-
公开(公告)号：US20200313845A1
公开(公告)日：2020-10-01
申请号：US16089304
申请日：2017-03-28
Applicant: INSTITUT MINES-TELECOM
Inventor： Olivier RIOUL , Sylvain GUILLEY
Abstract: A secret key estimation device is provided for determining an estimate of at least one secret key used during a number of executions of a cryptographic function used by at least one cryptographic algorithm. The number of executions of the cryptographic function is at least equal to two. The secret key estimation device comprises an analysis unit for determining a plurality of sets of leakage traces from a side-channel information acquired during the number of executions of the cryptographic function. Each set of leakage traces corresponds to an execution of the cryptographic function and comprising at least one leakage trace. The secret key estimation device further comprises a processing unit configured to determine a statistical distribution of the acquired plurality of sets of leakage traces. The statistical distribution is dependent on a leakage function, the leakage function being represented in a basis of functions by a set of real values. The secret key estimation device is configured to determine the secret key from the statistical distribution of the plurality of sets of leakage traces using an estimation algorithm according to the maximization of a performance metric.
-
112.发明授权公开(公告)号：US10439808B2
公开(公告)日：2019-10-08
申请号：US15532953
申请日：2016-01-08
Applicant: INSTITUT MINES-TELECOM
Inventor： Romain Alleaume
Abstract: A method of communicating a classical message M between a first party A and a second distant party B over a public channel F, comprises the steps of sharing a key between the parties, the shared key K comprising a short-term-secure key KS and/or a long-term-secure key KL; at A, encoding M as a quantum codeword, A using K to encode M into a first encrypted codeword belonging to a publicly known quantum code; communicating the first encrypted codeword from A to B over F whose output is a second codeword; unitarily transforming the second codeword into a third codeword by using a N-mode interferometer controlled by B, placed at the output of F and keyed by K; determining an estimate of M, at B, by performing a measurement on the third codeword and by processing the measurement using K.
-
113.发明授权公开(公告)号：US10425431B2
公开(公告)日：2019-09-24
申请号：US15516577
申请日：2015-09-30
Applicant: B<>COM , Universite de Bretagne Occidentale , Institut Mines Telecom
Inventor： David Espes , Nora Cuppens
Abstract: A method for processing an intrusion in a communication network including a plurality of node equipment, including a current node, which: discovers of a neighborhood of the current node, including assigning a resilience group to the neighboring node, according to at least one piece of information representative of a resilience level of the neighboring node to at least one type of attack; detecting an intrusion affecting at least one suspect node of the neighborhood of the current node; establishing a consensus concerning the at least one suspect node in a neighborhood by counting a number of resilience groups having detected the intrusion in the neighborhood of the suspect node and a total number of resilience groups represented in the neighborhood of the suspect node; and deciding to change a status of the suspect node based on a result of the consensus by comparison of both numbers.
-
114.发明授权公开(公告)号：US10425162B2
公开(公告)日：2019-09-24
申请号：US15651273
申请日：2017-07-17
Applicant: INSTITUT MINES-TELECOM
Inventor： Ghaya Rekaya Ben-Othman , Yves Jaouen , El-Mehdi Amhoud
Abstract: Embodiments of the invention provides a deterministic scrambler (1) arranged in a multimode optical fiber (130) for scrambling light, the light comprising a set of optical signals propagated in said multimode optical fiber according to a set of propagation modes, each propagation mode being associated with a power value, wherein the scrambler is configured to determine a permutation of said propagation modes depending on the power values associated with said propagation modes, the scrambler being configured to redistribute the optical signals according to said permutation of the propagation modes.
-
公开(公告)号：US10419474B2
公开(公告)日：2019-09-17
申请号：US15526790
申请日：2015-11-10
Applicant: INSTITUT MINES-TELECOM/TELECOM SUDPARIS
Inventor： Gustavo Gonzalez Granadillo , Hervé Debar
IPC: H04L29/06
Abstract: A method of selecting, for at least one service of an information system and depending service(s), at least one countermeasure to be implemented against at least one cyber attack, the method includes: identifying elements of the service exposed to the cyber attack(s), calculating a risk mitigation level of each countermeasure with respect to the cyber attack(s), ranking the countermeasure(s) on the basis of a parameter which is at least a function of the risk mitigation level, simulating the impact of the countermeasure(s) on the service and the depending service(s), the countermeasure to be implemented being selected at least as a function of result of the simulation.
-
Patent Agency Ranking
116.发明授权公开(公告)号：US10326971B2
公开(公告)日：2019-06-18
申请号：US16063441
申请日：2016-12-09
Applicant: B<>COM , UNIVERSITE RENNES 1 , INSTITUT MINES TELECOM
Inventor： Cambodge Bist , Remi Cozot , Gerard Madec
Abstract: A method for processing a digital image for rendering on a display. The image includes image elements associated with color information represented in a colorimetric space having a luminance and chrominance components. The luminance component has a value in a first predetermined interval. The display can render values of luminance components included in a second predetermined interval, of greater length than the first interval. The method includes: determining information representative of image brightness perceived by an observer, based on the values of the first luminance component; calculating an expansion exponent as a function of the determined brightness information; transforming the first luminance components into second luminance components, including calculating an intermediate luminance value by applying the calculated expansion exponent to the first luminance component value and multiplying the intermediate value by the length of the second interval. The expansion exponent is a decreasing function of the determined brightness information.
-
公开(公告)号：US10284276B2
公开(公告)日：2019-05-07
申请号：US15390057
申请日：2016-12-23
Applicant: INSTITUT MINES-TELECOM
Inventor： Mohamed-Achraf Khsiba , Ghaya Rekaya Ben-Othman , Asma Mejri
IPC: H04B7/08 , H04B7/0413 , H04L25/03 , H04L1/06
Abstract: Embodiments of the invention provide a decoder (10) for decoding a signal received through a transmission channel in a communication system, the signal carrying information symbols selected from a given set of values and being associated with a signal vector, the transmission channel being represented by a channel matrix. The decoder comprises: a sub-block division unit (12) configured to divide the received signal vector into a set of sub-vectors in correspondence with a division of a matrix related to said channel matrix; at least one weighting coefficient calculation unit (14) configured to calculate a sub-block weighting coefficient for each sub-vector, at least one symbol estimation unit (11) for recursively determining estimated symbols representative of the transmitted symbols carried by the data signal from information stored in a stack. The at least one symbol estimation unit is configured to apply at least one iteration of a sequential decoding algorithm, the sequential decoding algorithm comprising iteratively filling a stack by expanding child nodes of a selected node of a decoding tree comprising a plurality of nodes, each node of the decoding tree corresponding to a candidate component of a symbol of at least a part of the received signal and each node being assigned an initial metric. The symbol estimation unit is further configured to calculate a modified metric for at least one node of the expanded child nodes from the metric associated with the at least one node and from the sub-block weighting coefficient calculated for the sub-vector to which the at least one node belongs, symbol estimation unit being configured to assign the modified metric to the at least one node.
-
公开(公告)号：US10257791B2
公开(公告)日：2019-04-09
申请号：US15652644
申请日：2017-07-18
Applicant: INSTITUT MINES-TELECOM / TELECOM BRETAGNE , Université Libanaise , Université Saint-Esprit de Kaslik
Inventor： Marie-Rita Hojeij , Joumana Farah , Charbel Abdel Nour , Catherine Douillard
Abstract: Power allocation in NOMA systems for example on the basis Proportional Fairness calculations depends on knowledge of user throughput on a specified sub-band, which implies that users have already been allocated to particular sub-bands. Meanwhile, maximum throughput can generally be achieved where there is the greatest possible difference in transmission power for the users on a given sub-band, so that optimal allocation of users to sub-bands requires knowledge of the power available for each user. A mechanism is proposed based on iteratively applying a waterfilling algorithm to distribute power across a progressive subset of sub-bands to provisionally distribute the power budget across that subset of sub-bands, where at each iteration the water filling algorithm is carried out for each possible combination of users assignable to the newly considered sub-band using a floor for that sub band proportional to the reciprocal of the square of the highest channel gain value of any user in that combination, and calculating a throughput for that combination with the corresponding power attribution, whereby the combination retained for the next iteration (with an additional sub-band) is whichever gives the highest throughput. This process is thus repeated until users are assigned to all sub-bands, whereupon power allocations from the last iteration are definitive.
-
公开(公告)号：US10250360B2
公开(公告)日：2019-04-02
申请号：US15836162
申请日：2017-12-08
Applicant: INSTITUT MINES-TELECOM
Inventor： Asma Mejri , Ghaya Rekaya Ben-Othman , Mohammed-Achraf Khsiba
Abstract: Embodiments of the invention provide a decoder for decoding a signal received through a transmission channel in a communication system, said signal comprising a vector of information symbols, wherein the decoder comprises: a processing unit (307) configured to determine at least one candidate set of division parameters and to perform a division of said vector of information symbols into a set of sub-vectors in association with each candidate set of division parameters, each pair of sub-vectors being associated with a division metric; a selection unit (309) configured to select one of said candidate sets of division parameters according to a selection criterion depending on said division metric; and a decoding unit (311) configured to determine at least one estimate of each sub-vector associated with said selected set of division parameters by applying a symbol estimation algorithm, wherein the decoder is configured to determine at least one estimate of the vector of information symbols from said at least one estimate of each sub-vector of information symbols.
-
公开(公告)号：US10218442B2
公开(公告)日：2019-02-26
申请号：US15593402
申请日：2017-05-12
Applicant: INSTITUT MINES-TELECOM
Inventor： El-Mehdi Amhoud , Ghaya Rekaya Ben-Othman , Yves Jaouen
IPC: H04B10/00 , H04B10/2581 , H04B7/0456 , H04L5/00 , H04L1/06
Abstract: Embodiments of the invention provide a Space-Time coding device for encoding a digital data sequence according to a predefined space-time coding rate, said data sequence comprising a set of modulated symbols to be transmitted over at least two propagation modes, during a number of time slots, through an optical transmission channel in a single-core multimode optical fiber transmission system, wherein the device comprises: a codebook generator (53) configured to determine a set of codeword matrices defining a space-time code represented by a space dimension and a temporal dimension, each codeword matrix comprising complex values and a number of columns equal to said code temporal dimension, and a number of rows equal to said code space dimension, the codebook generator (53) being further configured to associate a difference codeword matrix and a distance metric to each pair of codeword matrices among said set of codeword matrices, each component of a difference codeword matrix associated with a given pair of codeword matrices being equal to the difference between the corresponding components of the codeword matrices of said pair, the distance metric associated with a given pair of codeword matrices being determined by computing the Euclidean norm of the difference codeword matrix associated with said pair, wherein the codebook generator (53) is configured to select the components of the codeword matrices depending on the number of pairs of codeword matrices that are associated with a unitary difference codeword matrix and with a distance metric equal to a given Euclidean distance; and an encoding unit (55) configured to encode said set of modulated symbols into a codeword matrix selected from said set of codeword matrices.
-
-
-
-
-
-
-
-
-
Search Results
224
records
(took 0.038 seconds)
