There is noting more cyberpunk than that.
“Once they have a key-insertion audio file, SpiKey’s inference software gets to work filtering the signal to reveal the strong, metallic clicks as key ridges hit the lock’s pins [and you can hear those filtered clicks online here]. These clicks are vital to the inference analysis: the time between them allows the SpiKey software to compute the key’s inter-ridge distances and what locksmiths call the “bitting depth” of those ridges: basically, how deeply they cut into the key shaft, or where they plateau out. If a key is inserted at a nonconstant speed, the analysis can be ruined, but the software can compensate for small speed variations.”
Source: https://cacm.acm.org/news/246744-picking-locks-with-audio-technology/fulltext
via: Schneier on Security blog
On second thought, definetively in about half an hour I will find something cyberpunkier than that.
