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QUANTUM KEY DISTRIBUTION SYSTEM, TRANSMITTER, RECEIVER AND METHOD

Resumen de: US20260246625A1

An auto-compensating QKD system. The system includes a QKD transmitter and a QKD receiver. The QKD receiver is configured to send an initial optical pulse train to the QKD transmitter and to receive a reference optical pulse train followed by a signal optical pulse train from the QKD transmitter. The QKD transmitter is configured to receive the initial optical pulse train from the QKD receiver and to send the reference optical pulse train and the signal optical pulse train to the QKD receiver.

METHOD FOR THE IMPLEMENTATION OF LEFT-NODE AUTHENTICATION IN HASH-BASED SIGNATURES XMSS AND LMS

Resumen de: US20260246624A1

0000 A computer-implemented method utilizing an algorithmic-based approach to find a memory-efficient left-node authentication path in XMSS and LMS post-quantum cryptography algorithms that includes providing a computer with at least one processor operably configured to carry out a post-quantum cryptographic authentication session having an authentication path and operably configured to execute computer readable instructions having an algorithm with three subroutines, a first subroutine that includes generating an index value integer of authentication path nodes within the authentication path needing updating, a second subroutine that includes initializing a left node variable and initializing a right node variable based on a generated leaf position, and a third subroutine that includes iterating the left and right node variables with a merging operation until reaching the index value integer and swapping the left node variable with an indexnode within the authentication path.

CROSS-INDUSTRY ADAPTIVE ACCESS CONTROL AND ASSET MANAGEMENT SYSTEM WITH PROOF-OF-EFFORT BLOCKCHAIN ARCHITECTURE

Resumen de: US20260244773A1

A system for adaptive access control and asset management comprises a metric collection layer configured to capture real-time user metrics from integrated systems. A blockchain layer provides an immutable, quantum-resistant ledger for storing access events, asset records, and compliance data. An authorization layer manages adaptive access control based on effort scores, access thresholds, and effort decay mechanisms. A data integration layer interfaces with external applications for data access, analytics, and reporting. The metric collection layer captures task completion, accuracy, and engagement metrics. The blockchain layer employs a hybrid model combining on-block and off-block storage. The authorization layer includes a BlockCipher Module for making access decisions based on calculated effort scores and predefined thresholds. The data integration layer facilitates integration of AI algorithms for behavior analysis and predictive insights. The system enables secure, adaptive access control and asset tracking across industries like finance, healthcare, supply chain, and government sectors.

SECURE TRANSMISSION

Resumen de: US20260238680A1

A method of monitoring a transmission includes obtaining one or more values of bit error rate (BER) of the transmission received at a receiver; and determining that the transmission has been intercepted based on a deviation of the obtained bit error rate value from an expected bit error rate value.

QUANTUM COMMUNICATION SYSTEM USING CORRECTION OF THE POLARIZATION OF PHOTONS

Resumen de: US20260238350A1

0000 A receiver is provided for receiving a multiplexed signal and an optical signal that are transmitted independently through a transmission channel, the multiplexed signal including a first quantum signal (Q) and at least one polarization state control signal, the optical signal including a second quantum signal (Q), the receiver having a processing chain and a correlation module associated with a polarization base of at least one polarization state, the chain being designed to determine the polarization state of the control signal and to modify the polarization of the multiplexed signal so as to align the determined state with the state of the base, the module being configured to carry out a correlation measurement between the first and second quantum signals and to generate, based on the measurement, at least one information signal regarding the entanglement state of the first and second quantum signals.

Systems and Methods for a Quantum Safe Certificate Ledger

Resumen de: US20260238465A1

0000 A quantum safe blockchain system can operate with quantum safe blockchain nodes (QSBN) and validators. A QSBN can generate a pending register certificate transaction comprising a public key, a fingerprint for a certificate, a URL for the certificate, a first registration number for a parent certificate of the certificate, and a digital signature. The QSBN can transmit the pending register certificate transaction to the quantum safe blockchain system. A validator can receive the pending transaction, validate the digital signature using the public key and include a confirmed register certificate transaction in a block. The confirmed transaction can include a second registration number for the certificate. The QSBN can receive the confirmed transaction and store in a database the fingerprint, the first registration number, and the second registration number. The QSBN can generate a pending certificate revocation transaction for the certificate, and transmit the pending transaction to the blockchain system.

PHOTON DETECTOR, QUANTUM CRYPTOGRAPHY SYSTEM, AND CIRCUIT

Resumen de: US20260238466A1

There is provided a photon detector including an avalanche photodiode, a bias voltage application circuit that applies a bias voltage to an input of the avalanche photodiode, a gate voltage application circuit that applies a gate voltage for superimposing an alternating-current component on the bias voltage, a filter disposed on an output side of the avalanche photodiode, and an impedance adjustment circuit disposed between the avalanche photodiode and the filter.

METHOD AND SYSTEM FOR FACILITATING POST QUANTUM SECURE PRIMARY AUTHENTICATION OF A SUBSCRIBER

Resumen de: US20260239002A1

0000 The present disclosure relates to a 5G communication system or a 6G communication system for supporting higher data rates beyond a 4G communication system such as long term evolution (LTE). The present disclosure relates to a method and system for facilitating post quantum secure primary authentication of a subscriber. The method by an UE discloses applying a quantum safe cryptographic technique on a quantum based public key associated with a home network, generating an encrypted quantum safe shared key based on the applied quantum safe cryptographic technique, transmitting the encrypted quantum safe shared key along with cipher-text value and MAC-tag value associated with the subscriber to a network entity for authenticating the subscriber.

SYSTEM FOR DISTRIBUTING QUANTUM KEYS USING CORRECTION OF THE POLARIZATION OF PHOTONS

Resumen de: US20260238352A1

0000 A transmitter of a multiplexed signal through a transmission channel includes a generator of an initial quantum signal, of a first reference signal and of a second reference signal, an encoder having N optical channels including a selector for passing the initial signal to one of the channels, and a recombiner for generating the multiplexed signal, the multiplexed signal including first and second signals (R<11>, R<12>) for controlling first and second polarization-encoding values (P<1>, P<2>), respectively, and a quantum signal, determined based on the initial signal, encoded with an encoding value. The optical channels include two channels each including a unit for integrating a reference signal into the channel, each control signal being determined based on one of the reference signals delivered by the channel in question to the recombiner.

METHODS, DEVICES, AND SYSTEMS FOR EFFICIENT MULTINOMIAL DISTRIBUTION SAMPLING

Resumen de: WO2026167080A1

Methods and systems for efficient sampling from probability distributions using flexible transformation approaches. The invention encompasses multiple transformation techniques, including but not limited to reparametrization methods and various distribution families, implemented through configurable hardware and software architectures, providing robust solutions for sampling challenges across different computational environments. The method is particularly suitable for hardware-accelerated implementations, allowing scalable and low- latency sampling. Applications span from stochastic process simulation to optimization in machine learning algorithms, inference tasks, and quantum communication systems including Quantum Key Distribution protocols requiring entropy-efficient, cryptographically secure sampling operations.

METHOD AND APPARATUS FOR HANDLING SECONDARY NODE OPERATIONS IN MULTI-RAT DUAL CONNECTIVITY

Resumen de: US20260239122A1

The present disclosure relates to a 5G communication system or a 6G communication system for supporting higher data rates beyond a 4G communication system such as long term evolution (LTE). The method includes receiving at least one User Equipment (UE) capability information from at least one UE, wherein the at least one UE capability information comprises a Post Quantum Cryptography (PQC) information, transmitting an SN addition request message to at least one SN with the PQC information, based on the at least one UE capability information, receiving an SN addition request acknowledge message from the at least one SN, if PQC is supported between the at least one UE and the at least one SN, and receiving an SN addition request reject message from the at least one SN, if PQC is not supported between the at least one UE and the at least one SN.

QUANTUM CRYPTOGRAPHY IN AN INTERNET KEY EXCHANGE PROCEDURE

Resumen de: EP4790952A2

In some implementations, a first network device may communicate, with a second network device, one or more internet key exchange (IKE) messages to exchange a first identifier associated with the first network device and a second identifier associated with the second network device, and to indicate that a post-quantum preshared key (PPK) is to be used as a shared key for an IKE security association (SA) between the first network device and the second network device. The first network device may obtain, from a key management entity (KME), a quantum key based on providing the second identifier to the KME, wherein the PPK is based on the quantum key. The first network device may communicate, with the second network device, one or more IKE authentication messages to exchange a third identifier associated with the quantum key and to confirm that the second network device successfully obtained the PPK.

FIRST PRIVATE KEY VERIFICATION METHOD, TERMINAL DEVICE, SYSTEM, COMPUTER PROGRAM, AND COMPUTER-READABLE STORAGE MEDIUM

Resumen de: EP4790945A1

0001 Es wird ein Verfahren zur Verifizierung eines ersten privaten Schlüssels angegeben, der mittels Quantenschlüsselverteilung erzeugt ist, umfassend ein Bereitstellen des ersten privaten Schlüssels an eine Endbenutzerapplikation (2) von einer Benutzerapplikation (4) einer ersten Vorrichtung (5) über eine lokale Verbindung (8), ein Senden einer ersten Identifikationsinformation von der Endbenutzerapplikation (2) oder der Benutzerapplikation (4) an eine Zwischeninstanz (6), wobei die erste Identifikationsinformation charakteristisch für den ersten privaten Schlüssel ist, ein Empfangen einer Verifizierungsantwort von der Endbenutzerapplikation (2) oder der Benutzerapplikation (4) von der Zwischeninstanz (6), wobei die Verifizierungsantwort charakteristisch ist für einen Abgleich der ersten Identifikationsinformation und einer zweiten Identifikationsinformation, wobei die zweite Identifikationsinformation charakteristisch ist für den zweiten privaten Schlüssel, der auf einer zweiten Vorrichtung (7) hinterlegt ist, und ein Verifizieren des ersten privaten Schlüssels von der Endbenutzerapplikation (2) oder der Benutzerapplikation (4) in Abhängigkeit der Verifizierungsantwort. 0002 Des Weiteren werden eine Endvorrichtung, ein System, ein Computerprogramm und ein computerlesbares Speichermedium angegeben.

END-TO-END TRANSPORT LAYER SECURITY

Resumen de: US20260230303A1

0000 The present disclosure relates to exchanging information between a start node and an end node. Based on the information session keys for a connection comprising the start node, the end node, and at least one intermediate node are established. The session keys include a data encryption session key and a Message Authentication Code (MAC) session key. The data is encrypted using the data encryption session key at the start node. MAC is generated using the MAC session key. The encrypted data is relayed, via the at least one intermediate node, from the start node to the end node without the at least one intermediate node re-encrypting the data.

REMOTE SERVICE PROVISIONING METHOD, EMBEDDED UNIVERSAL INTEGRATED CIRCUIT CARD AND REMOTE SERVICE PROVISIONING PLATFORM

Resumen de: US20260230827A1

0000 Remote service provisioning method for EUICC cards, to provide secure communication against quantum computing attacks, comprising: providing a GQ-eUICC card comprising a GQ-module, with post-quantum cryptography algorithms, and an eUICC card, generating one or more interfaces in response to connection requests to SM-DP+ and/or SM-DS service subscription servers; establishing session keys by means of post-quantum algorithms; encapsulating all the payload without modifications by means of a QIF tunnel, generated by the post-quantum cryptography algorithms; sending encapsulated communication interfaces to a QDS and/or QDP+ provisioning platform; decapsulating the encapsulated communication interfaces; establishing a connection between the QDS and/or QDP platforms and the SM-DP+ and/or SM-DS subscription servers using an i-ESx tunnel based on symmetric exchange, which encapsulates the original interfaces; establishing through an interface a secure communication between the SM-DP+ and/or SM-DS subscription servers and a service provider; and establishing a secure communication between the service provider and the eUICC.

A SYSTEM FOR CRYPTOGRAPHIC AGILITY WITH PROXY TASK MANAGEMENT

Resumen de: US20260230313A1

A method of cryptographic agility for post-quantum cryptography by swapping a ciphersuite is provided. The method can include performing, by a configuration agent or proxy, cryptography based on a current ciphersuite. The method can further include receiving, by the configuration agent and from a configuration orchestrator, instructions to invoke a protocol to swap the current ciphersuite. The method can further include invoking, by the configuration agent, the protocol to swap the current ciphersuite. The method can further include communicating, by a quantum secure layer (QSL) agent, a next ciphersuite from a set of ciphersuites to a key distribution center (KDC). The next ciphersuite can comprise a post-quantum ciphersuite, such as a next asymmetric or symmetric algorithm, cryptographic random number generator, or cryptographic hash function. The method can further include replacing the current ciphersuite with the next ciphersuite and performing cryptography based on the next ciphersuite.

ENCRYPTED COMMUNICATION METHOD, NON-TRANSITORY COMPUTER-READABLE RECORDING MEDIUM, AND CONNECTED DEVICE

Resumen de: US20260230317A1

0000 In an encrypted communication method, a public key (a first encryption key) is generated using a random seed stored in advance, a random number to be shared with a connected device to be communicated with is obtained through communication using the public key (the first encryption key) generated, and encrypted communication with the connected device is performed using a cryptographic scheme that is usable by using the obtained random number as a symmetric key (a second encryption key).

AI-Quantum Middleware and Operating System for Distributed, Modular, Post-Quantum Secure Hybrid Workload Execution and Autonomous Decision Optimization

Resumen de: US20260230312A1

A modular artificial intelligence (AI) and quantum computing middleware system enables real-time, post-quantum secure hybrid workload orchestration across classical and quantum-simulated environments. The system includes a tensor factorization engine that emulates 60-100+ qubit-scale inference using classical infrastructure, a universal API gateway for cross-platform model execution, and a cryptographic security layer implementing continuous-variable quantum key distribution (CV-QKD) and lattice-based encryption. Additional modules support swarm coordination using quantum tensor networks, explainable AI for compliance traceability, and a digital twin interface for real-time validation. The invention enables secure, scalable deployment in edge-native, cloud-based, and air-gapped environments for aerospace, defense, and intelligent infrastructure applications.

System and Method for Adaptive Virtual Reality Assistance with Real-Time Companion Intelligence

Resumen de: US20260228979A1

0000 A system provides adaptive assistance through virtual reality and artificial intelligence. The system includes a data acquisition module receiving multimodal input data from sensors, a virtual reality module generating an interactive virtual environment, and a processor that processes the input data to generate user state data and virtual companion data. The processor dynamically modifies parameters of the virtual environment based on processed data. A memory stores input data, processed data, behavioral models, and environment configuration data. A backend platform processes and transmits data to remote devices through a communication interface. The virtual reality module renders a virtual companion within the interactive virtual environment according to the virtual companion data and modifies the environment based on processed parameters. This system architecture enables real-time adaptation of both the virtual companion and virtual environment in response to user interactions and states.

QUANTUM-RESISTANT ARCHITECTURE

Resumen de: US20260230309A1

0000 Systems, methods, and computer-readable media are disclosed. A system can include a cyber resilience system configured to receive or identify cyber resilience data corresponding with at least one cyber resilience operation performed in at least one decentralized network, centralized network, or data source (DNCNDS). The system can include a cryptography system configured to apply a quantum-resistant model to cause the quantum-resistant model to generate a protected data package including at least the cyber resilience data, generate, using a post-quantum signature scheme, one or more digital signatures of the protected data package, and store the protected data package and the one or more digital signatures with the at least one DNCNDS. The system can include a secure data channel configured to provide the protected data package via at least one of an identifier, interface, or endpoint within the at least one DNCNDS or external to the at least one DNCNDS.

SINGLE STAGE MULTIPLY-ACCUMULATE (MAC) BUTTERFLY MULTIPLIER CIRCUIT FOR NUMBER THEORIC TRANSFORMS

Resumen de: US20260230311A1

Disclosed are systems, apparatuses, processes, and computer-readable media for sharing encrypted entropy. For example, a method includes determining a plurality of second coefficients from a plurality of first coefficients in association with a Numeric Theoric Transform (NTT), wherein each second coefficient of the plurality of second coefficients is generated based on a corresponding first coefficient of the plurality of first coefficients using a shared stage multiplier circuit; and generating an encryption key based on the plurality of second coefficients.

PROVIDING QUANTUM-SAFE COMMUNICATIONS SECURITY OVER AN INSECURE NETWORK

Resumen de: US20260230310A1

An initial true random number is generated. A hybrid key pair is generated based on the initial true random number. The hybrid key pair includes a first key pair generated by a quantum-safe cryptographic algorithm and a second key pair generated by a cryptographic algorithm. A system request is provided to an entropy service. The system request includes the hybrid key pair. Quantum entropy data included in a response received from the entropy service is decrypted. The response includes a public key associated with the entropy service. The decrypted encrypted quantum entropy data is utilized for cryptographic operations.

KEY MANAGEMENT APPARATUS, KEY MANAGEMENT METHOD, AND DATA STORING SYSTEM

Resumen de: US20260230314A1

A key management apparatus includes a determination unit that determines a predetermined number of participants among a plurality of participants for storing divided data obtained by division from predetermined data by secret distribution processing, as participants for encrypting and storing the divided data by using a quantum encryption key, and a key transmission unit that transmits an encryption key used to encrypt the divided data to each of the predetermined number of participants by quantum key distribution. The determination unit determines the predetermined number of participants based on a number of hops of a key relay from the key management apparatus to each participant in the quantum key distribution.

SYSTEMS AND METHODS FOR CERTIFIED QUANTUM RANDOMNESS EXPANSION USING RANDOM CIRCUIT SAMPLING

Resumen de: US20260230316A1

A method may include: selecting a random quantum circuit from a family of random quantum circuits; communicating the selected random quantum circuit to a quantum device, wherein the quantum device applies the selected random circuit to its internal state and measures the internal state to obtain a bit string; calculating a probability that the bit string is a result of the selected random quantum circuit; repeating the communicating, the receiving, and the calculating using the selected random quantum circuit or a new random quantum circuit for a number of rounds; collecting a tuple comprising the random quantum circuit communicated to the quantum device, the bit string received from the quantum device, and the probability; computing a validation value for the tuples; validating the validation value; outputting the bit strings to a quantum-proof randomness extractor, wherein the quantum-proof randomness extractor returns a final bit string; and outputting the final bit string.

CRYPTOGRAPHIC SCHEMES FOR HYBRID CLASSICAL-QUANTUM COMPUTER SYSTEMS

Nº publicación: AU2025211157A1 06/08/2026

Solicitante:

RIGETTI AUSTRALIA PTY LTD
RIGETTI UK LTD
RIGETTI & CO LLC
RIGETTI AUSTRALIA PTY LTD.
RIGETTI UK LTD.
RIGETTI & CO, LLC

Resumen de: AU2025211157A1

In a general aspect, hybrid classical-quantum cryptographic systems are presented. In some implementations, a hybrid computer system includes a quantum computing system and a classical computing system configured to obtain a message to send to a recipient; obtain a shared secret that includes a quantum logic circuit and is known by the recipient; generate an encrypted version of the message based on the quantum logic circuit; and send the encrypted version of the message to the recipient.