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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.
27 lines
837 B
TeX
27 lines
837 B
TeX
\section{Encryption and Decryption}
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\subsection{Boolean Encryption}
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Single-bit encryption produces an LWE ciphertext:
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\begin{lstlisting}[language=Go]
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ct, err := enc.EncryptBit(true)
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bit, err := dec.DecryptBit(ct)
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// bit == true
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\end{lstlisting}
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\subsection{Integer Encryption}
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Integers are decomposed into radix blocks, each block being a \texttt{ShortInt} (1--4 bits) encrypted in a single LWE ciphertext:
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\begin{lstlisting}[language=Go]
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intEnc := fhe.NewIntegerEncryptor(params, sk)
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ct, err := intEnc.EncryptUint32(42)
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val, err := intEnc.DecryptUint32(ct)
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// val == 42
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\end{lstlisting}
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The \texttt{RadixCiphertext} type carries metadata about its FHE type (\texttt{FheUint8}, \texttt{FheUint16}, \texttt{FheUint32}, \texttt{FheUint64}, \texttt{FheUint128}, \texttt{FheUint256}) and enforces type matching at the API boundary.
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