31 results about "Quantum signature" patented technology

The invention discloses an arbitration quantum signature method based on quantum wandering stealth transmission, which comprisesan initialization phase for preparing a key and setting a system, a signature phase for constructing a signature of a transmission message, and a verification phase for verifying the validity of the signature, authenticity of the message source, and integrity of the message.The method of the invention adopts the stealth teleportation based on the quantum wandering to transmit the d-dimensional quantum state, and the entanglement source used for the stealth transmission does not need to be prepared in advance, thus saving the overhead of preparing the entangled state specially; Moreover, it is more efficient to measure with two projections of d elements. At the same time, the introduction of random parameters prevents the verifier from obtaining the content of the transmitted information and denying the signer's signature before accepting the signed information. In addition, the public board is used to publish the random parameters, and the verifier can obtain the information content of the signature after the verification is completed. Finally, the methodof the invention has the characteristics of saving resources, high measuring efficiency, easy realization of the laboratory and high signature security.

The invention discloses an arbitration quantum signature design method based on Grover iteration flexible tracking, and the method employs a Grover search algorithm to achieve the purpose that an arbitration management party can find a signer of a problem signature when a signature dispute occurs. In the arbitration process, the arbitration management system and each signature participant negotiate to obtain a final secret key and find a signer with a problem signature, so that a direct'disclosure 'mechanism of an arbitration group signature is avoided. The method is characterized in that a complete arbitration signature verification system is established, an arbitration management system can select whether to disclose the identity of a problem signature signer, and the method has flexible traceability and fairness.

The invention discloses an identity-based post-quantum encryption and decryption method, system, equipment and medium, which belong to the field of cryptography. The method includes: the key generation center uses the identity-based post-quantum private key generation algorithm to generate the sender's private key and Receiver's private key; the sender uses the identity-based post-quantum signature algorithm to sign the plaintext of the message with the sender's private key, concatenates, compresses and encrypts the signed data and the plaintext of the message in sequence, and uses the receiver's ID to encrypt the session key. Identity-based post-quantum encryption, and send the encrypted data and encrypted session key to the receiver; the receiver uses the receiver's private key to perform identity-based post-quantum decryption on the encrypted session key, symmetrically decrypt the encrypted data, and decrypt the decrypted The data is decompressed and separated to obtain the message plaintext and signature data, and the identity-based post-quantum verification is performed using the sender ID. Improve message encryption security.

Techniques of generating a lattice-based verification matrix and signature vector are disclosed. The method enables a generating device to sample a gadget matrix and then generate a reduced gadget matrix. The generating device may then sample a trapdoor matrix and use the trapdoor matrix and the reduced gadget matrix to generate a verification matrix. A sending device may receive the trapdoor matrix and the verification matrix from the generating device, in addition to receiving a message. The sending device may then use the trapdoor matrix and the verification matrix to generate a signature vector for the message. A verification device can receive the verification matrix, the message, and the signature vector. The verification device may use the verification matrix and the signature vector to verify the message.

A quantum bill transfer settlement method based on a smart contract comprises the following steps: authenticating the identity of a quantum bill, registering the bill in a quantum bill smart contract transfer system when transfer or a transferee needs to transfer the bill, so that after the identity and legality are registered and verified, the transfer or transferee can transfer various quantum bills in the quantum bill intelligent contract transfer system; the transferring the quantum bill, concretely selecting a proper transfer mode for payment by the transfer or the transferee according to the characteristics of the quantum bill, taking the transfer as a bill debtor, performing quantum signature on the bill according to an intelligent contract, and transferring the quantum bill to the transferee after the signature succeeds; and implementing distributed bookkeeping of the quantum bill, wherein the quantum bill intelligent contract transfer system records of transfer and accepting records which comprise corresponding intelligent contract protocols, quantum bill transfer timestamps, block chain hash values and transferor and transferee information, so that the security of quantum bill transfer can be guaranteed.

The invention discloses a public key arbitration quantum signature protocol based on quantum block encryption, which belongs to the technical field of quantum security communication, including quantum key sharing among signers, receivers and arbitrations through quantum key distribution; signers Prepare two quantum messages and a quantum signature, send a quantum message to the receiver, and send the quantum signature to the arbitration; the receiver performs quantum signature verification under the constraints provided by the arbitration. The protocol provided by the invention can not only guarantee safety, but also has better practical application value.

The invention discloses an arbitration quantum signature method based on quantum wandering stealth transmission, which comprisesan initialization phase for preparing a key and setting a system, a signature phase for constructing a signature of a transmission message, and a verification phase for verifying the validity of the signature, authenticity of the message source, and integrity of the message.The method of the invention adopts the stealth teleportation based on the quantum wandering to transmit the d-dimensional quantum state, and the entanglement source used for the stealth transmission does not need to be prepared in advance, thus saving the overhead of preparing the entangled state specially; Moreover, it is more efficient to measure with two projections of d elements. At the same time, the introduction of random parameters prevents the verifier from obtaining the content of the transmitted information and denying the signer's signature before accepting the signed information. In addition, the public board is used to publish the random parameters, and the verifier can obtain the information content of the signature after the verification is completed. Finally, the methodof the invention has the characteristics of saving resources, high measuring efficiency, easy realization of the laboratory and high signature security.

The invention discloses a quantum signature method based on secret sharing, which comprises three steps of initialization, signature generation and signature verification, and in the whole process, distribution of secret keys and partial verification and arrangement of signatures are carried out according to a reliable third party. Compared with other quantum signature schemes, the key distribution and encryption of the method do not involve complex encryption methods or complex quantum operations, and the method is more practical and higher in efficiency on the basis of meeting security, unforgeability and non-repudiation.

The invention discloses an arbitration quantum signature method based on Bose sampling random unitary operation, including an initialization stage, a signature stage and a verification stage; the initialization stage is used to prepare a key and establish a communication system; the signature stage is used to select a suitable signature The algorithm designs the signature of the transmitted information; the verification phase is used to verify the validity of the signer and the integrity and authenticity of the original information. The present invention adopts the unitary operation encryption based on Bose sampling in the signature of the transmission information in the arbitration quantum signature, adopts the quantum walk teleportation based on the graph to transfer the m-mode quantum state, and the necessary entanglement state for teleportation does not need Prepared in advance, the employment of public channels and random tuples makes the security higher, and the teleportation model using the Bose sampling model and the quantum walk has been proven to be realized through a linear optical network; therefore, the method of the present invention has high security and saves resource and easy to implement experimentally.

The invention discloses an arbitration quantum signature design method based on Grover iterative and flexible tracking. The design uses a Grover search algorithm to realize that when a signature dispute occurs, the arbitration management party can find the signer of the problematic signature. During the arbitration process, the arbitration management system negotiates with each signature participant to obtain the final key, find the signer of the problem signature, and avoid the direct "public" mechanism of the arbitration group signature. The present invention is characterized in that a complete arbitration signature verification system is established, and the arbitration management system can choose whether to disclose the identity of the signature signer of the problem, which has flexible traceability and fairness.

The invention discloses a quantum computing-resistant signing method based on a public key pool, and a signing system, wherein the signing method includes: the signing direction seal server requests to obtain an encrypted seal public key; The party uses the electronic seal to sign the document to generate a document with the electronic signature; the electronic signature includes at least the seal signature generated by the public key of the seal, and the anti-quantum signature containing the encrypted public key of the seal Calculate the public key; when verifying the seal, the seal verification direction seal server requests to obtain the public key key for the seal public key extracted from the anti-quantum computing public key, and uses the extracted seal public key to verify the seal signature.

The invention provides a quantum digital signature method independent of a reference system, which is applied to a quantum signature system. The quantum digital signature system comprises three participants of a user side Alice, a Bob and a Charlie, the Alice belongs to a signer, and the Bob and the Charlie belong to signed persons. The method comprises a key distribution stage and a message stage, in the key distribution stage, a key is generated by using a reference system independent quantum key distribution protocol, and then in the message stage, the quantum digital signature is completed by using the key generated in the above process. According to the protocol, a relatively high signature rate can still be kept under the condition that a relatively large deflection angle exists between user reference frames, and the performance of the protocol is superior to that of an existing BB84 quantum digital signature protocol.

This application relates to the field of key generation technology, and provides a hardware acceleration architecture and method for key generation based on post-hashed quantum signatures. The hardware acceleration architecture for key generation is based on the characteristics of algorithms and parameter sets in the LMS key generation process. A high-speed and scalable hardware-accelerated architecture is designed. The architecture is designed to be applicable to all parameter sets of the LMS solution, and through moderate parallel design, low latency and high hardware utilization can be achieved at the same time. At the same time, the architecture maintains a certain constant power when different parameters are implemented, which can be To a certain extent, it helps defend against power attacks.

The invention discloses a block chain digital signature method, device and system based on quantum cryptography, which is applied to the entrusting party in the block chain, and the entrusting party is generated based on an election mechanism. The method includes: the receiver and the entrusting party receive Quantum signature and signature information; if the recipient passes the quantum signature verification, receive the quantum entrustment sent by the recipient; the entrusting party verifies the signature information based on the quantum entrustment; if the verification is passed, receive the private key pair sent by the recipient , verify the quantum signature based on the private key pair. In the above process, the quantum signature, quantum entrustment and private key pair are constructed based on the quantum key technology, and the entrusting party is selected based on the election mechanism, and the entrusting party uses the quantum key technology to verify the quantum signature. The party can fully guarantee its impartiality in message verification. Due to the high security of the quantum key, the security can be guaranteed without complex keys, and the efficiency of the signature is improved.