Electromagnetic side-channel attacks recover ECDSA secrets from OpenSSL on post-2019 SoCs including Snapdragon 750G and Broadcom BCM2711, showing that libgcrypt countermeasures do not fully mitigate the Nonce@Once attack.
SoK: SCA-secure ECC in Software - Mission Impossible?
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Breaking ECDSA with Electromagnetic Side-Channel Attacks: Challenges and Practicality on Modern Smartphones
Electromagnetic side-channel attacks recover ECDSA secrets from OpenSSL on post-2019 SoCs including Snapdragon 750G and Broadcom BCM2711, showing that libgcrypt countermeasures do not fully mitigate the Nonce@Once attack.