# A Quantum Proxy Signature Scheme Without Restrictions on the Identity and Number of Verifiers

## TL;DR

This paper introduces a new quantum signature method that allows anyone to verify messages without needing prior setup.

## Contribution

The novel scheme removes the need for predefined verifiers in quantum proxy signatures.

## Key findings

- The proposed scheme supports verification by arbitrary parties without pre-registration.
- It maintains information-theoretic security guarantees.
- The approach addresses limitations in existing quantum proxy signature systems.

## Abstract

Quantum digital signatures (QDS) establish a framework for information-theoretically secure authentication in quantum networks. As a specialized extension of QDS, quantum proxy signatures facilitate secure delegation of signing privileges in distributed quantum environments. However, existing schemes require the predefinition of verifier identities at the system setup phase, which fundamentally constrains their deployment in real-world scenarios. To address this constraint, we propose a quantum proxy signature scheme supporting verification by arbitrary parties without pre-registration while maintaining information-theoretic security guarantees. This work presents a constructive approach to mitigating verification constraints in quantum proxy signature architectures.