Abstract: A method, implemented by at least one apparatus, for comparing a first dataset and a second dataset, in particular with a view for determining whether these two datasets are identical. The method not requiring the presence of these two datasets in the apparatus, and including the following steps of: a) mixing a number, called the mixer number, with the first dataset, using a mixing function, in order to obtain mixed data, b) hashing the mixed data using a hash function, and c) comparing the hash thus obtained in step b) with a third dataset assumed to be the hash of the second dataset mixed with the same mixer number as that used in step a) and with the same mixing function.

Abstract: Cryptographic method for verifying data method, implemented by at least one apparatus, for comparing a first dataset and a second dataset, in particular with a view to determining whether these two datasets are identical, this method not requiring the presence of these two datasets in the apparatus, and comprising the following steps: a) mixing a number, called the mixer number, with the first dataset, using a mixing function in order to obtain mixed data, b) hashing the mixed data using a hash function, and c) comparing the hash thus obtained in step b) with a third dataset assumed to be the hash of the second dataset mixed with the same mixer number as that used in step a) and with the same mixing function.

Abstract: Method for calculating a modifier code of a file, the method comprising the following steps: a) establishing a list of possible modifier codes; b) establishing a list of a plurality of possible mixer numbers; c) for each modifier code: i) creating a list of hashes of the file; ii) for each mixer number, calculating the hash of the file mixed and modified by the modifier code, the modification of the file being performed using the same modification function; iii) adding each hash calculated in step ii) to the list of hashes of the file; iv) counting the number of different elements N of the list of hashes; v) memorizing this number N, as well as the associated modifier code, if N is the first to be counted or is greater than the number N previously memorized; and d) returning the last modifier code memorized.

Abstract: Optical router for distributing optical signals, including at least three input/output ports, each designed to be optic ally connected to a transceiver, each input/output port comprising an optical routing system connected to a plurality of optical paths, each of the optical paths also being connected to another of the optical routing systems so as to optically connect the input/output port to each of the other input/output ports, the optical routing system being configured to passively direct an optical signal received by the input/output port into one of the optical paths chosen on the basis of the wavelength of said optical signal.

Abstract: A method, implemented by at least one apparatus, for comparing a first dataset and a second dataset, in particular with a view to determining whether these two datasets are identical. This method not requiring the presence of these two datasets in the apparatus, and including the following steps a) mixing a number, called the mixer number, with the first dataset, using a mixing function, in order to obtain mixed data, b) hashing the mixed data using a hash function, and c) comparing the hash thus obtained in step b) with a third dataset assumed to be the hash of the second dataset mixed with the same mixer number as that used in step a) and with the same mixing function.

Abstract: A method, implemented by at least one apparatus, for comparing a first dataset and a second dataset, in particular with a view for determining whether these two datasets are identical. The method not requiring the presence of these two datasets in the apparatus, and including the following steps of: a) mixing a number, called the mixer number, with the first dataset, using a mixing function, in order to obtain mixed data, b) hashing the mixed data using a hash function, and c) comparing the hash thus obtained in step b) with a third dataset assumed to be the hash of the second dataset mixed with the same mixer number as that used in step a) and with the same mixing function.

Abstract: A quantum communication system including an emitter of entangled photons, including a source configured in order to generate at least one pair of entangled photons. The at least one pair of entangled photons including a first photon (P1) emitted on a first propagation path (D1) and simultaneously a second photon (P2) emitted on a second propagation path (D2) different to the first propagation path. A first receiver arranged on the first propagation path (D1), including a complex absorber to absorb the photon in a polarization state selected from among the states of at least two different pairs of complementary polarization states. A second receiver arranged on the second propagation path (D2), including an optical amplifier making it possible to multiply the second photon (P2) while preserving its polarization and a measuring instrument making it possible to measure the average polarization of the multiplied photons.

Abstract: The engine includes a chamber having an intake and an output for a fluid; a first enclosure configured to contain a source material; a system for at least partially ionizing the source material; and an ion accelerator configured to accelerate the ionized source material towards the chamber so as to cause the fusion of atomic nuclei of the ionized source material with atomic nuclei of the fluid.

Abstract: A quantum communication system including an emitter of entangled photons, including a source configured in order to generate at least one pair of entangled photons. The at least one pair of entangled photons including a first photon (P1) emitted on a first propagation path (D1) and simultaneously a second photon (P2) emitted on a second propagation path (D2) different to the first propagation path. A first receiver arranged on the first propagation path (D1), including a complex absorber to absorb the photon in a polarization state selected from among the states of at least two different pairs of complementary polarization states. A second receiver arranged on the second propagation path (D2), including an optical amplifier making it possible to multiply the second photon (P2) while preserving its polarization and a measuring instrument making it possible to measure the average polarization of the multiplied photons.

Abstract: The present invention is a method for producing electricity comprising a fuel cell which makes it possible to valorize the heat given off by the cell to generate fuel for said fuel cell by a process of thermal dissociation, applied to the product of the same chemical composition than that produced by the cell, at least part of the heat given off by the cell being supplied to at least one of the endothermic reactions of said dissociation process.

Abstract: A method for geolocating a receiver by measuring times of reception, by the receiver, of a plurality of geolocation signals originating from a plurality of emitters, the geolocation signals are emitted on multiple different wavelengths, at least one geolocation signal having a frequency less than 1 GHz.

Abstract: A method for certifying the geolocation of a receiver, including, prior to said certification, receiving, at predetermined times, in addition to the geolocation signals emitted by a plurality of emitters and used to compute said geolocation, a predetermined number of additional electromagnetic signals emitted by the same emitters and including data used to authenticate the geolocation, the method comprising determining the authenticity of the geolocation on the basis of the additional electromagnetic signals.

Abstract: Method for automatically protecting an object, a person, or an item of visual information from a risk of unwanted viewing by a third party, an unauthorized person and/or an image-recording device, The method includes the steps of: automatically detecting, by analyzing images from at least one lidar or from a camera arranged so as to cover a predefined surveillance area, the presence of a third party or of an unauthorized person and/or of the device in this area or nearby, the predefined surveillance area corresponding at least to an area from which the person or the device is capable of viewing the object, the person or the information, and in the event of positive detection, triggering a predefined action.

Abstract: Method for transforming a first file on an electronic device into a second file able to be used on the device and/or on another electronic device. The conversion is performed by the device or by another apparatus to which the devices are able to connect on the basis of: the version of the first file, versions acceptable for the second file, as defined in a register or file of one of the devices, and conversion means that the devices or apparatus has In the event of one of the devices or apparatus connecting directly or indirectly to a server or to the apparatus having a more recent version of the first file, the first file is replaced with the more recent version prior to its transformation, the more recent version present on the server or the other apparatus being listed as being able to replace the first file.

Abstract: A method for securing communication within a system including at least one server and at least two appliances able to communicate with the server and with each other, wherein a pair of appliances communicating together and having at least one shared one-time encryption key for securing communication between the two has at least one other shared one-time encryption key supplied by the server following the connection of only one of the two appliances to said server.

Abstract: A method, implemented by at least one apparatus, for comparing a first dataset and a second dataset, in particular with a view for determining whether these two datasets are identical. The method not requiring the presence of these two datasets in the apparatus, and including the following steps of: a) mixing a number, called the mixer number, with the first dataset, using a mixing function, in order to obtain mixed data, b) hashing the mixed data using a hash function, and c) comparing the hash thus obtained in step b) with a third dataset assumed to be the hash of the second dataset mixed with the same mixer number as that used in step a) and with the same mixing function.

Abstract: Cryptographic method for verifying data method, implemented by at least one apparatus, for comparing a first dataset and a second dataset, in particular with a view to determining whether these two datasets are identical, this method not requiring the presence of these two datasets in the apparatus, and comprising the following steps: a) mixing a number, called the mixer number, with the first dataset, using a mixing function in order to obtain mixed data, b) hashing the mixed data using a hash function, and c) comparing the hash thus obtained in step b) with a third dataset assumed to be the hash of the second dataset mixed with the same mixer number as that used in step a) and with the same mixing function.

Abstract: A method for performing at least one secure exchange within a system including first and second electronic devices (20A, 20B) and a dual reader (10) including means for connection to each of the devices and preferably a human-machine interface, and at least one server (30) to which information relating to the exchange is able to be communicated, this method including the steps of: a) entering, into the reader (10), using its interface or an external apparatus that is connected thereto, an item of information relating to an exchange to be performed between the first and second devices (20A, 20B), b) registering, in the first device (20A), using the reader (10), an item of information relating to the exchange, c) registering, in the second device (20B), in particular using the reader (10), an item of information relating to the exchange, and by default canceling the exchange, d) transmitting the data relating to said transaction to said server (30).

Abstract: A method for performing at least one secure exchange within a system including first and second electronic devices (20A, 20B) and a dual reader (10) including means for connection to each of the devices and preferably a human-machine interface, and at least one server (30) to which information relating to the exchange is able to be communicated, this method including the steps of: a) entering, into the reader (10), using its interface or an external apparatus that is connected thereto, an item of information relating to an exchange to be performed between the first and second devices (20A, 20B), b) registering, in the first device (20A), using the reader (10), an item of information relating to the exchange, c) registering, in the second device (20B), in particular using the reader (10), an item of information relating to the exchange, and by default canceling the exchange, d) transmitting the data relating to said transaction to said server (30).