where unclean hands are the most common factor contributing to this cause. Clean- Hands [15] is a recently proposed system that uses a combination of BLE beacon tags and HCP’s mobile phones for detecting occurrences of noncompliance with hand hygiene. This appli- cation requires different levels of time accuracy. For instance, a few milliseconds may be sufficient to disambiguate the handwashing event of HCPs, but a significantly higher accuracy level of a few microseconds would be required to secure the same system against possible gaming