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QUANTUM CRYPTOGRAPHY COMMUNICATION CONTROL DEVICE, QUANTUM CRYPTOGRAPHY COMMUNICATION SYSTEM, QUANTUM CRYPTOGRAPHY COMMUNICATION CONTROL METHOD, AND COMPUTER PROGRAM PRODUCT

Resumen de: EP4776563A1

In a quantum cryptography communication control device according to one arrangement, a collection unit collects link information of a link for which a local key is generated by quantum key distribution and a global key guarantee amount of each of a plurality of application pairs executing cryptography communication using a global key. A calculation unit calculates a link cost used for selecting a relay route of the global key based on the link information. A guarantee amount calculation unit calculates a local key guarantee amount allocated to the link for relaying the global key of each of the plurality of application pairs such that the guaranteed amounts of global keys for the plurality of application pairs are simultaneously satisfied. The selection unit selects the relay route of the global key based on the link cost and the local key guarantee amount.

ＢＢ８４プロトコル偏光状態をエンコードし補正するためのシステムおよび方法

Resumen de: WO2025012492A1

The invention relates to a system for encoding and correcting BB84 protocol polarisation states, which implements a method for measuring the polarisation error by carrying out said measurement before a step of transmitting the information and can be used in any system in which it is desired to implement quantum key distribution (QKD).

SYSTEM FOR MONITORING DISASTER ENVIRONMENT USING QUANTUM CRYPTOGRAPHIC COMMUNICATION AND METHOD PERFORMING THEREOF

Resumen de: KR20260109459A

본 발명에 따른 양자암호통신을 이용한 재난 환경 모니터링 시스템은 다양한 센서 데이터를 실시간으로 수집하고, 양자암호통신 모듈을 통해 암호 키를 공유하기 위한 랜덤 비트열을 생성하고 각 비트열을 양자 상태로 변환하여 중앙 모니터링 서버에 제공하고 상기 암호 키를 이용하여 상기 센서 데이터를 암호화하여 중앙 모니터링 서버에 제공하는 재난 감시용 스마트 컨트롤러 및 상기 재난 감시용 스마트 컨트롤러로부터 수신된 양자 상태를 측정하여 키 후보를 생성하고, 상기 키 후보 중 하나의 키를 최종 암호 키로 결정하고 상기 최종 암호 키를 이용하여 상기 암호화된 센서 데이터를 복호화하고, 상기 센서 데이터를 이용하여 재난 상태를 감시하는 중앙 모니터링 서버를 포함할 수 있다.

Universal Quantum Access Key ,UQAK,The Gateway to Eden, Wealth, and Infinite Possibilities for Every Person, Family, Industry, and Nation

Resumen de: US20260197160A1

0000 A computer-implemented Universal Quantum Access Key (UQAK) system provides quantum-secure identity authentication, policy-controlled authorization, domain-namespace routing, and interoperable settlement. A namespace resolver resolves a human-readable identifier, parcel identifier, subdomain identifier, or basepoint identifier to a signed endpoint record. An identity module authenticates a subject identity anchor. An event-ingestion module receives a digitally signed event record, transaction request, evidence commitment, or terminal-originated payment event. A Time-Proof engine binds the event to a time reference, validity window, and anti-replay value. A policy container loads a signed, versioned policy bundle or PackSet. A transaction authorization and minting engine executes a single atomic state transition that authorizes a protected action, binds an associated token, value unit, certificate, entitlement, or authorization state, generates a decision or mint receipt, and anchors a digest in a tamper-evident data structure. A clearing and settlement module generates a settlement receipt.

ELECTRONIC DEVICE FOR PROVIDING SECURITY FUNCTION, AND OPERATION METHOD THEREOF

Resumen de: US20260197188A1

0000 An electronic device may include: a main processor for performing an operation in a rich execution environment (REE) and a trusted execution environment (TEE); and a secure processor 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.

QUANTUM SECURITY METHOD AND QUANTUM SECURITY SYSTEM

Resumen de: US20260197159A1

A quantum security method, including: determining a session key; utilizing a hash function to process the session key to obtain a first string; combining the first string, a second string and a third string into a combined string; transmitting the combined string through at least one basis to generate a first single photon sequence, and transmitting the first single photon sequence to the receiver through a quantum channel; receiving the first single photon sequence and measuring the first string and the second string through the at least one basis to obtain a first return string and a second return string respectively, and transmitting a second single photon sequence; verifying the first return string, the second return string and a third return string sequentially to obtain a first verification result; and utilizing the hash function to verify the session key to obtain a second verification result.

COLLUSION-RESISTANT IDENTITY-BASED AND QUANTUM-RESILIENT SECURE CORRELATION SCHEMES

Resumen de: US20260197161A1

Techniques for securing a digital ecosystem are disclosed. In embodiments, a method includes storing a master QNA object comprising s symmetric matrices, each having d rows. The master QNA is structured to allocate correlated QNA objects to cohorts of the digital ecosystem based on credentials of the cohorts. The method includes receiving a unique identifier of a cohort being admitted to the ecosystem; determining a set of s selection values based on the unique identifier of the new digital cohort and a selection function; and allocating a new QNA object comprising s vectors to the cohort based on the s selection values and the s matrices. Each selection value is between 1 and d and corresponds to a respective composite matrix of the s composite matrices such that each selection value indicates a specific row of the respective matrix to which the selection value corresponds.

METHODS AND APPARATUS FOR SELECTING A SECURITY PROFILE IN A WIRELESS COMMUNICATION SYSTEMS

Resumen de: US20260197637A1

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). Embodiments disclosed herein relate to methods and systems for selecting a security profile in communication network. More specifically, embodiments disclosed herein relate to methods (500, 900, 2100) and systems (200) to perform a security profile selection procedure for wireless communication networks. The proposed method (500, 900, 2100) provides Post Quantum Cryptography (PQC) or quantum cryptography based security profile selection in wireless communication networks. The method (500, 900, 2100) discloses a plurality of post quantum based security profiles in User Equipment (UE) (202), mechanisms and procedures involved in selection of security profiles, which are mainly used in maintaining subscriber privacy during primary authentication procedure between the UE (202) and the communication network (204). The selected security profiles can be further used for data encryption between the UE (202) and the communication network (204). The mechanism dynamically selects the security profile that can provide better security in a given network environment.

System and method for quantum-based data encryption and transmission

Resumen de: US20260197162A1

0000 A system for implementing security measures to a data packet is disclosed. The system assigns each computing device with a respective encryption key. A first computing device encrypts the data packet with a first encryption key upon creation and/or before transmission. The first computing device encodes the data packet with a quantum encryption key and communicates the encoded data packet to a second computing device. The second computing device determines whether the data packet is received without being intercepted. In response to determining that the data packet is received without being intercepted, the second computing device decrypts the data packet.

QKD DEVICE, QKD SYSTEM, QKD CONTROL METHOD, AND COMPUTER-READABLE MEDIUM

Resumen de: EP4773543A1

According to an arrangement, a QKD device (2) includes a detection unit (21), a monitoring unit (24), and a switching control unit (25). The detection unit (21) is configured to detect a quantum signal by photons transmitted from a transmitting quantum key distribution (QKD) device. The monitoring unit (24) is configured to monitor monitoring information including a parameter based on the quantum signal. The switching control unit (25) is configured to transmit, to the transmitting QKD device (1), a switching signal for switching from a normal mode to a debug mode for enhancing intensity of the quantum signal by a predetermined value, based on the monitoring information.

量子鍵配送におけるトラステッドノードを使用する通信方法及びシステム

Resumen de: EP4485842A1

The present invention relates to a QKD communication method between a first node A and a second node B through at least one intermediary node T, comprising the steps of generating, at the first node A, a key K, which is symmetrically encrypted using a key K' to create a resulting encrypted key m, encrypting, at the first node A, said message m with a key K₁ and sending this encrypted message as well as K₁ to said intermediary node T, decrypting, at said intermediary node T, the message sent from said first node A with K₁ to obtain m and then OTP-encrypting said message m with a key K₂ and sending this encrypted message as well as the key K₂ to said second node B, and decrypting, at the second Node B, the message sent from T with K₂ to obtain m and symmetrically decrypts m with the key K' to recover the key K, characterized in that K' is obtained by the steps of generating, at the first node A, a key K' and a message m' to be sent to the second node B, sending the message m' to the at least one intermediary node T via a classical communication channel, which in turn forwards it to the second node B, and obtaining, at the second node, the key K' by using a private key and the message m'.

METHOD AND SYSTEM TO ESTIMATE RISK FOR A SOFTWARE APPLICATION DUE TO QUANTUM THREAT

Resumen de: US20260187252A1

Conventional risk estimation techniques perform dynamic analysis of application or use models which require training data. Present disclosure provides method and system to estimate risk for a software application due to quantum threat by static analysis. A set of records pertaining to the application is received and parsed to obtain application, crypto and platform parameters. In addition, list of quantum vulnerable algorithms, number of Qubits required to break a cryptographic algorithm used by the application and a current Qubit number are also received. Then, value of Quantum Day is determined based on the current Qubit number and the number of Qubits required to break the cryptographic algorithm used by the application. Further, SOD (Severity, Occurrence, Detection) scores are calculated for each parameter, and they are multiplied to determine Risk Priority Number (RPN) for each parameter. Finally, RPNs of all parameters are summed up to estimate overall risk of the application.

DEVICE AND METHOD FOR PERFORMING QUANTUM STATE MODULATION ON BASIS OF QUANTUM AUTHENTICATION IN QUANTUM COMMUNICATION SYSTEM

Resumen de: US20260189388A1

The present disclosure relates to a quantum communication system. Particularly, the present disclosure relates to a device and a method for performing quantum state modulation based on quantum authentication in a quantum communication system.

SYSTEMS AND METHODS FOR PRACTICAL QUANTUM POSITION-BASED KEY EXCHANGE

Resumen de: US20260189377A1

0000 A method may include: a third-party receiving a claimed position from a prover; the third-party and the prover exchanging quantum information; the third-party generating a third-party raw key based on the quantum information; the prover generating a prover raw key based on the quantum information; the third-party and the prover performing classical post-processing based on the raw keys; the third-party sending, a position verification request with the claimed position to a first verifier and a second verifier; the first verifier and the second verifier sending classical messages and a quantum system to the prover to arrive at a target time; the prover measuring the quantum system using the classical messages; the prover sending responses to the verifiers; the verifiers validating the responses and confirming that the responses were received within an expected time window; and the first verifier informing the third-party of a result of the validation.

CONTINUOUS VARIABLE QUANTUM KEY DISTRIBUTION SYSTEM AND METHOD

Resumen de: US20260189376A1

A CV-QKD system comprising a plurality of transmitters, one or more splitters, and a plurality of receivers is provided. Each transmitter modulates a quantum signal according to a discrete or continuous distribution in phase and amplitude. Each splitter distributes N modulated quantum signals, received from a respective transmitter or from another splitter, into M modulated quantum sub-signals. Each receiver is configured to: receive, via a respective quantum channel, a modulated quantum sub-signal associated to one or more of the transmitters from the one or more splitters; detect one or more quadrature components of the received modulated quantum sub-signal; and perform a respective post-processing protocol with one or more of the plurality of transmitters to generate one or more individual final secret keys between the one or more transmitters and the receiver and/or one or more common secret keys between the one or more transmitters and the plurality of receivers.

Anisotropic Compliance Matrix with Integrated Thermal Isolation

Resumen de: US20260191048A1

0000 A wafer-scale silicon substrate includes patterned through-silicon spring structures forming a mechanical-compliance matrix that provides controlled anisotropy of stiffness and thermal conductivity across the wafer. Rigid silicon islands support semiconductor stacks, while compliant regions of varying geometry and density isolate thermally active zones and relieve mechanical stress. The compliant regions may combine V-beam and spiral geometries to tune directional stiffness and heat flow. A multilayer redistribution network extends across the compliant regions, preserving electrical continuity while maintaining the designed anisotropy. The structure yields a wafer-scale substrate with engineered mechanical and thermal properties for large heterogeneous chip assemblies.

SYSTEM AND METHOD FOR TRUSTLESS KEY PROVISIONING

Resumen de: US20260189373A1

A method includes providing a shared secret data to a device and also to a security service; using the provided shared secret data to provide a root key; and using the root key as a basis for a sequence of stages, wherein each stage comprises an operation which converts a start key into a different generated key, and the same stages are carried out in parallel at the device and at the security service. The root key is used as the start key for a first stage of the sequence, and a generated key produced by each stage of the sequence, except for the final stage of the sequence, is used as a start key for a next stage of the sequence. The keys produced by the last sequence stage at the device and at the security service are used to authenticate the device to the security service.

Method and System for determining a cryptographic key

Resumen de: US20260189374A1

0000 The present invention proposes a computer implemented method and system for determining a cryptographic key. The method comprises constructing a tensor network with parameters representing a candidate cryptographic key; adjusting the parameters of the tensor network; generating a candidate key sample and obtaining a candidate ciphertext obtained with the candidate cryptographic key; calculating a cost function with respect to a target ciphertext, measuring an overlap between the target ciphertext and the candidate ciphertext, determining whether the overlap has reached a threshold value. If threshold value is not reached, repeating the method by further adjusting the parameters of the tensor network, if the threshold value is reached, determining that the candidate cryptographic key is the cryptographic key.

QUANTUM KEY DELIVERY NETWORK, LINK SETTING METHOD FOR KEY RELAY, DATA RELAY SYSTEM, AND DATA RELAY METHOD

Resumen de: EP4770006A1

A quantum key distribution network (NW_QKD) includes a plurality of QKD nodes (10) and a QKDN controller (20). The plurality of QKD nodes (10) perform key relays by a quantum key distribution link (L) and a network thereof. The QKDN controller (20) divides the plurality of QKD nodes (10) into a plurality of independent colonies (C) so as to equalize throughputs of the key relays, and sets routes from a colony (C_S) including a first QKD node (10_S) that is a start point of the key relays to a colony (C_R) including a second QKD node (10_r) that is an end point of the key relays so that a route for each key traverses a different colony (C) so that a single QKD node (10) does not supply keys to a plurality of routes.

NEUTRINO-BASED KEY EXCHANGE OVER A TRUSTED NODE

Resumen de: EP4770003A1

Verwendung eines Neutrino-Detektors als vertrauenswürdiger Knoten (Trusted Node) in einem Verfahren zum kryptographischen Schlüsselaustausch zwischen einem ersten Kommunikationsendpunkt und einem zweiten Kommunikationsendpunkt, wobei der Neutrino-Detektor:- über einen ersten Neutrino-basierten Kommunikationskanal einen ersten kryptographischen Schlüssel von dem ersten Kommunikationsendpunkt empfängt,- über einen zweiten Neutrino-basierten Kommunikationskanal einen zweiten kryptographischen Schlüssel von dem zweiten Kommunikationsendpunkt empfängt,- die beiden kryptographischen Schlüssel in einem Schlüsselspeicher speichert,- über einen öffentlichen Kommunikationskanal eine am ersten Kommunikationsendpunkt erzeugte Zufallszahl (RND) empfängt, die unter Verwendung des ersten kryptographischen Schlüssels verschlüsselt ist,- die Zufallszahl (RND) unter Verwendung des gespeicherten ersten kryptographischen Schlüssels entschlüsselt und- die entschlüsselte Zufallszahl (RND) unter Verwendung des im Schlüsselspeicher gespeicherten zweiten kryptographischen Schlüssels verschlüsselt und über einen öffentlichen Kommunikationskanal an den zweiten Kommunikationsendpunkt sendet, um dem zweiten Kommunikationsendpunkt die Rekonstruktion der Zufallszahl (RND) unter Verwendung des ihm bekannten zweiten kryptographischen Schlüssels zu ermöglichen, sodass dem ersten und dem zweiten Kommunikationsendpunkt eine gemeinsame Zufallszahl (RND) als kryptographischer Schlüssel z

NEUTRINO-BASED QUANTUM SECURE KEY EXCHANGE SYSTEM

Resumen de: EP4770002A1

Verfahren zum Austausch eines kryptografischen Schlüssels zwischen einem Sender und einem Empfänger unter Verwendung eines Neutrino-basierten Kommunikationskanals, umfassend die Schritte:Senderseitige Erzeugung eines Neutrino-Strahls durch:- Beschleunigen von Protonen in einem Protonenstrahl,- Auslenkung des Protonenstrahls auf ein Target zur Erzeugung von Neutrinos durch den Zerfall kurzlebiger Teilchen;Senderseitige Generierung einer Folge von Zufallsbits, die den kryptografischen Schlüssel repräsentiert, und Kodierung der Zufallsbits durch:- Steuerung der Auslenkung des Protonenstrahls mittels eines steuerbaren Ablenksystems, um entsprechend der Zufallsbits den Protonenstrahl entweder auf das Target oder auf einen Absorber zu lenken, wodurch die Zufallsbits als Neutrino-Pulse kodiert werden;Übertragung der Neutrino-Pulse vom Sender zum Empfänger;Synchronisierung von Sender und Empfänger mittels einer Zeitsynchronisationseinheit, die die Taktung der erzeugten Neutrino-Pulse mit Zeitfenstern des Empfängersystems synchronisiert;Empfang der Neutrino-Pulse durch einen Neutrino-Detektor des Empfängers, wobei:- Zerfallsprodukte, insbesondere Lichtsignale, die bei der Wechselwirkung der Neutrinos mit einem Detektormedium erzeugt werden, detektiert werden und- die detektierten Signale jeweils einem Schlüsselbit zugeordnet werden;Speicherung und Aneinanderreihung der empfangenen Schlüsselbits zur Erzeugung des kryptografischen Schlüssels, der in einem Schlüsselspeicherm

密文量子密钥管理与中继方法及系统

Resumen de: CN122316608A

本发明公开了一种密文量子密钥管理与中继方法及系统，方法包括向中继节点下发路由控制信息及第一加密信息，以使所述中继节点基于所述第一加密信息将其从所连接的QKD设备接收的量子密钥密文转换为量子密钥明文异或值，并将所述量子密钥明文异或值按照所述路由控制信息指定方式中继至目的节点；所述量子密钥密文为QKD设备利用本地密钥加密密钥加密其生成的量子密钥得到，所述第一加密信息携带有与所述密钥加密密钥相同的第一密钥加密密钥；本发明中KM不掌握量子密钥的加密密钥，在进行密钥中继过程中不会出现量子密钥明文，从而降低了量子密钥泄露的风险。

양자 통신 프로토콜의 보안 증명

Resumen de: WO2025093379A1

Disclosed is a method for sharing information between a sender node and a receiver node in accordance with a quantum communication protocol. The method comprises: determining an attack configuration for access by a third party to the quantum channel, the attack configuration being defined by at least a quantum circuit system having specific parameters and an attack success bound, the quantum circuit system being configured to intercept a qubit on the quantum channel, determine the state of the intercepted qubit; using the quantum circuit system to measure first and second metrics by at least intercepting qubits on the quantum channel; determining whether the second metric fulfils an error tolerance bound and whether the first metric fulfills the attack success bound; aborting the communication protocol if the second metric fulfils the error tolerance bound and the first metric fulfills the attack success bound.

SISTEMA Y METODO DE AUTENTIFICACION Y VALORACION FINANCIERA BASADAS EN ESTRUCTURAS MODULARES Y CRIPTOGRAFIA POST-CUANTICA

Delay time error measurement device based on fiber optic interferometer

Nº publicación: KR20260100044A 29/06/2026

Solicitante:

EAST PHOTONICS CO LTD [KR]
\uC8FC\uC2DD\uD68C\uC0AC \uC774\uC2A4\uD2B8\uD3EC\uD1A0\uB2C9\uC2A4

Resumen de: KR20260100044A

0001a 본 발명은 광섬유 간섭계 기반의 지연 시간 오차 측정 장치에 관한 것으로서, 상세하게는 포토커플러에 의해 포톤 신호를 두 개의 경로로 나누고, 하나는 피드백 회로로, 다른 하나는 10센티미터 거리로 지연되도록 제어하는 기술을 제공하는 것으로서, 이를 통해 시간 지연 오차를 1ps 이하로 유지하며 신뢰성을 확보할 수 있는 광섬유 간섭계 기반의 지연 시간 오차 측정 장치에 관한 것이다. 본 발명에 의하면, 기준 경로와 감지 경로 사이의 시간 차이를 500ps로 고정하고 그 오차를 1ps 이하로 억제함으로써, 두 신호가 광섬유 마이켈슨 간섭계에서 형성하는 간섭 패턴의 위상차를 정확하게 제어할 수 있다. 이를 통해 수신부에서 검출되는 간섭무늬가 선명하게 유지되며, 양자 비트(Quantum Bit) 판별 시 발생하는 시간적, 위상적 오차가 최소화된다.