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Apr
14
comment How to recover $e$ from $f_A(e) = Ae \mod q$ when knowing trapdoor
Thank @ChrisPeikert, I am going to use $f_A(e)$ like a encryption function. I want to hide e under $f_A(.)$ and $u = f_A(e) \mod q$ is a cipher-text. When I want to invert $e$, I will use $B$ and $A$ to recover $e$. Is it possible?