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REVEALING UNIT, COMPUTING SYSTEM AND METHOD FOR REVEALING BLINDING ATTACKS

Resumen de: WO2026109394A1

A revealing unit (100) for revealing a blinding attack in a computing system (102), pref- erably in a Quantum Key Distribution system, is described. The revealing unit (100) comprising a revealing nanowire (104); wherein the revealing unit (100) is configured, in the event of a blinding attack, to change from a secure state to a reveal state by changing an electrical characteristic of the revealing nanowire (100) to reveal the blinding attack.

IMPROVED METHOD FOR QUANTUM NETWORK-BASED TRANSPORT KEY EXCHANGE WITH CENTRALIZED KEY MANAGER; RELATED COMMUNICATION INFRASTRUCTURE AND COMPUTER PROGRAM PRODUCT

Resumen de: EP4749990A1

Dans ce procédé, un gestionnaire de clés centralisé (40) tient à jour une base de données avec les clés de chacun des nœuds (30_i) du réseau QKD, et, lors de la réception d'une route pour échanger un aléa (K₀) entre un émetteur et un destinataire, sélectionne une clé pour chaque paire de nœuds de la route et transmet, en parallèle à chacun des nœuds de la route, une commande (C_i) identifiant la clé qu'il partage avec le nœud précédent et la clé qu'il partage avec le nœud suivant. Chaque nœud somme (140) les deux clés identifiées et envoie une réponse à l'unité XOR (44), qui construit une chaine globale (K) avant de la transmettre au destinataire pour extraction de l'alea.

TECHNIQUES FOR DISTRIBUTING ENTANGLED PHOTONS AS A SERVICE

Resumen de: EP4749986A1

Techniques for exposing entangled quantum states is disclosed, comprising the following steps:• storing entangled quantum states in a quantum memory at a network node;• storing metadata associated with the quantum states in a classical metadata memory, wherein the metadata includes a physical storage address, a time slot identifier and a logical identifier;• requesting the entangled quantum states from the quantum memory via a classical API;• exposing the entangled quantum states to users of a quantum communication protocol over a quantum communication channel.

QUANTUM KEY MANAGEMENT SYSTEM FOR NETWORK NODE, COMMUNICATION NETWORK, METHOD, COMPUTER PROGRAM

Resumen de: EP4749988A1

Provided is a first network node for communicating with a second network node. The first network node includes circuitry configured to locally generate a first encryption key. The circuitry is further configured to communicate the first encryption key to the second network node via a first communication path. The circuitry is further configured to receive a second encryption key from the second network node via a second communication path. The second communication path involves at least one third network node different from a fourth network node of the first communication path. The circuitry is further configured to communicate encrypted payload data with the second network node. The encryption is based on a combination of the first and second encryption keys.

TECHNIQUES FOR PROVIDING AN ENTANGLEMENT DISTRIBUTION FOR QUANTUM APPLICATIONS IN FORM OF AN ENTANGLEMENT DISTRIBUTION AS A SERVICE (EDAAS)

Resumen de: EP4749998A1

A system for providing an entanglement distribution for quantum applications in form of an Entanglement Distribution as a Service (EDaaS), comprising:A network provider plane configured to manage the generation, distribution, forwarding, and storage of entangled quantum states across a quantum network, the network provider plane comprising:- One or more quantum optical elements especially single photon sources, fiber-optic links, beam splitters, single-photon detectors, and quantum memories for generating and maintaining entangled photonic states;- A quantum link layer providing quantum optical connections to distribute entangled photon states between directly connected network nodes;- A quantum network layer configured for dynamic routing of quantum states across multiple optical paths between network nodes;An Application Programming Interface (EdaaS-API) operable at the service level, said API comprising:- A state retrieval interface configured to provide applications with logical and physical addresses of stored quantum states within the quantum memories;- A Q-Push interface configured to enable the export of selected quantum states, based on physical storage addresses, over a quantum channel by triggering the release of entangled photon states;A software-defined network (SDN) management layer configured to dynamically manage the configuration, monitoring, and routing of entangled states across the quantum network, said SDN management layer comprising:- A service configura

SECURITY PROOF OF QUANTUM COMMUNICATION PROTOCOLS

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.

ML BASED SECURITY PROOF OF QUANTUM COMMUNICATION PROTOCOLS

Resumen de: WO2025093381A1

Disclosed is a method for sharing information using a data sharing system comprising a sender node and a receiver node using a 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 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 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.

METHOD APPARATUS SYSTEM AND COMPUTER PROGRAM FOR MANAGING QUANTUM CRYPTOGRAPHIC COMMUNICAION NETWORK

Resumen de: KR20260075466A

0001a 본 발명은 본 발명은 양자 암호 통신 네트워크 관리 방법, 장치 및 컴퓨터 프로그램에 대한 것으로서, 보다 구체적으로 컴퓨팅 장치를 이용하여 복수의 노드를 구비하는 양자 암호 통신 네트워크를 관리하는 방법에 있어서, 상기 복수의 노드 중 시작 노드와 목적 노드 및 하나 이상의 중계 노드를 포함하는 양자키 중계 경로를 산출하는 단계; 및 상기 산출된 양자키 중계 경로를 이용하여 상기 시작 노드에서 상기 목적 노드로 제1 양자키를 전달하는 단계를 포함하며, 상기 전달하는 단계에서는, 상기 제1 양자키에 대한 제1 유효 기간 정보를 함께 전달하여 상기 시작 노드 또는 상기 목적 노드에서 상기 제1 유효 기간 정보를 기초로 상기 제1 양자키에 대한 관리를 수행하도록 하는 방법을 개시한다.

METHOD AND DEVICE FOR GUARANTEEING AUTHENTICITY OF DIGITAL DATA

Resumen de: EP4518243A1

0001 In the method for guaranteeing authenticity of digital data, data are considered that are digitally signed with a pre-quantum signature and the method comprises the steps of generating a time stamp and digitally signing the pre-quantum signature together with the time stamp using a post-quantumg signature.

CONTINUOUS VARIABLE-QUANTUM KEY DISTRIBUTION SYSTEM AND METHOD

Resumen de: WO2025045383A1

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.

NETWORK NODE AND COMMUNICATION NETWORK

Resumen de: EP4749987A1

0001 Provided is a first network node communicating in a sequence of network nodes in a network. The first network node comprises circuitry configured to generate a first cryptographic context with a second network node in the sequence. The circuitry is further configured to generate a second cryptographic context with a third network node in the sequence. With respect to the first network node, a directly neighboring network node has access to at most one of the first and the second cryptographic contexts.

A RESTRICTED METHOD OF SECURITY KEY EXCHANGE BASED ON A QUANTUM NETWORK HAVING A CENTRALIZED KEY MANAGER; A COMMUNICATION INFRASTRUCTURE AND A COMPUTER PROGRAM PRODUCT THEREFOR

Resumen de: EP4749991A1

0001 Dans ce procédé, un gestionnaire de clés centralisé (40) tient à jour une base de données avec les clés de chacun des nœuds (30) du réseau QKD, et, lors de la réception d'une route pour échanger un aléa (K<0>) entre un émetteur et un destinataire, sélectionne une clé pour chaque paire de nœuds de la route et transmet, en parallèle à chacun des nœuds de la route, une commande (C) identifiant la clé qu'il partage avec le nœud précédent et la clé qu'il partage avec le nœud suivant. Chaque nœud somme (140) les deux clés identifiées et envoie une réponse à l'unité XOR (44), qui construit une chaine globale (K) avant de la transmettre au destinataire pour extraction de l'aléa.