Collisions of uniformly distributed identifiers with an application to MAC address anonymization
2020
The main contribution of this paper consists in theoretical approximations of the collision rate of $n$ random identifiers uniformly distributed in $m (> n)$ buckets---along with bounds on the approximation errors. A secondary contribution is a decentralized anonymization system of media access control (MAC) addresses with a low collision rate. The main contribution supports the secondary one in that it quantifies its collision rate, thereby allowing designers to minimize $m$ while attaining specific collision rates. Recent works in crowd monitoring based on WiFi probe requests, for which collected MAC addresses should be anonymized, have inspired this research.
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