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公开(公告)号：EP4216488A1
公开(公告)日：2023-07-26
申请号：EP22152464.8
申请日：2022-01-20
申请人： Terra Quantum AG
摘要： A method for encrypted messaging in a system is presented, wherein the system comprises a first client device (10), a second client device (11), and a quantum key device (12) comprising a quantum random number generator (12d). The method comprises:
- generating, by the quantum random number generator (i2d), a first quantum random signal;
- generating, by the quantum key device (12), a symmetric first master key from the first quantum random signal;
- transmitting the first master key to the first client device (10), and storing the first master key in an encrypted first client container in the first client device (10);
- generating, by the quantum key device (12) and using the first master key, a first encrypted package by encrypting a first pairing key of a plurality of pairing keys being symmetric and assigned to the first client device (10) and the second client device (11);
- generating, by the quantum key device (12), a second encrypted package by encrypting the first pairing key using a second master key and transmitting the first encrypted package to the first client device (10) and the second encrypted package to the second client device (11);
- providing the first pairing key in the first client device (10) by decrypting the first encrypted package using the first master key and providing the first pairing key in the second client device (11) by decrypting the second encrypted package using the second master key; and
- establishing a first encrypted connection between the first client device (10) and the second client device (11) using the first pairing key.-
公开(公告)号：EP4206800A1
公开(公告)日：2023-07-05
申请号：EP21218377.6
申请日：2021-12-30
申请人： Terra Quantum AG
IPC分类号： G02F1/01
摘要： A waveguide device comprises a substrate comprising an electro-optical material; a waveguide formed in the electro-optical material; and a plurality of electrodes formed in a vicinity of the waveguide. The electro-optical material has a first refractive index. The waveguide comprises a plurality of tracks. The tracks comprise a second refractive index smaller than the first refractive index, are parallel to each other with a common direction defining a direction of the waveguide, and form an arrangement in a plane perpendicular to the direction of the waveguide. The arrangement comprises at least 40 equilateral triangles of identical side lengths, wherein all three corners of each of the equilateral triangles each coincide with a different track of the plurality of tracks in the plane perpendicular to the direction of the waveguide.
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公开(公告)号：EP4369650A1
公开(公告)日：2024-05-15
申请号：EP23165719.8
申请日：2023-03-30
申请人： Terra Quantum AG
发明人： Vyatkin, Mikhail , Zhdanova, Ekaterina , Gutor, Alexander , Lesovik, Gordey , Kirsanov, Nikita , Yarovikov, Mikhail , Smirnov, Alexander , Bezruchenko, Alexander
IPC分类号： H04L9/08 , H04B10/2507 , H04B10/25 , H04B10/29
CPC分类号： H04L9/0855 , H04B10/2507 , H04B10/2589 , H04B10/29
摘要： The present disclosure refers to a method for optical signal amplification, the method being implementable in a system which comprises: a transmission line (10) for transmitting optical signals between a first data processing device (11) and a second data processing device (12); and an optical amplifier (14) disposed at the transmission line (10), the optical amplifier (14) comprising an active fiber section (15) and a pumping device (16). The method comprises: determining a target operating gain of the optical amplifier (14); determining a target maximum gain of the optical amplifier (14); determining an active fiber section length such that the optical signals are amplified with at most the target maximum gain; determining a core cross-sectional area size of the active fiber section (15) based on a maximum allowable pulse shape distortion and a target maximum energy per pulse such that high-energy pulses with the target maximum energy per pulse are distorted by at most the maximum allowable pulse shape distortion; and determining an operating pumping power of the pumping device (16) below the maximum pumping power such that the optical signals are amplified with the target operating gain. Further, a system for optical signal amplification is disclosed.
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公开(公告)号：EP4047861A1
公开(公告)日：2022-08-24
申请号：EP21168449.3
申请日：2021-04-14
申请人： Terra Quantum AG
发明人： Lesovik, Gordey , Kronberg, Dmitry , Kudukhov, Alexey , Pastushenko, Valeria , Kenbaev, Nurbolat , Kirsanov, Nikita , Sekatski, Pavel , Vinokur, Valerii , Sagingalieva, Asel
IPC分类号： H04L9/08
摘要： A method for quantum key distribution is implementable in a system with a plurality of data processing devices (10, 11). The method comprises: determining, in at least one of a first data processing device (10) and a second data processing device (11), an intrinsic loss along a quantum channel (13) between the first data processing device (10) and the second data processing device (11); generating, in the first data processing device (10), a first signal; generating, in the first data processing device (10), a pulse sequence comprising at least one test pulse and signal pulses generated from the first signal; transmitting the pulse sequence from the first data processing device (10) via the quantum channel (13) to the second data processing device (11); receiving the pulse sequence in the second data processing device (11), and determining, in the second data processing device (11), a second signal from the pulse sequence; determining invalid signal positions and providing the invalid signal positions in the first data processing device (10) and the second data processing device (11); determining, in the first data processing device (10), a first reconciled signal from the first signal and the invalid signal positions, and determining, in the second data processing device (11), a second reconciled signal from the second signal and the invalid signal positions; determining a total loss along the quantum channel (13) from the at least one test pulse received in the second data processing device (11), determining a signal loss from the total loss and the intrinsic loss, and providing the signal loss in the first and the second data processing device (10, 11); determining a shared key in the first and the second data processing device (10,11) by error correcting the first reconciled signal in the first data processing device (10) and error correcting the second reconciled signal in the second data processing device (11); and determining an amplified key in the first and the second data processing device (10, 11) from the shared key by shortening the shared key by a shortening amount that is determined from the signal loss.
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公开(公告)号：EP4047860A1
公开(公告)日：2022-08-24
申请号：EP21166427.1
申请日：2021-03-31
申请人： Terra Quantum AG
发明人： Kirsanov, Nikita , Kenbaev, Nurbolat , Kronberg, Dmitry , Vinokur, Valerii , Lesovik, Gordey , Sekatski, Pavel , Sagingalieva, Asel
IPC分类号： H04L9/08
摘要： A method is provided for determining a secret cryptographic key shared between a sending unit (1) and a receiving unit (2) by using a communication channel (3) comprising spatially separated amplifiers (4) for secure long-distance communication. The method comprises transmitting a sequence of electromagnetic pulses (6) via the communication channel (3) through the amplifiers (4) for establishing a shared secret cryptographic key, wherein each electromagnetic pulse corresponds to a bit of a random bit sequence according to a ciphering protocol, and at least one ciphering parameter is determined by maximizing the expected key generation rate using an information theory model, wherein a measured signal loss and at least one amplification parameter are taken into account as input parameters to the information theory model.
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6.发明公开
公开(公告)号：EP4117223A1
公开(公告)日：2023-01-11
申请号：EP21183810.7
申请日：2021-07-05
申请人： Terra Quantum AG
摘要： A method for determining a cryptographic key is carried out in a data processing system (20), and comprises: providing a plaintext and a ciphertext determined from the plaintext using a cryptographic key and a cryptographic procedure which comprises cryptographic operations; for each cryptographic operation of the cryptographic procedure, providing at least one intermediate relation which comprises an intermediate equation and/or an intermediate inequality; determining an optimization problem comprising: the plaintext and the ciphertext; at least one optimization expression assigned to a round of the cryptographic procedure; and optimization variables comprising state variables of the cryptographic procedure and a cryptographic key variable; wherein the at least one optimization expression is determined from the at least one intermediate relation and comprises at least one preceding state variable assigned to a preceding round. The method further comprises: solving the optimization problem and determining the cryptographic key from an optimizing value of the cryptographic key variable.
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7.发明公开
公开(公告)号：EP3982589A1
公开(公告)日：2022-04-13
申请号：EP20200370.3
申请日：2020-10-06
申请人： Terra Quantum AG
IPC分类号： H04L9/08
摘要： The disclosure relates to a method for determining a secret cryptographic key shared between a sending unit (1) and a receiving unit (2) for secure communication. The method comprises obtaining, by the sending unit, a random bit sequence, and transmitting, at the sending unit (1), a first sequence of electromagnetic pulses (1.1) to the receiving unit (2) via a communication channel (3). Thereby, each electromagnetic pulse of the first sequence of electromagnetic pulses (1.1) corresponds to a bit of the random bit sequence according to a ciphering protocol. The method further comprises determining a signal loss in the communication channel (3) caused by an eavesdropper (4), and estimating an information advantage over the eavesdropper (4) based on the determined signal loss. The method further comprises performing privacy amplification based on the estimated information advantage in order to establish a shared secret cryptographic key.
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公开(公告)号：EP3974858A1
公开(公告)日：2022-03-30
申请号：EP20199026.4
申请日：2020-09-29
申请人： Terra Quantum AG
IPC分类号： G01R33/46 , G01R33/44 , G01N24/08 , G01R33/465
摘要： The invention relates to a method of determining a nuclear magnetic resonance relaxation time of a probe (P). The method comprises a first step (S1) of polarizing first nuclei (H) and second nuclei (N) by applying a longitudinal static magnetic field (B 0 ) to the probe (P), a second step (S2) of exchanging the polarizations of the first nuclei (H) and the second nuclei (N) by irradiating a swap sequence (SWAP) of transverse magnetic field pulses, a third step (S3) of transversely magnetizing the second nuclei (N) by irradiating at least one excitation pulse (EXC) and measuring the resulting magnetization signal (FID) of the second nuclei (N), and a fourth step (S4) of determining the nuclear magnetic resonance relaxation time of the second nuclei (N) based on the measured magnetization signal (FID) of the second nuclei (N).
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公开(公告)号：EP4369649A1
公开(公告)日：2024-05-15
申请号：EP22206735.7
申请日：2022-11-10
申请人： Terra Quantum AG
发明人： Vyatkin, Mikhail , Gutor, Alexander , Kirsanov, Nikita , Zhdanova, Ekaterina , Yarovikov, Mikhail , Smirnov, Alexander , Bezruchenko, Alexander , Lesovik, Gordey
IPC分类号： H04L9/08
CPC分类号： H04L9/0855 , H04B10/2507 , H04B10/2589 , H04B10/29
摘要： The present disclosure refers to a method for quantum key distribution, the method being implementable in a system which comprises: a transmission line (10) for transmitting optical signals between a first data processing device (11) and a second data processing device (12) and an optical amplifier (14) disposed at the transmission line (10), the optical amplifier (14) comprising an active fiber section (15) and a pumping device (16), the method comprising: determining a ratio between a target maximum gain and a target operating gain of the optical amplifier (14); determining an active fiber section length such that the optical signals with a target maximum signal power are amplified with at most the target maximum gain; determining an operating pumping power of the pumping device (16) below the maximum pumping power such that the optical signals are amplified with a target operating gain according to the determined ratio between the target maximum gain and the target operating gain; and determining a shared key between the first data processing device (10) and the second data processing device (11) by quantum key distribution comprising amplifying the optical signals via the optical amplifier (14) by operating the pumping device (16) at the operating pumping power.
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公开(公告)号：EP4261735A1
公开(公告)日：2023-10-18
申请号：EP22167932.7
申请日：2022-04-12
申请人： Terra Quantum AG
发明人： Lesovik, Gordey , Marchenko, Artemiy , Vinokour, Valerii , Malinovskii, Vladimir , Khoruzhii, Kirill , Ignatov, Fedor , Matrenok, Semen , Kirakosyan, Davit , Terentev, Vladimir
IPC分类号： G06F40/35 , G06F7/58 , G06N10/00 , G06F40/216 , G06F40/232 , G06F40/253 , G06F40/289 , G06F40/295
摘要： A method for natural language processing comprises: receiving a sample comprising natural language; processing the sample, wherein processing the sample comprises generating a plurality of response hypotheses and generating a plurality of confidence values, wherein each response hypothesis is associated with the corresponding confidence value; and selecting a response, comprising selecting the response randomly among the plurality of response hypotheses based at least in part on the corresponding confidence value by means of a quantum random number generator.
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