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Keyless Entry: Breaking and Entering eMMC RPMB with EMFI

2025/11/27 by Fukami, Aya, Buurke, Richard
Computer Science · #Cryptographic Implementations and Security #Cryptography and Security (cs.CR) #FOS: Computer and information sciences #Physical Unclonable Functions (PUFs) and Hardware Security #Security and Verification in Computing

paper · doi:10.48550/arxiv.2511.22340

openalex publication_date 2025/11/27 · openalex created_date 2025/12/03 · openalex updated_date 2026/07/28

Abstract

The Replay Protected Memory Block (RPMB) in modern storage systems provides a secure area where data integrity is ensured by authentication. This block is used in digital devices to store pivotal information that must be safeguarded against modification by potential attackers. This paper targets the authentication scheme of the RPMB in three different eMMCs from a major manufacturer. A glitch was injected by sending an electromagnetic pulse to the target chip. RPMB authentication was successfully glitched and the information stored in two target eMMCs was overwritten with arbitrary data, without affecting the integrity of other data.

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