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Files from Stefan Marsiske

First Active2020-10-05
Last Active2020-10-05
GAEN Protocol Metadata Deanonymization / Risk-Score Inflation
Posted Oct 5, 2020
Authored by Stefan Marsiske

The TX Power value in the metadata in the beacon of the GAEN protocol used by the corona/contact tracing app allows for attackers to influence risk-score calculations in their favor and the same metadata can also be used to deanonymize diagnosed users based on the type of phone they are using.

tags | advisory, protocol
advisories | CVE-2020-24722
SHA-256 | 327419dece0900ea7e5541c080133f27f84f526d86f6c2191e14654349a7f444
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