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<p>Blind signatures play a crucial and extensive role in security protocols where the anonymity of participants is paramount. Here, we propose an efficient quantum blind signature (QBS) protocol combining quantum key distribution (QKD), onetime pad (OTP), and onetime cryptographic cyclic redundancy codes hashing (OT-CRC-H), achieving information-theoretically secure blind signatures for arbitrary length documents. We simulated the performance of our protocol separately in a quantum network constructed using discrete-variable (DV) and continuous-variable (CV) QKD. Simulations demonstrate that in gigahertz systems within a 200-km range for signing one-megabit documents, QBS with DV QKD achieves a signature rate exceeding 588 times per second (tps), while QBS with CV QKD reaches 183 tps. In the sending-or-not-sending twin-field quantum network, QBS achieves a signature efficiency three times higher than a multi-bit quantum digital signature (QDS) and <InlineEquation ID="IEq1"> <EquationSource Format="TEX">\(10^{9}\)</EquationSource> <EquationSource Format="MATHML"><math> <msup> <mn>10</mn> <mn>9</mn> </msup> </math></EquationSource> </InlineEquation> times faster than a single-bit QDS. Notably, the protocol maintains compatibility with various QKD implementations and represents the first protocol for quantum blind signatures based on QKD. Our work establishes a new solution for practical quantum-enhanced signature implementations in quantum networks.</p>

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Efficient quantum blind signature for quantum networks

  • 期刊论文

  • 发表日期：

    2026年1月13日

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  • Qian Niu,
  • Yu Wang,
  • Jian Li,
  • Qi Su

摘要

Blind signatures play a crucial and extensive role in security protocols where the anonymity of participants is paramount. Here, we propose an efficient quantum blind signature (QBS) protocol combining quantum key distribution (QKD), onetime pad (OTP), and onetime cryptographic cyclic redundancy codes hashing (OT-CRC-H), achieving information-theoretically secure blind signatures for arbitrary length documents. We simulated the performance of our protocol separately in a quantum network constructed using discrete-variable (DV) and continuous-variable (CV) QKD. Simulations demonstrate that in gigahertz systems within a 200-km range for signing one-megabit documents, QBS with DV QKD achieves a signature rate exceeding 588 times per second (tps), while QBS with CV QKD reaches 183 tps. In the sending-or-not-sending twin-field quantum network, QBS achieves a signature efficiency three times higher than a multi-bit quantum digital signature (QDS) and \(10^{9}\) 10 9 times faster than a single-bit QDS. Notably, the protocol maintains compatibility with various QKD implementations and represents the first protocol for quantum blind signatures based on QKD. Our work establishes a new solution for practical quantum-enhanced signature implementations in quantum networks.