For decades, cyber defence was built around a perimeter model - all the security measures are placed around the perimeter, leaving the internal network wide open. A single weak spot in the perimeter could cause an attacker to move freely inside the corporate network.
In 2009 this reality became very apparent. A nation-sponsored cyberattack dubbed "Operation Aurora" exploited a zero-day vulnerability and gained access to corporate networks and proprietary data of multiple organizations. In response to this Google, one of the victims, started to implement a zero trust security model called "BeyondCorp".
But what makes the zero trust architecture so secure? It rests on a simple idea:
"Never trust, always verify"
Every device, user and application must continuously prove their identity and access rights - even within the network - and every communication must be validated and monitored.
What are the main principles of a zero trust architecture?
Today the Zero Trust Architecture is particularly relevant - especially as the perimeter architecture is by today's standards completely obsolete. Cloud adoption, mobile devices and third-party integrations create a very complex network topology where all communication must be treated the same: untrusted until verified.
Zero Trust - unlike the name suggests - doesn't mean "trust no one". It means that trust is no longer a default, instead it must be continuously earned and verified, all while planning for the worst-case scenario. This doesn't just secure the network, it builds resilience.
Author: Marcello Carboni, Cyber Security Specialist, 8 West Consulting
https://www.linkedin.com/in/marcello-carboni-b01228186/