Abstract In the manuscript, we propose a novel quantum broadcasting multiparty blind signature scheme via quantum controlled teleportation. The four-particle cluster states play a role of the quantum channel in our scheme. An improved model of quantum one-time pads for encryption is introduced in the protocol, which ensures the quantum message is not to be tampered with. The security of our scheme is analyzed from the four aspects of blindness, traceability, undeniability and unforgeability.
Abstract In the manuscript, we propose a novel quantum broadcasting multiparty blind signature scheme via quantum controlled teleportation. The four-particle cluster states play a role of the quantum channel in our scheme. An improved model of quantum one-time pads for encryption is introduced in the protocol, which ensures the quantum message is not to be tampered with. The security of our scheme is analyzed from the four aspects of blindness, traceability, undeniability and unforgeability.
Abstract In this paper, a multi-proxy blind signature scheme based on controlled quantum teleportation is proposed. Entangled four-qubit Cluster state functions as quantum channel, which needs less resource to complete the quantum multi-proxy blind signature. The scheme uses the physical characteristics of quantum mechanics to guarantee its blindness, unforgeability, and undeniability. The eavesdropping check is used to ensure the security. Our scheme has a foreseeable application to the E-business, E-governments, and etc.
Quantum digital signature, as an extension of classical digital signature, has become an important research content in quantum cryptography. Quantum blind signature combines the advantages of classical blind signature and quantum signature, which can ensure the unconditional security of the scheme based on the realization of the blinded signature of the message, and can be effectively applied in many real-world scenarios. This paper uses the four-particle [Formula: see text] state as a communication channel, combined with quantum teleportation technology to propose a new quantum multi-party blind signature protocol, which has the following characteristics: First, the Toeplitz hash function based on the linear shift register is introduced to blind the message, and the length of the blinded message can be adjusted according to the actual demand to increase the flexibility of the scheme; Second, through multi-party participation, the blind signature of multi-bit messages can be realized, and the signature efficiency can be improved. Compared with other quantum blind signatures, the signature efficiency has been greatly improved; Finally, using the four-particle [Formula: see text] state as a quantum channel can make the scheme use fewer resources to transmit data and increases the security of the scheme. Through security analysis, it can be seen that the scheme has blindness, nonrepudiation and unforgeability.
Recently, a broadcasting multiple blind signature scheme based on quantum teleportation has been proposed for the first time. It is claimed to have unconditional security and properties of quantum multiple signature and quantum blind signature. In this paper, we analyze the security of the protocol and show that the signatory Ui can learn the signed message m by a single particle measurement and the signed message m can be modified at random by anyone according to the scheme. Furthermore, there are some participant attacks and external attacks existing in the scheme. Finally we present an improved protocol and show that the improved scheme can resist all of the mentioned attacks. Meanwhile, the secret keys can be used again and again, which will make it more efficient and practical.
In this paper, we introduce the cluster states into the weak blind quantum signature mechanism and put forward a weak blind quantum signature protocol with the four-particle entangled cluster states. The proposed protocol generates four relatively bases to be served as the measurement bases for two- qubit. The employment of QKD protocol and one-time pad encryption algorithm ensure the unconditional security of the protocol. Moreover, we hereinafter prove the security of the protocol against some individual eavesdropping attacks, and we show that our protocol has the characteristics of unforgeability, undeniability, blindness and traceability.
With the advancement of quantum cryptography, proxy blind signature technology combines the message concealment of blind signatures with the delegation of authority inherent in proxy signatures, thereby simultaneously ensuring message privacy and the controlled delegation of signing authority, and playing a critical role in numerous fields. This paper proposes a quantum proxy blind signature protocol based on quantum teleportation. This protocol has the following features: First, by simplifying the keys and the encryption process and using a pseudorandom number generator and quantum state permutations to perform encryption, we avoid complex unitary transformations, thereby significantly lowering the technical barrier. Second, by employing high-capacity quantum encoding — where a two-particle quantum state encodes three classical bits — the information capacity of a single communication session is significantly increased. Finally, we propose the “local operation, global signature” paradigm, in which the surrogate need only manipulate a single entangled particle to achieve a global signature through nonlocality, while the verifier recovers the message via a joint measurement. This approach conserves quantum resources and simplifies the verification process. The security analysis demonstrates that the proposed protocol can ensure blindness, satisfy the requirements of unforgeability and undeniability, and effectively resistance to interception-retransmission attacks.
A quantum proxy multi-signature scheme is presented based on controlled teleportation.We choose four-particle-cluster state as the quantum channel,use the physical characteristics of controlled quantum teleportation to implement delegation,signature and verification,and adopt quantum key distribution and one-time pad in our scheme.Different from the classical proxy multi-signature schemes based on computing complexity,its security is not influenced by the computational resource of attackers,that is,it has unconditional security.