"Frequency Hopping" Transmitter (MIT Invention) could secure, among other products, "medical devices, such as insulin pumps and pacemakers, that could be attacked if a hacker wants to harm someone."

Traditional frequency hopping breaks data down into large packets, but the process is just slow enough for adept hackers to still attack them. However, the new transmitter hops each individual "1" or "0" bit to a unique, random frequency every microsecond. Attackers simply cannot keep up with such a frenetic pace, the release explains.

The transmitter works by leveraging bulk acoustic wave (BAW) resonators, which can quickly shift between RF channel frequencies. Although BAW resonators typically only span four-to-five hegahertz of frequency channels, the researchers were able to divide their resonator's frequencies into about 80 channels, thereby making the technology viable.


https://www.scmagazine.com/mit-researchers-develop-frequency-hopping-transmitter-that-fends-off-attackers/article/772638/