City siege 4 hack portable#
And that’s exactly what Brocious did on stage at the conference in front of hundreds of people, using a small portable programmer he had built for less than $50.īrocious presented his findings and published the code that ran his device in hopes that the public would understand the scope of the threat and that Onity would move quickly to counteract the exploit.
This meant, in theory, that if you could find a way to access a lock’s memory-perhaps through the lock’s special port-you could retrieve the key code and use it to open the lock without a keycard.
What Brocious didn’t expect to find was that the code to open each lock was stored in the lock’s memory. If a lock’s batteries have died, hotels have “portable programmer” devices that can open the lock by physically connecting to it through a special port and supplying the code that way. When a user inserts their keycard in the lock, the key supplies the code that opens it. A startup that hoped to compete with Onity had hired Brocious to reverse-engineer Onity’s keycard lock and develop a cheaper alternative.īrocious discovered, as he no doubt expected, that each Onity lock has a unique cryptographic code that triggers it to open. The lock, manufactured by a firm named Onity, was installed on millions of hotel-room doors across the United States and around the world.
Vulnerability he’d accidentally discovered in a widely used electronic door lock. He got on stage at the Black Hat hacker conference in Las Vegas and demonstrated a security
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