The zip file required a password. Unusual for a firmware patch. She tried standard defaults: admin123, password, delhi2026 . Nothing. Then, on a whim, she typed —the filename itself. The archive unzipped.

Riya Khanna, a junior data analyst at the National Smart Infrastructure Monitoring Centre, only opened it because the archive’s internal hash didn’t match the original manifest. She worked the night shift alone, the hum of cooling fans her only company.

Inside were three items: a plain-text log, a single JPEG, and a Python script named relay_decrypt.py .