Abstract: A cryptographic operation is protected. The protecting includes performing a matrix transformation operation on a matrix having n rows and n columns, each row forming a respective vector of a first set of ordered vectors. A second set of ordered vectors is generated by shifting values of vectors of the first set of ordered vectors in a first direction, wherein a pitch of a shift applied to a vector of the first set of ordered vectors is based on an order number of the vector of the first set of ordered vectors. A working vector is generated by logically combining vectors of the second set of ordered vectors. A third set of ordered vectors is generated based on the second set of ordered vectors. A fourth set of ordered vectors is generated based on the third set of ordered vectors and the working vector.

Abstract: The present description concerns a method of verification, implemented by an electronic device, of a matrix used for the implementation of a data cipher algorithm comprising, for the generation of the matrix, the use of a first function and of a second function, the verification method comprising a verification using a final portion of the output data of the first function.

Abstract: The present description concerns a method of checking a first data element, executed by an electronic device comprising a processor and a memory, wherein said first data element is not stored in said memory and is divided in N second data elements independent from the first data element, each second data element being stored in said memory, and a result of an application of a XOR function to the N second elements being equal to the first data element, wherein an image of the first data element by a CRC function linear with respect to the XOR function is stored in said memory, and said method comprising a step, executed by said processor, of checking if said image of the first data element by said CRC function is equal to an application of the XOR function to the images of N second elements by said CRC function.

Abstract: Systems and methods are provided for separating layers of tissue along planes by delivering a gas, such as CO2, under pressure to the tissue. An instrument for dissecting tissue comprises an elongate shaft with a proximal end configured for coupling to an external source of gas and an open distal end fluidly coupled to the proximal end. An internal reservoir containing CO2 under pressure is disposed within the instrument and a valve is coupled to the internal reservoir to open and close an outlet of the reservoir, thereby allowing the CO2 from the internal reservoir to flow through the internal lumen and to a target site within the patient. The internal reservoir of gas allows the CO2 to be delivered to the target site at a substantially higher flow rate, which increases the performance of the device in separating tissue layers.

Abstract: Disclosed is a device for resecting an organ in a cavity of a living body. The device includes a guide with a tube and a tube, both cylindrical, the tube being mounted in the first tube; an electrical conductor surrounded by an electrically insulating sheath, the tube being a cylinder of revolution with an inner radius of value R1, the tube including a part which is a cylinder of revolution with an outer radius of value R2<R1 and with an angle at the center of a value Ac, and a part which is not a cylinder of revolution and has an angle at the center of value “360°?Ac”; the insulated conductor contacts the part of the tube, between the outer and inner walls of this tube; and a unit for keeping this insulated conductor in contact with the part of the tube.

Abstract: The Trocar structure for abdominal surgery comprises a cannula having at one end a guide element provided with a valve for maintaining the positive intracavitary pressure and a shaft having, at one end a head and at the opposite end a tip, advantageously the valve is made of a single piece of silicone and has first elastically deformable sealing means for maintaining the positive intracavitary pressure during the passage of the shaft and of a surgical instrument through the cannula and second elastically deformable sealing means engaging the guide element.

Abstract: Disclosed are laparoscopy forceps, including a yoke with a hole, two jaws; a unit for mounting the jaws to pivot relative to the yoke about an axis; a control rod mounted to move in translation in the hole; a pantograph connecting the rod and two jaws using links mounted to pivot on the rod about an axis, two cams secured to the jaws, a mount for each link to pivot relative to a respective one of the two cams about axes, the four pivot axes being parallel, the outside diameter of the yoke being 2D, the width of the links being 2E, the distance between the axes when the two grip faces of the jaws are in contact being 2C, the angle under such circumstances between the axes being 2A, and the values D, E, C, and A being substantially associated by the following equation: D=C+E/cosA.

Abstract: The present invention relates to laparoscopy forceps.

Abstract: The Trocar structure for abdominal surgery comprises a cannula having at one end a guide element provided with a valve for maintaining the positive intracavitary pressure and a shaft having, at one end a head and at the opposite end a tip, advantageously the valve is made of a single piece of silicone and has first elastically deformable sealing means for maintaining the positive intracavitary pressure during the passage of the shaft and of a surgical instrument through the cannula and second elastically deformable sealing means engaging the guide element.

Abstract: Disclosed is a device for resecting an organ in a cavity of a living body. The device includes a guide with a tube and a tube, both cylindrical, the tube being mounted in the first tube; an electrical conductor surrounded by an electrically insulating sheath, the tube being a cylinder of revolution with an inner radius of value R1, the tube including a part which is a cylinder of revolution with an outer radius of value R2<R1 and with an angle at the center of a value Ac, and a part which is not a cylinder of revolution and has an angle at the center of value “360°?Ac”; the insulated conductor contacts the part of the tube, between the outer and inner walls of this tube; and a unit for keeping this insulated conductor in contact with the part of the tube.

Abstract: A device for resecting an organ in a cavity of a living body, in particular of a human being, includes a guide defining a duct opening out at both ends; two electrical conductors slidably mounted in the duct; an open loop made of a material that is electrically conductive and resistive in order to be suitable for producing heat by the Joule effect; elements for electrically connecting the two terminals respectively to the ends of the conductors; the loop being arranged so as to be suitable for taking on two states, namely a first state in which an orthogonal projection of its overall section onto a plane perpendicular to the longitudinal axes lies within the inside section of the duct as defined in the same plane, and a second state in which its overall section is greater than the inside section of the duct

Abstract: This invention relates to materials suitable as metal scavengers and catalysts. The materials are prepared by functionalizing silicate materials such as silica or SBA-15 with a thiol or amine, or other functionalizing agent, in a sol gel process. In a preferred embodiment, the metal is palladium and the functionalizing agent is a thiol. The material may be used as a catalyst for the Suzuki-Miyaura and Mizoroki-Heck coupling reactions. The catalyst materials have extremely low metal leaching, are very stable, and are completely recyclable.