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<p>Current quantum visual secret sharing (QVSS) schemes are mainly limited to encrypting black-and-white binary images, which is one of their major key problems. To solve this problem, we propose a new quantum visual multi-tone secret sharing (QVMTSS) scheme. In the sharing phase, we first encrypt the whole quantum image using a novel enhanced quantum representation (NEQR). This avoids individual pixel processing while achieving the encryption of the four-tone image. Subsequently, we encode the binary color values to drastically reduce qubit usage during the sharing phase and achieve the encryption of a <InlineEquation ID="IEq1"> <InlineMediaObject> <ImageObject Color="BlackWhite" FileRef="11760_2025_4159_Article_IEq1.gif" Format="GIF" Height="16" Rendition="HTML" Resolution="72" Type="Linedraw" Width="16" /> </InlineMediaObject> <EquationSource Format="TEX">\(2^t\)</EquationSource> <EquationSource Format="MATHML"><math> <msup> <mn>2</mn> <mi>t</mi> </msup> </math></EquationSource> </InlineEquation>-tone image. In the recovery phase, the secret image is recovered by performing quantum XOR operations based on position. Theoretical analysis and experimental findings confirm the scheme’s security and feasibility.</p>

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Quantum visual multi-tone secret sharing scheme based on color encoding

  • 期刊论文

  • 发表日期：

    2025年5月8日

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  • Meng-Yao Liu,
  • Pei-Jun Zhao,
  • Bin Yan,
  • Jeng-Shyang Pan,
  • Hong-Mei Yang

摘要

Current quantum visual secret sharing (QVSS) schemes are mainly limited to encrypting black-and-white binary images, which is one of their major key problems. To solve this problem, we propose a new quantum visual multi-tone secret sharing (QVMTSS) scheme. In the sharing phase, we first encrypt the whole quantum image using a novel enhanced quantum representation (NEQR). This avoids individual pixel processing while achieving the encryption of the four-tone image. Subsequently, we encode the binary color values to drastically reduce qubit usage during the sharing phase and achieve the encryption of a \(2^t\) 2 t -tone image. In the recovery phase, the secret image is recovered by performing quantum XOR operations based on position. Theoretical analysis and experimental findings confirm the scheme’s security and feasibility.