New tech can see a CPU's transistors in action — terahertz radiation can potentially steal data as a chip is running

Researchers at Adelaide University have developed a method using terahertz radiation to detect a chip's transistor activity while it is running, providing new insights into processor diagnostics. The process involves using a vector network analyzer to convert microwave signals into terahertz waves, allowing for the observation of transistor behavior. However, there are challenges to overcome, such as accurately testing complex, densely packed chips and the potential security risk of data theft as attackers could exploit this technology. Despite these issues, this advancement opens up new possibilities for processor testing and analysis.