In the fluorescent-lit silence of the data forensics lab, Special Agent Lena Croft stared at the screen. The suspect, a ghost-like hacker known only as "Nyx," had left no digital fingerprints. Encrypted drives, dead drops, and a phone wiped cleaner than a surgeon’s scalpel.

The software bloomed on her screen, a waveform of green and blue spikes. For thirty minutes, it was gibberish. Then, the pattern emerged. Nyx, arrogant in his skill, had never considered the keyboard a witness. He had typed his master encryption passphrase just before wiping the system.

The ledger opened. $47 million in ransom funds, frozen.

She ran the diagnostic.

Baytion’s firmware stored a rolling buffer of the last 2,000 keystrokes, not as text, but as inter-key latency data . Even if the hard drive was encrypted or wiped, the keyboard’s own onboard memory—accessible only through Baytion’s diagnostic tool—held the rhythmic signature of every touch.