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zeekay
abf99d05fc
Restructured from flat .tex/.pdf files into per-paper subdirectories. Added Antje Worring as co-author on all papers. Synced PDFs to pdfs/ for download site.
38 lines
1000 B
TeX
38 lines
1000 B
TeX
\section{Fully Homomorphic Encryption (FHE)}
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\subsection{FHE Integration}
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For Tier 2 contracts, Z-Chain uses \textbf{TFHE (Threshold FHE)}:
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\begin{itemize}[leftmargin=1.1em]
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\item \textbf{Encryption}: User encrypts inputs under FHE public key
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\item \textbf{Computation}: Smart contract operates on ciphertexts
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\item \textbf{Decryption}: Threshold decryption by validator committee
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\end{itemize}
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\subsection{Supported Operations}
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\begin{table}[h]
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\centering
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\begin{tabular}{lrr}
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\toprule
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Operation & Gas Cost & Latency \\
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\midrule
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Addition & 50k & 0.1ms \\
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Multiplication & 250k & 2ms \\
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Comparison ($<, >$) & 180k & 1.5ms \\
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AND/OR/XOR & 40k & 0.08ms \\
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\bottomrule
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\end{tabular}
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\caption{FHE operation costs and performance}
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\end{table}
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\textbf{Example Use Cases}:
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\begin{itemize}[leftmargin=1.1em]
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\item Encrypted auctions (bids hidden until reveal)
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\item Private voting (encrypted vote tallying)
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\item Confidential credit scores (encrypted FICO-like computation)
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\end{itemize}
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