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184
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Updated on
15/07/2026 [08:24:00]
Results 100 to 125 of 184
Absstract of: US20260128870A1
A system for transmitting an encrypted message via a quantum channel and a related method is described which uses a quantum key sharing algorithm designed to enable proper (secure and fast) communication between a transmitting station (not shown) and a receiving station (not shown).
Absstract of: KR20260064426A
0001a 본 개시는 무선 통신 시스템에 관한 것으로서, 보다 구체적으로는 양자 보안에 기반하여 선택적으로 네트워크 슬라이스 식별자를 보호하는 방법 및 장치에 관한 것이다. 구체적으로, 본 개시는 네트워크 슬라이스 식별자가 상기 네트워크 슬라이스 식별자에 대해 PQC(Post Quantum Cryptography) 기반 암호화가 수행됨을 지시하는 제1 정보를 포함하는지 여부를 식별하는 단계; 상기 네트워크 슬라이스 식별자가 상기 제1 정보를 포함하는 경우, 상기 네트워크 슬라이스 식별자에 대해 상기 PQC 기반 암호화를 수행하여 보호된 네트워크 슬라이스 식별자를 획득하는 단계; 및 상기 보호된 네트워크 슬라이스 식별자를 포함하는 메시지를 네트워크 엔티티로 전송하는 단계를 포함하는 방법 및 이를 위한 장치에 관한 것이다. 본 개시에 따르면, 네트워크 슬라이스 식별자를 양자 컴퓨터를 이용한 공격으로부터 효과적으로 보호할 수 있다.
Absstract of: US20260128868A1
0000 The technology described herein enhances the security of non-terrestrial network links by integrating quantum key distribution into an optically transparent metasurface transcoder node with hardware-based polarization control. The metasurface, composed of unit cells of metal-insulator transition material (such as vanadium dioxide, vanadium trioxide, or vanadium pentoxide) leverages the dynamic tunability of the metal-insulator transition material to manipulate the polarization and phase of photons, as needed for quantum key distribution protocols. Hardware level integration ensures secure key distribution with minimal signal loss, enhancing the robustness and security of satellite-terrestrial communication. The system dynamically adjusts to environmental conditions, optimizing performance and ensuring high fidelity in quantum key exchange, thereby providing a robust solution for secure communication in non-terrestrial networks. The transcoder's use of quantum key distribution allows for real-time detection of eavesdropping attempts, as interception of the quantum key exchange alters the photons'quantum states, alerting the system to potential security breaches.
Absstract of: US20260128867A1
Systems and techniques may generally be adapted for establishing secure communications with use of quantum entanglement, including via the use of mesh networks and multiple satellite communication locations. An example technique may include generating a stream of quantum entangled particles, and transmitting at least part of the stream of the quantum entangled particles to at least a first node, a second node, and an intermediate node connected via a satellite communication network. In this context, the intermediate node is located between the first node and the second node, and a secure trusted mesh of entities can be established among the first, second, and intermediate nodes. The stream of the quantum entangled particles can used to derive a quantum entangled value, such as for use with a cryptographic protocol of secure communications between the first node and the second node via the satellite communication network.
Absstract of: US20260128872A1
A system includes a quantum memory configured to store sensitive data to be transmitted to a quantum computing device over an optical communication channel and a quantum processor operably coupled to the quantum memory and configured to generate pairs of entangled quantum bits (QuBits), and further encode each pair of the pairs of entangled QuBits based on the sensitive data. The pairs of entangled QuBits include the sensitive data. The quantum processor is further configured to store the pairs of entangled QuBits to a predetermined quantum storage medium configured to maintain a state of each pair of the pairs of entangled QuBits, identify, based on a change in state associated with one Qubit of a pair of the pairs of entangled QuBits, an unauthorized measurement of the pairs of entangled QuBits, and in response to identifying the unauthorized measurement, cause the pairs of entangled QuBits to be rendered unreadable.
Absstract of: WO2026091926A1
The present application relates to the technical field of quantum communications, and in particular, to a quantum receiving apparatus and method, and a laser terminal, which are used for reducing deployment cost of a telescope, and reducing response speed and time jitter of a detection module while improving a code rate of quantum key distribution. The quantum receiving apparatus comprises: a receiving array composed of multiple telescopes, used to receive quantum light emitted by a quantum transmitting apparatus by means of a quantum channel; a detection array composed of multiple detection modules, the multiple detection modules being corresponding one-to-one with the multiple telescopes, each detection module being used to detect a light beam output by a corresponding telescope; and a detection selection module, separately connected to the multiple detection modules, and used to select a target detection module from the multiple detection modules on the basis of a detection result of the multiple detection modules, and determine an output result on the basis of the detection result of the target detection module.
Absstract of: KR20260061805A
0001a 카메라 영상 저장 관리 장치 및 방법이 개시된다. 본 발명의 일실시예에 따른 카메라 영상 저장 관리 장치는 카메라 단말이 촬영하여 암호화된 영상 파일을 수신하는 카메라 영상 관리부 및 상기 암호화된 영상 파일을 분산 파일 식별자가 할당된 분산 파일 조각으로 파편화하고, 파편화된 분산 파일 조각을 복수의 데이터 저장 노드에 분산 저장하는 카메라 영상 저장부를 포함한다.
Absstract of: KR20260059993A
0001a AI 기반 동적 청킹 및 하이브리드 암호화를 통한 안전한 대용량 데이터 변환 방법 및 그 시스템이 개시된다. 입력 데이터의 패턴을 분석하여 패턴 분석 결과와 시스템 상태를 기초로 상기 입력 데이터에 대한 청킹 최적화를 수행하고, 블록체인 네트워크를 통해 상기 입력 데이터와 관련된 데이터 처리 과정과 접근 로그를 기록하여 관리하고, 하이브리드 암호화를 통해 상기 입력 데이터에 대해 다층적 데이터 보안을 제공할 수 있다.
Absstract of: US20260119944A1
A quantum communication system and associated methods are described for securely establishing a cryptographic key between multiple transmitters and a receiver. Each transmitter emits qubit signals from a light source within defined time windows, characterized by specific bases and modes controlled by a transmitter controller. The receiver utilizes an interference device with multiple inputs to receive qubit signals and outputs to generate an interference signal, which is detected by multiple detectors. A receiver controller sends information on detected outputs to transmitters and provides feedback based on temporal characteristics. Simultaneously, the system adjusts subsequent qubit signal characteristics based on this temporal feedback, enabling the establishment of a cryptographic key between transmitters using the detected signals. This adjustment optimizes the cryptographic key rate, enhancing security and efficiency in quantum communication protocols.
Absstract of: DE102024131529A1
Die Erfindung betrifft eine Lösung zur Sicherstellung einer vertrauenswürdigen Kommunikation zwischen zwei Kommunikationspartnern, welche beim Austausch von Nutzdaten als Sender „Alice“ und Empfänger „Bob“ mittels je eines Kommunikationsmoduls (1, 2) durch einen optischen Kommunikationskanal (4) miteinander verbunden sind, wobei es „Bob“ ermöglicht ist zu überprüfen, ob die empfangenen Nutzdaten bei ihrer Übertragung unverändert geblieben sind. Dazu wird ein zur Übertragung der Nutzdaten verwendetes klassisches optisches Trägersignal vor einer Modulation mit Nutzdaten unter Erzeugung eines quantenklassischen Signals mit dem photonischen Signal eines eine Verschränkungsbeziehung vermittelnden verschränkten gequetschten Quantenzustands überlagert. Das empfangene modulierte quantenklassische Signal wird in dem Kommunikationsmodul (2), nach einer Überlagerung mit einem, von einem lokalen Oszillator (10) erzeugten Laserstrahl, einer homodynen Messung unterzogen und das Ergebnis durch Vergleich mit dem Ergebnis einer homodynen Messung an dem lokal bei dem Kommunikationsmodul (2) vorliegenden, verschränkten gequetschten Quantenzustand darauf überprüft wird, ob eine ursprünglich zwischen den Erwartungswerten der verschränkten gequetschten Quantenzustände bestehende Korrelation bei der Datenübertragung erhalten geblieben ist.
Absstract of: US20260121842A1
Disclosed is a multi-entangled photon source-based multi-level user quantum key distribution network and distribution method. Bandwidth requirements can be effectively dispersed by introducing a plurality of entangled photon sources, enabling a quantum entanglement-based quantum secure communication network supporting a plurality of users to be possible. When arranging the second-level photon source, problems of transmission loss and quantum key rate decline caused by an excessively long distance between users in a same user group and a central entangled photon source can be effectively alleviated. Under a multi-user hierarchical framework, the pressure of the central photon source has been further reduced, which provides the possibility for building an entanglement-based secure communication network with more users and a wider range.
Absstract of: 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).
Absstract of: US20260121829A1
0000 A confidential information processing system conforming to a quantum homomorphic cryptographic technique that satisfies strong circuit confidentiality includes an encryption device (400). The encryption device (400) includes an encryption unit (404) that generates a first ciphertext by encrypting a first plaintext, using a first public parameter and a first encryption key, and generates a second ciphertext by encrypting a second plaintext, using a second public parameter and a second encryption key. Each of the first public parameter and the second public parameter is a parameter generated using a security parameter. The first encryption key is an encryption key generated using the first public parameter and a first decryption key which is a decryption key generated using the security parameter. The second encryption key is an encryption key generated using the second public parameter and a second decryption key which is a decryption key generated using the security parameter.
Absstract of: US20260121834A1
Devices, systems, and methods for secure modular addition and subtraction are provided. A modular adder and subtractor circuit with masking circuit includes an arithmetic to Boolean (A2B) conversion operator configured to convert (i) a second sum and (ii) a value determined based on a first sum, to Boolean resulting in first and second Boolean values, a shifter configured to (i) make a most significant bit of the first Boolean value a least significant bit resulting in a shifted first Boolean value and (ii) make the most significant bit of the second Boolean value a least significant bit resulting in a shifted second Boolean value, and a Boolean to arithmetic (B2A) conversion operator, configured to convert a representation of the shifted first Boolean value and a representation of the shifted second Boolean value to arithmetic representation resulting in first and second arithmetic values, respectively.
Absstract of: US20260121853A1
A system includes a memory configured to store a post quantum cryptography (PQC) key and sensitive data to be transmitted to a computing device over a communication channel and a processor operably coupled to the memory and configured to access the PQC key and the sensitive data. The processor is further configured to determine, based at least in part on the sensitive data, an expiration time beyond which the sensitive data is rendered unreadable. The expiration time is identified based on an estimated future time at which a quantum computing based decryption process can be utilized to read the sensitive data. The processor is further configured to encode the sensitive data based on the PQC key. The PQC key is associated with the expiration time. The processor is further configured to transmit, over the communication channel, the encoded sensitive data to the computing device.
Absstract of: US20260121844A1
0000 It is an object of the present disclosure to appropriately perform quantum key distribution through an optical wavelength division multiplexing link. There is provided a communication apparatus that communicates an optical signal based on an electrical signal obtained by multiplexing a first control signal addressed to a second optical communication apparatus from a first optical communication apparatus and a control signal for reception signal processing from a first quantum key distribution apparatus to a second quantum key distribution apparatus.
Absstract of: US20260121840A1
0000 Described herein are methods, systems, and computer-readable storage media for using a network identity. Techniques may include encrypting a first data element and storing the encrypted first data element mapped to a network identity. Techniques may further include receiving a request from the network identity to perform an action on a resource, dynamically determining a second data element, decrypting the first data element using the second data element, and performing the action on the resource using the first data element.
Absstract of: US20260121841A1
Systems and methods for high-performance quantum-safe key management are disclosed. A method may include: (1) receiving, by a client service router, a client request for an operation involving a key from a client computer program; (2) authenticating, by the client service router and using a credentials operations service, the client request; (3) verifying, by the client service router and using a credentials operating service, permission for the client request; (4) routing, by the client service router, the request to a cryptoprocessor, wherein the cryptoprocessor is configured to execute the operation; (5) receiving, by the client service router, a result of the execution of the operation from the cryptoprocessor; and (6) returning, by the client service router, the result to the client computer program.
Absstract of: US20260121826A1
A computing system obtains a set of instructions configured to execute on a classical computing system. The set of instructions are evaluated to identify a cryptographic algorithm having a cryptographic algorithm type implemented by the set of instructions. Based on the cryptographic algorithm type, a candidate quantum algorithm comprising quantum instructions operable to attempt to breach the cryptographic algorithm is selected from a plurality of quantum algorithms. The set of instructions are translated into cryptographic quantum instructions that implement the cryptographic algorithm. Based on the cryptographic quantum instructions and the quantum instructions, a quantum instruction file is generated that, when executed, attempts to breach the cryptographic algorithm.
Absstract of: WO2026087623A1
The method can include preparing a quantum state ρ A in a system qubit A; preparing n pairs of ancillary qubits {Si,Ni}, each pair of ancillary qubits including a signal qubit Si, and a noise qubit Ni, wherein the signal qubit Si and noise qubit Ni of each pair of ancillary qubits is prepared in a maximally entangled (Bell) state |Φ〉 SiNi ; and applying an encoding operation (I) to the system qubit A and the signal qubits {Si}, including entangling the system qubit A with the signal qubits, turning the signal qubits {Si} into noisy copies of the quantum state ρ A .
Absstract of: US20260121857A1
A quantum-authenticated digital token generation system comprises a classical computing device with parameter calculation and verification modules, and a quantum computing device with control devices, connected via an exchange interface. The system enforces quantum mechanical speed limits by calculating minimum evolution times based on energy uncertainty from quantum hardware characteristics. Quantum hardware execution is verified through quantum state overlap analysis, entropy measurements, and noise signature verification. The system implements quantum hardware fingerprinting using device-specific calibration data including qubit frequencies and decoherence times. Echo revival protocols employ time-reversed quantum circuits to verify quantum coherence maintenance, distinguishing genuine quantum operations from classical simulation. Multi-modal verification combines quantum mechanical constraints, hardware attestation, and cryptographic commitments with temporal anti-precomputation mechanisms. The system integrates with blockchain networks through transaction assembly modules, providing quantum-enhanced security for digital tokens.
Absstract of: KR20260058393A
0001a 양자 키 분배를 위한 편광 신호 송신 장치 및 방법을 개시한다. 본 개시의 일 실시예에 따른 송신 장치는 평판형 광도파로 및 수동 소자를 이용함으로써 레이저 광원의 동작 제어만으로 안정적인 편광 정보를 생성하여 송신할 수 있다. 본 개시의 실시예에 따른 송신 장치를 이용하여 양자키분배 시스템의 소형화 및 집적화가 용이하다.
Absstract of: EP4734434A1
0001 A method for quantum key distribution is provided, the method being carried out in a first data processing device (11) having means for preparing and transmitting quantum states, the method comprising: providing at least one secret index information key; generating a quantum signal indicative of a first initial string and transmitting the quantum signal to a second data processing device (12) via a quantum channel (10); determining, by reconciling measurement information between the first data processing device (11) and the second data processing device (12), a first reconciled string from a reconciliation subset of the first initial string; determining an error estimate from an error estimate subset of the first reconciled string; determining a shared string from an error correction subset of the first reconciled string by performing error correction on the first reconciled string; and determining, by privacy amplification, a shared key from a privacy amplification subset of the shared string, wherein the order of elements within at least one of the first initial string, the first reconciled string, the shared string, the reconciliation subset, the error estimate subset, the error correction subset, and the privacy amplification subset is scrambled using the at least one index information key before transmission to the second data processing device (12). Further methods, data processing devices, and a system for quantum key distribution are disclosed.
Absstract of: EP4734435A1
0001 Method of channel noise estimation for a continuous variable quantum communication channel, the method comprising in a receiver device (400) receiving a signal through a public transmission media (200) and processing a recovered quantum signal using channel parameter estimation (Eq6), evaluating an amount of excess noise. A controlled amplitude modulation (401) is performed in the receiver device (400), to form said recovered quantum signal from the signal received through the public transmission media (200) by the receiver device (400), the method comprising evaluating, using the controlled amplitude modulation (401) a subamount of said amount of excess noise dependent from the channel (QC).
Nº publicación: EP4734449A1 29/04/2026
Applicant:
ICTK CO LTD [KR]
ICTK Co., Ltd.
Absstract of: EP4734449A1
An embodiment discloses a virtual private network system that includes: a user device including a physical unclonable function (PUF)-based authentication device; and a server configured to establish an encrypted tunnel using WireGuard protocol with the user device mutually authenticated by the PUF-based authentication method.
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