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184
results.
Updated on
15/07/2026 [08:24:00]
Results 25 to 50 of 184
Absstract of: GB2632664A
A pair of pulses, of differing phase but identical polarisation, are generated 126, 127. The pulse pair is passed through a polarisation adjuster / polarisation controller 140 and then an interferometer 160. At the input to the interferometer a PBS splits each received pulse into orthogonal polarisation components (|Vn>, |Hn>). One arm of the interferometer includes a delay element which delays one of the polarisation components sufficiently to enable interference between two pulses of the pair. The interferometer outputs an interference pulse with a polarisation state 166 which is dependent on a phase difference ϕ1 between the input pulses. Different polarisation states can be coded by setting different phase differences ϕ1 , ϕ2 between input pulse pairs. The invention may be applied to quantum key distribution (QKD). Preferably a sequence of pulses is input to the interferometer. The pulses are preferably generated by injection locking a first laser diode 121 (which controls the phase difference between consecutive pulses) to a second laser diode 123, via a circulator 125.
Absstract of: US20260180803A1
The present disclosure relates to post quantum cryptography (PQC) enhancement of authentication and key agreement (AKA) procedures for use in communication networks. Aspects of the disclosure include use of a pre-shared post quantum key (PPK), or a selected PPK from a list of PPKs, or use of a home network public key (pk) and private key (sk) derived using a post-quantum cryptography (PQC) key generation function, defining PQC-based pk and sk, for authentication procedures between user equipment and a network entity. Aspects of the disclosure further include use of the PQC-based pk and sk for key generation of shared PQC-based keys.
Absstract of: FI20246511A1
A computer-implemented method for determining a quantum circuit appliable on n quantum elements. The method comprises obtaining (102) a first permutation entity, wherein said first permutation entity is indicative of a first permutation P^_n, said first permutation P^_n comprising at least one permutation or partial permutation appliable to a sequence of digits of length n, and determining (104) a second permutation entity, wherein said second permutation entity is indicative of a quantum circuit appliable on n quantum elements, wherein the quantum circuit corresponds to the first permutation P^_n, said first permutation comprising at least one permutation or partial permutation appliable to a sequence of digits of length n, said quantum circuit corresponding to a sequence of unitary operators. The method also comprises providing (106) the second permutation entity as an output to enable implementing the first permutation by utilizing n quantum elements on a quantum computing device.
Absstract of: US20260172121A1
A quantum key distribution device includes an optical modulator for modulating an optical signal and transmitting the modulated optical signal, and a controller unit for controlling the modulation. The controller controls, at a first timing, modulation of an optical signal in accordance with a first optical modulation rule in a first correspondence relationship including plural optical modulation rules each of which defines association between a first combination of a basis type and an signal state and a second combination of a value of a second bit corresponding to the basis type and a value of a first bit corresponding to the signal state, the plural optical modulation rules being different in association, and controls modulation of an optical signal in accordance with a second optical modulation rule different from the first optical modulation rule among the plural optical modulation rules of the first correspondence relationship at a second timing.
Absstract of: US20260172385A1
Here describes a method of validating user identity on social media platforms. The method comprises receiving a set of attributes associated with a user; securing the set of attributes via the quantum-secure link connected to a quantum cloud service; storing a timestamp of the set of attributes as a record on a quantum cloud via the quantum link; providing a first verification of the user on the quantum cloud based on the set of attributes in relation to the record; selecting a social media platform registered to the quantum cloud; establishing a connection to the social media platform; retrieving user information and associated attributes from the social media platform using the connection; obtaining a secured token based on the user information and associated attributes; and providing a second verification of the user identity based on the first verification and the secured token.
Absstract of: US20260172257A1
The Legacy Crystal is a secure, AI-embedded crystal device that preserves and projects intergenerational family legacy data through encrypted offline storage, holography, and biometric access. The device enables interactive storytelling, guided onboarding, and symbolic transfer of family knowledge. The system is configured to transition from a headset-dependent experience to a self-contained projection platform with biometric or DNA-based access control, supporting evolving legacy preservation through local processing and secure memory storage.
Absstract of: US20260172363A1
0000 Methods and nodes for controlling service demand in a network including network nodes requesting and resource nodes delivering quantum entanglement generation, via a switch coupling them; the methods comprising: allocating the resource nodes via a physical layer; and using a control layer to calculate the corresponding allocation schedule and to execute a rate control method.
Absstract of: EP4760279A1
A method and detection system for detecting gauge waves from a quantum system. The method comprising generating a non-zero gradient in the time-component of the electric field, such that gauge waves are converted to electromagnetic waves and detecting transversal electromagnetic waves originating from the conversion. The non-zero gradient in the time component may be generated by a magnetic vortex. The magnetic vortex may be generated by a first magnetic field generator and a second magnetic field generator generating fields being oppositely directed along a magnetic axis and being subjected to an electric pulse applied perpendicularly to the magnetic field.
Absstract of: GB2632647A
A method for mutual authentication between a first party and a second party. The method comprises: generating a current shared key by exchanging one or more messages between the first and second parties; and authenticating the current shared key based on a previously authenticated shared key. In some examples, the current shared key may be authenticated based on both the previously authenticated shared key and the current shared key, and/or based on at least one secret value (e.g. random number) obtained by the first party and/or the second party. In some examples, authenticating the current shared key may comprise exchanging one or more messages between the first and second parties, wherein at least one of the messages is generated based on one or more of: the current shared key; the previously authenticated shared key; and the at least one secret value. In some examples, when the current shared key is determined to be authenticated, the current shared key may be stored to be used as a previously authenticated shared key when authenticating a new current shared key. Figures 3, 4 & 5 disclose different embodied variations with or without random numbers or with generating more than one new shared key.
Absstract of: EP4465555A1
0001 The present invention relates to Calibration system for calibrating a QKD emitter comprising said QKD emitter provided with a light source for generating light and an output connector for exiting the generated light, and a telecom characterization setup located at the output connector characterized in that the calibration system further comprises a pair of switchable connectors adapted to be switched between a first position where the connectors are exposed to the outside of the QKD emitter and a second position where the connectors are internally connected for providing a light path from the light source to the output connector, and an optical amplifier (5) connected to the connectors switched in the first position for calibration procedure.
Absstract of: WO2024243546A2
The inventors have developed methods and systems to address the above challenges using entangled photons with multiple colors transmitted with a classical data stream as a technique to detect eavesdropping on the data stream and to prevent reverse engineering for demodulating the entangled bits from the data stream. In some embodiments, a time gate is used to interleave the quantum and classic signals to provide quantum encryption of fiber optic communication protocols.
Absstract of: AU2024400578A1
Methods and apparatus for generating quantum entanglement detect success of entanglement attempts by monitoring output signals from one or more detectors for heralding patterns indicating that a pair of quantum systems is in an entangled quantum state. In response to detecting a heralding pattern that indicates a successful entanglement attempt a low latency signal is output on one or more signal lines; and a higher latency message is transmitted by a messaging interface. The higher latency message contains information that identifies the pair of quantum systems entangled by the successful entanglement attempt. The pair of quantum systems may be inhibited from participating in further entanglement attempts while further entanglement attempts are performed on other pairs of quantum systems.
Absstract of: BE1033110A1
La présente invention divulgue un procédé, un dispositif et un support de stockage pour l’échange multipartite d’informations basé sur des états GHZ, appartenant au domaine technique des communications quantiques. Le procédé comprend les étapes suivantes : tout d’abord, un STTP prépare des particules en état GHZ et les distribue ; les utilisateurs appliquent des opérateurs unitaires de type bit, puis renvoient les particules ; le STTP effectue une mesure conjointe et publie les résultats afin d’assister les utilisateurs dans la détermination de l’encodage ; ensuite, après l’échange, les utilisateurs appliquent une seconde fois des opérateurs et renvoient à nouveau les particules ; le STTP procède à une nouvelle mesure conjointe et publie les résultats, permettant aux utilisateurs de déduire les informations en clair des autres parties ; enfin, chaque partie calcule et diffuse une valeur de hachage, et si les valeurs sont cohérentes, l’échange est confirmé comme réussi.
Absstract of: US20260161360A1
The present disclosure relates to a security management device for mobile terminals based on quantum random numbers and a security management method for mobile terminals based on quantum random numbers for supporting authentication and identification of communication devices and safely transmitting/receiving and managing data through a hardware-based quantum security module. It is possible to prevent security vulnerabilities that may arise during communication by using the quantum random numbers generated by the first quantum random number generation unit and the second quantum random number generation unit, and by allowing the communication unit to encrypt the user communication data based on the authentication value generated by the quantum security module, it is possible to implement the safe data transmission. By allowing the communication module to verify the devices and the user authentication information in real time, it is possible to prevent the data leakage and unauthorized access on the network.
Absstract of: WO2026119496A1
The invention relates to a method for continuing to secure the communication between two communication partners of a vehicle ecosystem after a post-quantum threat (PQ) has occurred, for which purpose a key is exchanged between the communication partners by means of an authenticity-protected communication prior to the occurrence of the post-quantum threat (PQ). The invention is characterized in that a hybrid key encapsulation method is used for the exchange of the key, by means of which a conventional key and a post-quantum-resistant key are exchanged, from which a hybrid key is then formed by means of a derivation rule, wherein after the exchange of the two key components of the hybrid key, the option to exchange is locked or deleted.
Absstract of: US20260163723A1
0000 A communication system according to one aspect of the present disclosure is a communication system including a plurality of communication apparatuses, in which the communication apparatuses each include a key generation unit configured to generate a shared key for performing encrypted communication with another communication apparatus of the plurality of communication apparatuses by using one or more keys shared with the another communication apparatus by one or more key sharing methods, and an application program configured to perform encrypted communication with the another communication apparatus using the shared key.
Absstract of: DE102024004187A1
Die Erfindung betrifft eine Verifikationsbaugruppe (100) zur Verifikation der Sicherheit eines Quantenprotokolls, QKD, umfassend: einen Quantenkanaleingang (110); einen Weiterleitungsquantenkanal (130); einen Quantenkanalausgang (120); einen Anschluss (140) für eine Abhörleitung (140), der dazu vorgesehen ist, an einem öffentlichen Kommunikationskanal angeschlossen zu werden; und einen Kommunikationsanschluss (150) für eine Kommunikationsleitung (150), der dazu vorgesehen ist, mit einer externen Vorrichtung in bidirektionaler Kommunikation verbunden zu werden.
Absstract of: WO2026119419A1
A method for performing a quantum oblivious transfer protocol in a continuous-variable (CV) system is provided. The CV system comprises a transmitter and a receiver. The receiver comprises two secret bits and the transmitter comprises a secret choice bit, which is an index indicating one of the two secret bits of the receiver. The method comprises: modulating, by the transmitter, a plurality of quantum signals according to a discrete or continuous distribution in phase and amplitude using one or more coherent quantum states; sending, by the transmitter via a quantum channel, the plurality of modulated quantum signals to the receiver; detecting, by the receiver, one or more quadrature components of each of the received modulated quantum signals; and performing, by the receiver together with the transmitter, a post-processing procedure to learn, by the transmitter, the one of the two secret bits of the receiver corresponding to the secret choice bit.
Absstract of: US20260163721A1
0000 The present disclosure relates to methods of networking devices and corresponding network devices, computer programs, and non-transitory computer readable media. Methods can include those for establishing Media Access Control security (MACsec) key agreement (MKA) sessions.
Absstract of: WO2025093378A1
Disclosed is a method for sharing information using a data sharing system comprising a sender node and a receiver node using a noisy quantum channel in accordance with a quantum communication protocol, the method comprising: providing a trained machine learning model, the machine learning model being configured to receive a set of parameters of a given system and noise model in order to predict whether the given system is secure or unsecure for sharing information according to the quantum communication protocol, the set of parameters indicating a level of success of an attack by a third party and a reception success at a receiver node of the given system and being descriptive of the given system; evaluating the set of parameters for the data sharing system for sharing the information; inputting the evaluated set of parameters and the noise model to the machine learning model, thereby receiving a prediction of a security of the data sharing system; aborting the quantum communication protocol if the data sharing system is predicted as being unsecure.
Absstract of: WO2025061895A1
The invention relates to a node of a network, the node comprising a monolithically integrated entropy source having: a photon source that is designed to emit photons, the photon source comprising a first outer shell, said first outer shell being formed by a first base surface, a first top surface, and at least one first side surface connecting the first base surface and the first top surface to one another; and a photon detector that is designed to detect the photons emitted by the photon source, the first base surface of the photon source being arranged so as to face the photon detector.
Absstract of: EP4757237A1
An electronic device according to various embodiments may comprise: a main processor for performing an operation in a rich execution environment (REE) and a trusted execution environment (TEE); and a secure processor (223) physically separated from the main processor so as to perform an operation in a secure execution environment (SEE). The main processor may, in performing an electronic signature (sig) and key encapsulation mechanism (KEM) operation: identify a calculation speed when the operation is executed in any one of the TEE or the SEE; and on the basis of the identified calculation speed, differently determine an execution environment in which the sig and KEM operation is performed, and the execution environment comprises the SEE and the TEE.
Absstract of: EP4472127A1
The invention concerns a method for enhancing the privacy of delegated quantum computations, involving: a client (A) whose aim is to solve a computational problem based on sensitive data and/or using a sensitive algorithm, and a cloud computing service provider (B) who has quantum computing capacities superior to the client (A) and is therefore capable of solving the problem and/or running the client's desired algorithm; wherein the method comprises a sequence including the following steps: a) a light emitter (10) controlled by the client (A) emits at least one pulse (11) having a specific quantum state (S1), b) a quantum emitter (20) controlled by the provider (B) receives the pulse (11), c) the quantum emitter (20) emits a single photon (21) supporting a photonic qubit (Q2), with a relationship being defined between the quantum state (S1) of the pulse (11) and the photonic qubit (Q2). The invention also concerns a system for implementing this method.
Absstract of: US2025148071A1
0000 A system performs a set of cryptographic operations at least by utilizing an API to cause execution of a set of one or more secure element (SE) applications within the SE platform runtime environment of a first computing entity. The set of cryptographic operations include generating a first shared secret, generating a ciphertext at least by encapsulating the first shared secret with a first public key associated with a second computing entity in accordance with an encapsulation algorithm, and transmitting the ciphertext from the first computing entity to the second computing entity. The second computing entity derives the first shared secret by decapsulating the ciphertext with a private key corresponding to the first public key. The first computing entity and the second computing entity then exchange at least one encrypted message, encrypted with an encryption key that includes, or is based at least in part on, the first shared secret.
Nº publicación: US20260154441A1 04/06/2026
Applicant:
JPMORGAN CHASE BANK N A [US]
JPMORGAN CHASE BANK, N.A.
Absstract of: US20260154441A1
0000 A method may include: a first verifier receiving a request for position verification comprising a claimed position from a prover electronic device; the first verifier generating two first bitstrings and sending one of the bitstrings to a second verifier; the prover preparing two entangled quantum systems and sending one of the quantum systems to the first verifier; the first verifier measuring the first quantum system; each of the first verifier and the second verifier sending one of the bitstrings to the prover electronic device so that they arrive at the claimed position at the same time; the prover electronic device measuring the second quantum system and sending responses to the two verifiers with the measurement; the first verifier confirming that the responses were received within an expected time window and are valid.
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