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174
results.
Updated on
15/09/2026 [09:23:00]
Results 100 to 125 of 174
Absstract of: US20260205207A1
The present disclosure provides a method of performing user authentication in a quantum communication system. More specifically, the method includes transmitting an information sequence including at least one data block on the quantum channel, wherein based on a preshared key and at least one key generated based on the preshared key, a checking sequence for a quantum bit error rate (QBER) estimation is determined from each of the at least one data block, wherein the preshared key is used to select a location of a sequence included in the at least one data block; performing the user authentication based on a portion of the checking sequence; and performing a QBER estimation based on a result of the user authentication and a remaining checking sequence excluding the portion of the checking sequence. A user authentication error rate and a QBER estimation error rate are used for the QBER estimation.
Absstract of: CN119519969A
The invention provides a preparation method, a quantum random number security chip and a quantum key generation method, and mainly relates to the technical field of quantum random number generation. The preparation method comprises the steps that a three-dimensional stacking structure is adopted, a quantum entropy source chip bare chip and a safety processing module are arranged on the first surface of a substrate and the second surface of the substrate respectively, and a plurality of copper columns are arranged on the second surface of the substrate; performing plastic packaging on the first surface of the substrate and the second surface of the substrate by adopting a plastic packaging process to obtain a plastic packaging structure wrapping the substrate; and redirecting a substrate bonding pad configured on the second surface of the substrate to a fan-out area of the substrate by using a wafer fan-out mode, and taking the salient points of the plurality of copper columns exposed outside the plastic package structure as external pins of the quantum random number security chip to obtain the quantum random number security chip.
Absstract of: US20260205302A1
Every major DAO governance failure traces to a common root cause: governance logic, voting, and treasury access reside in software that adversaries can reach. The disclosed invention provides a hardware-anchored DAO governance architecture defeating five adversary classes. A supply-chain attestation layer verifies firmware integrity against a public transparency log at node initialization. A Silicon Root-of-Trust Anchor Layer binds governance to processor-embedded cryptographic keys. A Heterogeneous TEE Orchestration Layer enforces Byzantine fault-tolerant canonical quorum through threshold BLS signatures across independent hardware architecture families. An Atomic Governance Transition Engine executes indivisible state changes: record incorporation, key destruction, counter advancement, and IOMMU treasury isolation. A Quantum-Resistant Governance Key Lifecycle Engine performs CRYSTALS-Kyber (ML-KEM, FIPS 203) key rotation with cryptographic agility. A Cross-Chain Governance Attestation Bridge publishes TEE-signed proofs to multiple blockchains. A Deterministic Governance Replay Engine reconstructs governance decisions in isolated sandboxes. An Automated Governance Incident Response Engine and Governance Regulator Verification Network provide hardware-enforced, independently auditable compliance enforcement.
Absstract of: US20260205492A1
A measures output method is to be executed by a computer. The measures output method includes: obtaining respective importance levels of a plurality of partitions for separating a plurality of functional sections to be mounted on a vehicle, the plurality of functional sections including a first partition to which a first functional section at a source belongs, and a second partition to which a second functional section at a destination belongs; determining a security measure for a communication from the first functional section to the second functional section based on a first importance level of the first partition and a second importance level of the second partition; and outputting information on the security measure determined.
Absstract of: WO2026151451A2
A system for implementing a quantum key distribution network, the system comprising: one or more quantum transmitters configured to transmit quantum encoded photons; a single state receiver, configured to receive the photons and determine encoded bits under a first protocol; a bell state receiver configured to receive quantum encoded photons under a second protocol; and a manager configured to determine a basis of encoding of the quantum encoded photons and to control communication between the one or more quantum transmitters and the single state receiver based on the first protocol or the bell state receiver based on the second protocol.
Absstract of: DE102025101067A1
Die vorliegende Offenbarung betrifft ein Verfahren und ein System zur Simulation eines Quantenkommunikationsvorgangs. Das Verfahren weist folgende Schritte auf: Bereitstellen, in einer Datenverarbeitungseinheit (10), von Quantenkommunikationsinformationen für mindestens einen zu simulierenden Quantenkommunikationsvorgang zwischen mindestens einer ersten Quantenkommunikationsvorrichtung (30), einer zweiten Quantenkommunikationsvorrichtung (31) und einer Abhörvorrichtung (33) über mindestens einen Quantenkanal (32); Bestimmen, in der Datenverarbeitungseinheit (10) und aus den Quantenkommunikationsinformationen, von Steuerungsdaten für einen Quantenprozessor (14), in dem Quantenoperationen auf Quantenteilchen angewendet werden, die Ionen oder neutrale Atome sind und die innerhalb mehrerer Operationsbereiche (21) räumlich kontrollierbar sind; und Simulieren des Quantenkommunikationsvorgangs in dem Quantenprozessor (14) mittels der Steuerungsdaten. Hierbei ist einem Quantenbit des Quantenkommunikationsvorgangs jeweils eines der Quantenteilchen zugeordnet. Kommunikationsoperationen des Quantenkommunikationsvorgangs entsprechen jeweils mindestens einer der Quantenoperationen, wobei die Quantenoperationen mindestens eine erste Quantenoperation für die erste Quantenkommunikationsvorrichtung (30), mindestens eine zweite Quantenoperation für die zweite Quantenkommunikationsvorrichtung (31) und mindestens eine dritte Quantenoperation für die Abhörvorrichtung (33) umfassen. Des W
Absstract of: WO2025052024A1
The invention relates to a quantum-mechanical encryption key stretching method. The method comprising encoding an input key into a set of quantum mechanical states, scrambling the encoded quantum mechanical states into a larger number of quantum mechanical states and deriving an enhanced encryption key from the larger number of5 quantum mechanical states. The invention also includes methods of encrypting and decrypting data using the enhanced encryption key and method of deriving the enhanced key. A further aspect of the invention relates to a method for encrypting data by encoding the data in a set of quantum mechanical states and performing a scrambling operation on those quantum mechanical states.
Absstract of: 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.
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: 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.
Absstract of: 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.
Absstract of: 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.
Absstract of: 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.
Absstract of: 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.
Absstract of: 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.
Absstract of: 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.
Absstract of: 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.
Absstract of: 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'.
Absstract of: 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.
Absstract of: 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.
Absstract of: 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.
Absstract of: 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.
Absstract of: 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.
Absstract of: 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.
Nº publicación: US20260189373A1 02/07/2026
Applicant:
ARQIT LTD [GB]
Arqit Limited
Absstract of: 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.
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