116 results about "Quantum codes" patented technology

The embodiment of the invention provides a multi-dimensional quantum data compressing and uncompressing method and apparatus. The multi-dimensional quantum data compressing method includes obtaining input source data to generate binary coded data of the source data; performing multi-dimensional run-length encoding on the binary encoded data and decomposing source data codes into program codes and quantum codes; building a quantum coding dictionary respectively for the program codes and the quantum codes; performing binary encoded data quantization coding on the program codes and the quantum codes according to the built quantum coding dictionaries, sequentially replacing data quantum with data quantum coding, and obtaining quantum codes of the program codes and the quantum codes respectively; compressing the quantum codes of the program codes and the quantum codes respectively to obtain compressed data; coding compression parameters into a compressed data header; combining the compressed data header with the compressed data to form ultimate compressed output data. The multi-dimensional quantum data compressing and uncompressing method is applicable to data of all types.

An apparatus and method for implementing a secure quantum cryptography system using two non-orthogonal states. For each qubit, the to emitter station prepares a quantum system in one of two non-orthogonal quantum states in the time-basis to code bit values. Intra- and inter-qubit interference is then used to reveal eavesdropping attempts. Witness states are used to help reveal attacks performed across the quantum system separation.

The invention discloses a vehicle and road cloud remote control system and method based on quantum encryption. The control system comprises a cloud service platform, a quantum password service platform, a quantum password generation network and a vehicle-mounted terminal. The cloud service platform comprises a service platform end quantum encryption and decryption module, an information display module and a cloud control module, and the quantum secret service platform comprises a quantum key pool, a quantum key distribution service module and a key management service module. The vehicle-mounted terminal comprises a vehicle end quantum encryption and decryption module, a vehicle video switching module, a CAN communication module, a vehicle end signaling service module and a network monitoring module. According to the method, a traditional quantum encryption mode is creatively improved, and the communication safety performance can be greatly improved; in the remote control process, the system can be automatically switched to the road end to perform short-distance communication with the road end, and the road end directly communicates with the cloud end, so that stable interaction with the cloud end is facilitated, and safe cloud driving is realized.

In quantum cryptography communication, a sequence of signals in the form of quantum states randomly selected from a plurality of quantum states each having a different phase modulation angle is transmitted from a data transmitting apparatus. In a data receiving apparatus, if the sequence of samples is received, a plurality of bases corresponding to a plurality of different phase modulation angles are randomly selected, and a homodyne detection process is performed using the selected bases. Information indicating the bases used in the homodyne detection process is sent to the transmitting apparatus. In the data transmitting apparatus, depending on the bases used in the receiving apparatus, bit values are assigned to the plurality of different quantum states selected by the transmitting apparatus, and information indicating the assigned bit values is sent to the data receiving apparatus.

The present invention relates to a quantum coder with phase modulated polarization state, decoder and polarization compensating method used in the quantum secret communication, four-state quantum coder and decoder are formed from a phase-polarization controller and a true random generator, and the six-state quantum coder and decoder are formed from two phase-polarization controllers and a synchronous trigger, in the quantum secret communication it utilizes the quantum coder and decoder to effectively compensate the polarization state distortion resulted in the course of signal transmission, so that its error code rate can be greatly reduced to 10 to the minus fifth, and its modulation speed can be up to several GHz from tens Hz.

Systems, apparatuses, methods, and computer program products are disclosed for post-quantum cryptography (PQC). An example method includes receiving data. The example method further includes retrieving policy information associated with the data. The example method further includes generating a set of policy attributes about the data based on the data and the policy information. Subsequently, the example method includes generating a risk profile data structure based on the set of policy attributes. The risk profile data structure may be indicative of a vulnerability of the data in a PQC data environment.

In a system carrying out cryptography communication using a quantum, it is aimed to correctly verify a quantum state received at the commit phase according to the quantum bit string commitment system, even if not maintaining the quantum state until the open phase but immediately observing the quantum state. According to the present invention, the quantum cryptography communication system includes a sending device 1 and a receiving device 2 connected by a quantum communication channel 11 and a classical communication channel 12. A carrier sending unit 14 of the sending device 1 sends a quantum to the quantum communication channel 11, a carrier receiving unit 17 of the receiving device 2 receives the quantum and observes its quantum state. A receiving device controlling unit 16 computes using the observation result and data sent from a data sending unit 15 of the sending device 1 to a data receiving unit 18 of the receiving device 2 through the classical communication channel 12, and outputs the result of cryptography communication derived from the computation.

A Post-Quantum Computing Cryptographic communication protocol including a lattice based RSA algorithm, the protocol may include: generating a public key and a private key pair; encrypting a message using a public key pair; transmitting the encrypted message over a communication channel; and decrypting the encrypted message using a private key pair, wherein the generating the public key and the private key pair includes; selecting a first random vector from lattices using a Klein's Algorithm; selecting a second random vector from lattices using the Klein's Algorithm; generating a shortest random vector using a Gauss Sieve algorithm; taking a first vector product of the first random vector and the second random vector; calculating a Totient function of the first vector product; converting the Totient function to the first vector product; generating the public key pair; and generating the private key pair.

A network and a device can support secure sessions with both (i) a post-quantum cryptography (PQC) key encapsulation mechanism (KEM) and (ii) forward secrecy. The device can generate (i) an ephemeral public key (ePK.device) and private key (eSK.device) and (ii) send ePK.device with first KEM parameters to the network. The network can (i) conduct a first KEM with ePK.device to derive a first asymmetric ciphertext and first shared secret, and (ii) generate a first symmetric ciphertext for PK.server and second KEM parameters using the first shared secret. The network can send the first asymmetric ciphertext and the first symmetric ciphertext to the device. The network can receive (i) a second symmetric ciphertext comprising “double encrypted” second asymmetric ciphertext for a second KEM with SK.server, and (ii) a third symmetric ciphertext. The network can decrypt the third symmetric ciphertext using the second asymmetric ciphertext.