In this paper, we propose a multi-group e-commerce signature scheme based on quantum teleportation and Bell states. Compared with the recent quantum group signature scheme, what our scheme has optimised is the traditional signature model with only one group manager and the utilisation of quantum resources. By setting up different group managers in different groups, the scheme promotes the traditional signature model into a more practical situation and can be easily used in e-payment system. In addition, the quantum teleportation and Pauli operations based on the Bell states are used in the transaction process, and these techniques can also be easily implemented under practical situations. Finally, the security analysis shows that the scheme can defend against different attacks from internal and external sources, including intercepting resend attacks and entanglement attacks. It also proves that the scheme is reliable, safe and effective facing with denial and forgery.
In this paper, we propose a multi-group e-commerce signature scheme based on quantum teleportation and Bell states. Compared with the recent quantum group signature scheme, what our scheme has optimised is the traditional signature model with only one group manager and the utilisation of quantum resources. By setting up different group managers in different groups, the scheme promotes the traditional signature model into a more practical situation and can be easily used in e-payment system. In addition, the quantum teleportation and Pauli operations based on the Bell states are used in the transaction process, and these techniques can also be easily implemented under practical situations. Finally, the security analysis shows that the scheme can defend against different attacks from internal and external sources, including intercepting resend attacks and entanglement attacks. It also proves that the scheme is reliable, safe and effective facing with denial and forgery.
In this paper, we propose a new secure quantum group signature with Bell states, which may have applications in e-payment system, e-government, e-business, etc. Compared with the recent quantum group signature protocols, our scheme is focused on the most general situation in practice, i.e. only the arbitrator is trusted and no intermediate information needs to be stored in the signing phase to ensure the security. Furthermore, our scheme has achieved all the characteristics of group signature—anonymity, verifiability, traceability, unforgetability and undeniability, by using some current developed quantum and classical technologies. Finally, a feasible security analysis model for quantum group signature is presented.
In this paper, we present a group signature scheme using quantum teleportation. Different from classical group signature and current quantum signature schemes, which could only deliver either group signature or unconditional security, our scheme guarantees both by adopting quantum key preparation, quantum encryption algorithm and quantum teleportation. Security analysis proved that our scheme has the characteristics of group signature, non-counterfeit, non-disavowal, blindness and traceability. Our quantum group signature scheme has a foreseeable application in the e-payment system, e-government, e-business, etc.
In this paper, a group signature scheme based on quantum walk for quantum messages is proposed. Our scheme uses long step quantum walk-based teleportation and modified quantum one-time pad to authenticate the quantum messages respectively. In our scheme, the signer in a group signs the quantum messages by quantum walk-based teleportation and modified quantum one-time pad. The verifier can verify the signature via quantum walk-based teleportation while the group manager verifies the signature and identifies the signer via modified quantum one-time pad. The security analysis shows that the scheme can reach the properties of group signature. Compared to the teleportation via EPR pairs or Bell-like states, quantum walks are more flexible and use less measurement resources. Quantum teleportation via long-step quantum walk is more secure than that via one-step quantum walk in previous related works. The scheme can apply to arbitrary finite dimensional quantum systems and can also be possible to realize in practice.
With the in-depth development of the digital economy and the escalating demands for transaction security and quantum attack resistance in electronic payment scenarios, quantum signature is gradually emerging as a core research direction in the construction of electronic payment security systems. Addressing the requirements for anonymity and security in electronic payment scenarios, this paper proposes an electronic payment scheme based on controlled quantum teleportation. During the implementation of the scheme, the quantum entanglement characteristics of the four-particle entangled state, the core logic of controlled quantum teleportation, the privacy protection features of proxy blind signature technology, and the technical advantages of superdense coding are integrated to provide security guarantees for the payment process. Meanwhile, the proposed scheme builds a payment system relying on quantum key distribution protocols, forming a payment system with information-theoretic security attributes. This effectively overcomes the limitation that traditional UnionPay payment systems rely on computational complexity at the security level. In addition, the scheme satisfies nonrepudiation and unforgeability and possesses the capability to resist interception-resending attacks.
The quantum group signature is a variant of the arbitrated quantum signature with special properties. Most existing teleportation-based quantum group signature schemes do not possess threshold properties, and extending them to quantum threshold group signatures is difficult. Therefore, to realize the extension from ordinary quantum signature to quantum (t, n) threshold group signature and solve the problem of low efficiency of quantum signature based on joint Bell state measurement, this paper proposes a quantum (t, n) threshold group signature scheme based on generalized teleportation implemented by multi-coin quantum walk. In the proposed scheme, n signers form a group, and only t signers can generate a valid signature on behalf of the group using the quantum walking system. In addition, a verifier checks the validity of the signature through the quantum one-time pad and quantum comparison algorithm using a trusted arbiter. The security analysis shows that the proposed scheme meets the requirements of unforgeability, nonrepudiation, threshold security, signer identity traceability, and signer anonymity. In terms of efficiency, the proposed scheme uses teleportation based on multi-coin quantum walk to transmit the quantum message without the need to prepare entangled quantum states in advance. It then replaces the joint Bell measurement of quantum teleportation with a more efficient projection measurement. Moreover, the proposed scheme uses random numbers and public boards, which can avoid the repudiation of signatures and guarantee their integrity.
Abstract With the upgrading of communication technology and the rapid development of quantum computing, the classical digital signature schemes are faced with unprecedented challenges, so the research on quantum digital signature is imperative. In this paper, we propose a multi-proxy signature scheme based on controlled quantum teleportation of five-qubit entangled state. In this scheme, quantum fourier transform is used as an encryption method to encrypt message, which improves the quantum efficiency compared with the quantum one-time pad. The five-qubit maximally entangled state which is qubit threshold quantum error correction required is used as the quantum channel to ensure the stability of the scheme. Security analysis shows that our scheme is unforgeable and undeniable, and it can resist the intercept-resend attack.