al nivel de acceso que se había conseguido con el antiguo Nagra 2.

-Rescatamos entonces que el sistema no es violado, si no que las llaves al mismo tiempo que se captan, son propagadas de manera espontánea desde un decodificador SERVER a los decos receptores a traves un sistema denominado “cardsharing”. Este se propaga de dos formas:

SKS (Satellite Key Sharing): Obtenemos las llaves a través de un satélite el cual cumple con la función de “reflejar” lo que se nos envía del servidor como un efecto “espejo”. Actualmente el satelite usado para este fin es el SES4, INTELSAT21, AMAZONAS61W.

SISTEMA SKS

IKS: (Internet Key Sharing): Somos abastecidos de llaves a través de Internet.

El decodificador por su parte debe estar en contacto con el satélite proveedor de canales de interés. Para Bolivia por ejemplo, el satélite utilizado es el amazonas. Con esto dejo claro que bajo cualquier método de apertura de canales, un decodificador siempre debe estar conectado a una antena dirigida al satélite el cual se hospeden los canales de interés.

Es por esta razón lo importante que es contar con un decodificador el cual sea abastecido por un server eficaz que le entregue las llaves a tiempo.

Por lo mismo, hemos optado por comercializar solo decodificadores AzAmerica Freesky Freei Nazabox Panthersky que tengan el mejor servicio tanto en calidad de imagen que ofrezcan diversas funcionalidades para otorgar la mejor experiencia en televisión FTA como cualquier otro tipo de uso que el cliente estime conveniente. (como por ejemplo, CARDSHARING el cual necesita de los mejores servers para una estabilidad excepcional)

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