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# The Odyssey’s Trojan Horse is a 3,000-Year-Old Lesson in Cybersecurity
- URL: https://www.danreshef.com/the-odysseys-trojan-horse-is-a-3-000-year-old-lesson-in-cybersecurity/
- Published: 2026-08-03T21:22:00.000Z
- Updated: 2026-08-27T21:28:09.000Z
- Description: The Greeks didn’t breach Troy’s defenses. They created a story persuasive enough that the Trojans dismantled their own defenses.
- Author: Dan Reshef
- Tags: Technology & Judgment, #spotlight, Cybersecurity, The Odyssey

Warning: Minor spoilers for the movie and the texts behind it. This is part one of a series looking at cybersecurity and AI governance through the lens of The Odyssey.  
  
I recently watched Christopher Nolan’s film: The Odyssey. The IMAX presentation was impressive, and I enjoyed the novelty of Nolan’s perspective from inside the Trojan Horse.  
  
But the Trojan Horse scene left me wondering: Why would the Trojans drag an enormous, uninspected, enemy-built object through the walls of a city that had just survived a ten-year siege?  
  
In the movie, Odysseus, played by Matt Damon, has Sinon, played by Elliot Page, to stay behind and explain the horse.  
  
Sinon’s entire explanation to the Trojans: “A gift. For Athena.”  
  
It remains to be seen if the film wins an Oscar for Best Adapted Screenplay, but I doubt Sinon would have convinced you… But apparently, convincing one Trojan soldier was enough to approve the budget, assign the personnel, waive inspection, and start the project.  
  
I assumed the ancient sources offered a better explanation. So I went looking.  
The Sinon dialogue is not in Homer’s Odyssey. But I remembered the name from Dante’s Inferno. Turns out it’s the same Sinon, and we find him being punished among the falsifiers in the eighth circle of Hell. An annotation in my Hollander translation of Inferno directed me to Book II of Virgil’s Aeneid.  
  
Virgil gives us the missing context: Before the horse was built, Odysseus and Diomedes had stolen the Palladium, a sacred image associated with Athena’s protection of Troy. And Sinon uses that truth as the foundation for a larger lie.  
Captured and brought before King Priam, Sinon claims he is a Greek deserter who escaped after Odysseus arranged for him to be selected as a human sacrifice. Priam believes him, removes his restraints, and grants him protection.  
Sinon has transformed himself from enemy combatant into protected guest before explaining anything about the horse.  
  
Sinon claims the Greeks built it to regain Athena’s favor after desecrating the Palladium. And the Greeks deliberately made it too large for Troy’s gates because they feared that if the Trojans brought it inside, Athena’s protection would also transfer to them.  
  
If they destroy it, and Troy invites divine punishment, but if they bring it inside, Troy inherits divine protection. The horse’s extreme size becomes proof that the Greeks want it kept outside.  
  
The Greeks didn’t defeat Troy’s protections.  
  
They persuaded the Trojans to dismantle them.