La confianza cero es un concepto ampliamente conocido en ciberseguridad, arraigado en la idea de que ninguna entidad, interna o externa, debe ser considerada como confiable por defecto. Aunque este enfoque tiene sus orígenes en la tecnología de la información (TI), su aplicabilidad se ha extendido recientemente al ámbito de la tecnología operativa (OT), donde los líderes de ciberseguridad están adaptando sus principios a los requisitos únicos de estos entornos.
Orígenes y principios fundamentales
La historia de la confianza cero se remonta al principio de privilegio mínimo (POLP) de mediados de la década de 1970, que aboga por otorgar solo la autoridad necesaria para realizar funciones específicas. Este principio establece la base para la confianza cero al limitar el acceso a datos y recursos únicamente a entidades autorizadas para su propósito legítimo. En esencia, la confianza cero tiene dos objetivos principales: prevenir el acceso no autorizado y minimizar las zonas de confianza explícitas.
Aplicación en entornos de OT
Si bien existen numerosas metodologías para implementar la confianza cero, cada una adaptada a las necesidades específicas de un entorno, es esencial comprender algunos conceptos clave para su implementación en OT.
Comenzar por algún lado: La implementación de confianza cero debe verse como un viaje, priorizando la seguridad y la eficiencia en función de la criticidad y el riesgo de exposición. Se recomienda comenzar con flujos de trabajo individuales y avanzar gradualmente.
Adaptación para OT: Los principios generales de confianza cero en TI, como la desconfianza de cualquier conexión remota y la evaluación continua del acceso, deben modificarse para su aplicación en OT, teniendo en cuenta las limitaciones del entorno.
Obtener Visibilidad: La comprensión completa de los activos, recursos y entidades en un entorno de OT es fundamental para identificar riesgos y priorizar la seguridad. Se deben utilizar sistemas de descubrimiento de activos para este propósito.
Aplicar Controles: Basándose en la visibilidad obtenida, se deben aplicar controles de seguridad en varios puntos, tanto a nivel de endpoint como de red, para limitar el acceso no autorizado y proteger los activos críticos.
Consideraciones Prácticas a Nivel de Red
A nivel de red, la implementación de la confianza cero implica la aplicación de políticas de segmentación estrictas para limitar la comunicación solo a los recursos necesarios. Los dispositivos de red también deben imponer grupos de segmentación para evitar movimientos laterales de los atacantes y la propagación de malware.
Además, es crucial proteger los activos vulnerables sin interrumpir su funcionalidad, utilizando sistemas de prevención de intrusiones y firewalls diseñados específicamente para OT.
Implementar la confianza cero en entornos de OT es un proceso complejo pero necesario para proteger la infraestructura crítica y garantizar la continuidad operativa del negocio. Al comprender los principios fundamentales y adaptar las mejores prácticas de seguridad de TI, las organizaciones pueden fortalecer sus defensas cibernéticas y mitigar los riesgos en entornos de OT.
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and then send the Collector back to the ancestral domain, right There were two or three people with delicate minds whose expressions changed slightly when they heard this.He stretched out his hand and gestured twice casually, demonstrating.
A clear light flashed and fell in front of him, revealing the appearance of a middle aged man his skin was green and his body was unusually tall.It is simply unbelievable. Maybe he wants to do something big and is in too much mood.
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It turned out to be so. The movement and movement of this giant egg are unprecedented in ancient times, and it can be said that it is an unprecedented treasure.1 second remember network. Xi Lerong fell into battle.
At this time, I was wondering why Qingquyu made Gui Wujiu admit the fact.It s just that although this person s character has been completely transformed, after all, his previous foundation was too poor, and he hasn t broken through for a long time, so many of his methods are not proficient.
The dripping water image quickly grew in size and deformed flat, becoming a mirror like surface.In the place where the streams gather in front, there seem to be many visible and invisible fish fry swimming repeatedly in the water, raising stars.
Three breaths later, a man in yellow robe stumbled and jumped into the sky with disheveled hair.
If dianfeng had known that the situation was so complicated, he should not have gotten so close.If it annoys If he killed the people in front of him, Tianjiazhuang might be in danger of annihilation.
The passage was calm and there seemed to be no danger hidden in the depths.There are dangers inside, but when have we, the Ten Kings Palace, ever been afraid of danger Cultivation as an immortal is to fight with the sky.
The situation on the side of the Iron armed Monkey is even worse.If he had said this earlier, it would not have caused any support.
They stayed outside. Seeing something happen to the king, they were unable to do anything.div Zhenren Yuanzhu had followed Zhenjun Chiye for hundreds of years, and he still He had never seen his master like this before.
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The so called treasure was just his own guess. Who knew whether it was true or false Maybe this Qingyang is really talented and can improve his cultivation so quickly, or maybe he has the support of a big shot behind him.Now the space is large enough, and the two parties can not affect each other, and there is a group of monster monkeys in the space, which looks more lively.
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Just that one high grade spirit stone raised Qingyang s cultivation from the eighth level of Qi Refining to the ninth level of Qi Refining.They kept moving their hands and threw countless black chains, frantically strengthening the giant net on Futian Liu.
Especially when the other party is Archimonde, a supernova, there shouldn t be too much information.The Bomb Dragon is very fast. After all, its name has changed from Flying Insect to Flying Dragon.
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Even if they support, they will go to the Wolf Principality, so his example is very important.Among the demon army, the strongest ones are the great demon and the fire elves.
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Each death knight is a commander who can turn a large number of chaotic undead into obedient soldiers.Preparations for the attack are complete. Buzz, buzz The sheath wings vibrated.
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Pass, pass, pass At this moment, among the remaining four orcs, the three at the back suddenly disappeared, and they must have been dragged into the swamp below the grassland.growing up After following him for a while, Eve seemed to be much more intelligent than before.
Whether there are workshops, salt fields, or wheat fields, there are many more during this period.Well, at this time, Zhao Hao couldn t control himself at all, but he also understood that resistance could break him out of this state.
At this time, this mage group composed of coral witches has achieved this perfectly.In this posture, not only will the recovery ability be greatly improved, but also there is no need to worry about being knocked down.
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Wow Under the command of Eve, the Storm began to move towards the next target.
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Of course I m here to deal with the nine headed monster Zhao Hao began to release a war machine.Only now, the Wind King pterosaurs began to enter a fighting state.
The Paladin is just stubborn, but he is not stupid.No one expected that such a powerful Takagi City would be breached in just one day, so it is true that the elves cannot protect themselves.
Find a way to promote it to the Dragon Fly Queen, which is a tactical unit to deal with high level enemies, and the transaction price is not low.But later, Qin Hu drank the wine and fell asleep. When he woke up, he was already in the imperial prison of the inner guard.
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After solving this problem, even if the cleanup mission is completed, he naturally does not need to retain his strength.Just like Freya and Feida, they did not use dragon breath, flames, etc.
No way, although this long range unit only appeared a few times, it played a role in reversing the situation of the battle every time.Because of its huge size, it almost failed to fill up this giant shipyard.
Just follow the same method, the moon blade stabs along the reverse scale.The Mythical Territory was established early, and with the support of the entire alliance, the extent of its development can be imagined.
It looked like a bee. It was about 1. 5 meters tall in a crouching state. It had a pair of thin sheath wings behind it and its whole body was covered with dark fine scales.If it were someone else s hiring mission, Zhao Hao would choose to save trouble and not spend any effort chasing him.
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