A cybersecurity expert has revealed a concerning method by which criminals can replicate house keys using readily available 3D printing technology, a process that can be initiated with just a photograph of the key.
Evan Ottinger, who specializes in offensive security across government and commercial sectors, demonstrated how a social media post featuring a person's keys could be exploited. In a viral video, Ottinger showed himself recreating his own key from a selfie. The process involved importing the key image into a coding program and then using a 3D printer to generate an exact replica.
Ottinger tested the replicated key on his own locked door, confirming its functionality and highlighting the vulnerability. The video, which has garnered over 1.3 million views, has prompted widespread unease, with many users expressing concern about the security implications.
Ottinger explained that he learned several key-decoding and replication techniques, including the use of overlays, from security expert Deviant Ollam. He noted that many of the tools required, excluding the 3D printer itself, are free and open-source, making them accessible to anyone. While Ottinger used a 3D printer, he also pointed out that keys can be cut and filed by hand or with commercial key cutters. For an experienced individual, the entire process from image acquisition to a usable key can take as little as 10 to 15 minutes.
As an ethical hacker, Ottinger's job involves simulating real-world attacks to test organizational defenses, which can include covert operations to gain physical access to buildings. He emphasized that replicating a key is particularly dangerous for homeowners because, unlike methods like lock-picking, it leaves no forensic evidence and appears as a normal entry to observers. This covert nature, he stated, is a significant security concern for defenders.
To mitigate this risk, Ottinger advises against publicly displaying keys on social media. He also recommends that homeowners enhance their security with cameras and alarm systems.