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36 lines
1.2 KiB
TeX
36 lines
1.2 KiB
TeX
\section{Parameter Selection}
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\label{sec:params}
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\begin{table}[h]
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\centering
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\begin{tabular}{@{}lll@{}}
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\toprule
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\textbf{Parameter} & \textbf{Symbol} & \textbf{Value} \\
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\midrule
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LWE dimension & $n$ & 1024 (PN10QP27) \\
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LWE modulus & $q$ & $2^{27} \approx 134\text{M}$ \\
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Blind rotation dimension & $N$ & 1024 \\
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Blind rotation modulus & $Q$ & $2^{27}$ (same ring) \\
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Key decomposition base & $B_g$ & $2^7 = 128$ \\
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Noise std dev & $\sigma$ & 3.2 \\
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Smudging noise & $\sigma_{\text{smudge}}$ & $2^{10}$ \\
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\bottomrule
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\end{tabular}
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\caption{TFHE parameter set (PN10QP27)}
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\label{tab:tfhe-params}
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\end{table}
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\begin{proposition}[Security Level]
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\label{prop:security}
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The PN10QP27 parameter set provides $\geq 128$-bit classical security and $\geq 100$-bit
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quantum security, matching the security of the standard TFHE parameter set.
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The LWE instance has dimension $n = 1024$ and noise ratio $\alpha = \sigma\sqrt{2\pi}/q \approx 2^{-23.4}$,
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for which the best known attacks (primal and dual lattice attacks) require $\geq 2^{128}$
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classical operations.
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\end{proposition}
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%% -----------------------------------------------------------------------
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%% 6. FHE VM INTEGRATION
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%% -----------------------------------------------------------------------
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