“The communication protocol used by some of the latest generation of Implantable Cardioverter Defibrillators (ICDs) is weak enough to allow even attackers without advanced knowledge to reverse-engineer it and exploit vulnerabilities such as denial of service (DoS), security researchers have discovered.
In a paper (PDF) titled On the (in)security of the Latest Generation Implantable Cardiac Defibrillators and How to Secure Them, a group of six researchers from Leuven, Belgium, and Birmingham, UK, explain that Implantable Medical Devices (IMDs) use proprietary protocols for communication, and that limited or no security features are employed for wireless communication.”
Source: Implantable Cardiac Defibrillators Easily Hacked: Researchers | SecurityWeek.Com