Blink: Breaking Lattice-Based Schemes Implemented in Parallel with Chosen-Ciphertext Attack

ePrint Report: Blink: Breaking Lattice-Based Schemes Implemented in Parallel with Chosen-Ciphertext Attack

Jian Wang, Weiqiong Cao, Hua Chen, Haoyuan Li

As the message recovery-based attack poses a serious threat to lattice-based schemes, we conducted a study on the side-channel secu- rity of parallel implementations of lattice-based key encapsulation mech- anisms. Initially, we developed a power model to describe the power leakage during message encoding. Utilizing this power model, we pro- pose a multi-ciphertext message recovery attack, which can retrieve the …

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