<p>This paper proposes an electronic cash system using quantum teleportation and quantum proxy blind signatures. The system uses a three-qubit entangled state as the quantum channel to enable authorization, signing, and verification of electronic cash. The bank generates electronic cash by blinding transaction information, while merchants can independently verify its validity. To ensure unconditional security, the system incorporates quantum key distribution and quantum one-time pad (QOTP) techniques. By introducing quantum proxy blind signatures, this paper further analyzes the security of the system and demonstrates that it successfully satisfies key security requirements for electronic cash, including unforgeability, undeniability, blindness, and prevention of double spending. Furthermore, dynamic quantum circuits via classical feedforward and control flow are designed and implemented on IBM’s quantum experimental platform to achieve target quantum state transmission based on three-qubit entanglement.</p>