Abstract: A method for calculating the modular inverse of a value in relation to a module is used for cryptographic calculations on a portable data carrier. The method includes determining a breakdown of the module into at least two factors, calculating a respective auxiliary value for each of the factors, wherein each auxiliary value is the modular inverse of the value in relation to the respective factor as module, and calculating the modular inverse of the value in relation to the module using the calculated auxiliary values. The method offers an increase in efficiency, with greater efficiency obtained the stronger the computing outlay depends on the length of the module in the inversion method. The method is suitable for execution by relatively low-power processors, and security of the calculation against spying attacks is not impaired. If security requirements are high, combining the method with suitable measures against spying presents no problems.

Abstract: In a method for protected execution of a cryptographic calculation in which a key with at least two key parameters is drawn on, an integrity check of the key is performed, in order to prevent a cryptographic attack in which conclusions are drawn as to at least one second key parameter by corrupting at least one first key parameter. A further method serves to determine a key for a cryptographic calculation with at least two key parameters provided for use in the first-mentioned method. A computer program product and a portable data carrier have corresponding features. The methods enable particularly good protection of cryptographic calculations against attacks.

Abstract: A protective wall (1) for shielding against laser beams, in particular those stemming from welding machines, wherein the protective wall (1) contains light-alloy shaped sections (10-13) that are essentially rectangular and incorporates chambers that are formed by interior walls (2), and profilings that are formed on the front and/or side, wherein the light-alloy shaped sections (10-14) are lined up and connected side wall to side wall in an individually removable manner to form the protective wall (20, 22; 21, 23; 24, 25) in such a way that the profiling on the side is implemented step-like from a front wall (26) to a back wall (27).

Abstract: A hollow chamber profile system for precision superstructures for gauges, measuring and control devices, and all types of devices, having first bore holes (9) which are arranged in a defined modular dimension, and second bore holes (11) which are arranged, in the same modular dimension, on a plane which is rotated by 90 degrees in relation to the plane of the first bore holes (9), are used to receive connecting and/or fixing elements with threaded parts (15) comprising screw threads (16), the diameter of said threaded parts corresponding to the bore holes (9), and in which screws (17) are received. The system has a rectangular or quadratic cross-section, with outer walls (3) comprising vertical bore holes (9) which are perpendicular to each other. The hollow chambers (2) are formed by inner walls (4), by inner walls (4) and outer walls (3), or by outer walls (3), and the connecting and fixing elements comprise guiding elements (13) and adapters (18, 18?).

Abstract: A process for producing a casing acting as a screen against electromagnetic radiation, more particularly intended for electronic operational elements, comprising a screening profile arranged in a predetermined portion of at least one part of the casing, said screening profile being made of elastic, conductive material, the elastic, conductive material being applied, by means of pressure from a needle or nozzle, directly onto the portion of the casing part, on which the screening profile is to be arranged, and a casing produced according to said process.

Abstract: The invention relates to a method for producing an electromagnetic shielding gasket. The task is accomplished, according to the invention, through a method according to claim 1 as well as an electrical apparatus having a corresponding gasket according to claim 6. Advantageous further developments are described in the dependent claims. Method for producing an electromagnetic shielding gasket by means of a shielding substance that contains a silicone plastic mass, electrically-conducting components, and components that are expandable under the influence of heat, in which method the gasket compound is dispensed onto a housing and/or printed circuit board and/or housing parts, and after and/or during the dispensing is treated with heat, thereby obtaining its desired, predetermined expansion and/or shape.

Abstract: In a method for protected execution of a cryptographic calculation in which a key (12) with at least two key parameters (p, q, pinv, sp, dp, sq, dq) is drawn on, an integrity check (30, 34, 40, 54) of the key (12) is performed, in order to prevent a cryptographic attack in which conclusions are drawn as to at least one second key parameter (p, q, pinv, sp, dp, sq, dq) by corrupting at least one first key parameter (p, q, pinv, sp, dp, sq, dq). A further method serves to determine a key for a cryptographic calculation with at least two key parameters (p, q, pinv, sp, dp, sq, dq), provided for use in the first mentioned method. A computer program product and a portable data carrier have corresponding features. The invention enables particularly good protection of cryptographic calculations against attacks.

Abstract: A process for producing a casing acting as a screen against electromagnetic radiation, more particularly intended for electronic operational elements, comprising a screening profile arranged in a predetermined portion of at least one part of the casing, said screening profile being made of elastic, conductive material, the elastic, conductive material being applied, by means of pressure from a needle or nozzle, directly onto the portion of the casing part, on which the screening profile is to be arranged, and a casing produced according to said process.

Abstract: The invention relates to a method for producing an electromagnetic shielding gasket. The task is accomplished, according to the invention, through a method according to claim 1 as well as an electrical apparatus having a corresponding gasket according to claim 6. Advantageous further developments are described in the dependent claims. Method for producing an electromagnetic shielding gasket by means of a shielding substance that contains a silicone plastic mass, electrically-conducting components, and components that are expandable under the influence of heat, in which method the gasket compound is dispensed onto a housing and/or printed circuit board and/or housing parts, and after and/or during the dispensing is treated with heat, thereby obtaining its desired, predetermined expansion and/or shape.

Abstract: In a method for calculating the modular inverse R of a value E in relation to a module M, a breakdown of the module M into at least two factors M1, M2 is determined, a respective auxiliary value R1, R2 is calculated for each of the factors M1, M2, wherein each auxiliary value R1, R2 is the modular inverse of the value E in relation to the respective factor M1, M2 as module, and the modular inverse R is calculated at least using the calculated auxiliary values R1, R2. A computer program product and a portable data carrier have corresponding features. The invention provides a method for modular inversion which is efficient when performed by a machine, the method in particular being suitable for use for cryptographic calculations on a portable data carrier.

Abstract: A fastening device for attaching components to devices, which comprises at least two members that are joined together in a releasable interlocking manner in angle steps about at least one axis, characterised in that the members are joined by means of an insertion member and the positive interlocking of the connection is achieved by means of external and corresponding internal toothing.

Abstract: A protective wall (1) for shielding against laser beams, in particular those stemming from welding machines, wherein the protective wall (1) contains light-alloy shaped sections (10-13) that are essentially rectangular and incorporates chambers that are formed by interior walls (2), and profilings that are formed on the front and/or side, wherein the light-alloy shaped sections (10-14) are lined up and connected side wall to side wall in an individually removable manner to form the protective wall (20, 22; 21, 23; 24, 25) in such a way that the profiling on the side is implemented step-like from a front wall (26) to a back wall (27).

Abstract: The invention relates to a method for producing an electromagnetic shielding gasket by using a shielding compound that comprises a silicone plastic compound, electrically conducting parts and parts that expand under the influence of heat. The shielding compound is dispensed onto a housing and/or a circuit board and/or parts of the housing and is heat-treated after and/or during application, thereby providing the dispensed compound with the desired predetermined expansion and/or shape.

Abstract: The invention relates to a hollow chamber profile system for precision superstructures for gauges, measuring and control devices, and all types of devices, comprising first bore holes (9) which are arranged in a defined modular dimension, and second bore holes (11) which are arranged, in the same modular dimension, on a plane which is rotated by 90 DEG in relation to the plane of the first bore holes (9), are used to receive connecting and/or fixing means with threaded parts (15) comprising screw threads (16), the diameter of said threaded parts corresponding to the bore holes (9, 11), and in which screws (17) are received. Said system has a rectangular or quadratic cross-section, with outer walls (3) comprising vertical bore holes (9, 11) which are perpendicular to each other. The hollow chambers (2) are formed by inner walls (4), by inner walls (4) and outer walls (3), or by outer walls (3), and the connecting and fixing means comprise guiding elements (13) and adapters (18, 18?).

Abstract: The invention relates to a method for producing an electromagnetic shielding gasket.

Abstract: A process for producing a casing acting as a screen against electromagnetic radiation, more particularly intended for electronic operational elements, comprising a screening profile arranged in a predetermined portion of at least one part of the casing, said screening profile being made of elastic, conductive material, the elastic, conductive material being applied, by means of pressure from a needle or nozzle, directly onto the portion of the casing part, on which the screening profile is to be arranged, and a casing produced according to said process.

Abstract: Device housing with a shielding gasket or wall that has a conductive coating, said conductive coating being formed as a thin layer of tin or a tin alloy.

Abstract: Device housing designed to enclose an electronic device and incorporating an electromagnetically shielded three-dimensional region, which comprises at least one shielding wall constructed by dispensing onto a substrate a plurality of substantially superimposed, and in particular fused to form a material unit, beads of an elastomer or soft plastic, or by dispensing a single, tall elastomer or soft-plastic bead with a height at least twice its width, wherein the elastomer or soft plastic is filled so as to be electrically conductive and/or the shielding wall as a whole has a conductive coating.

Abstract: The invention concerns a method of making a mechanical and electrically conductive connection between a printed circuit board or a housing portion and an electrically conductive covering (metal cap) for electromagnetic shielding.

Abstract: Method of producing a shielding casing (4) in which there is provided a sealing and shielding profile section (9) which fills a gap between first and second adjoining casing portions (1, 2) and which comprising pasty material is applied under pressure from a coordinate-controlled applicator device (5) having an applicator needle or nozzle directly on to onto the first casing portion and then sets there elastically adhering thereto in self-supporting relationship, wherein the sealing and shielding profile section is produced by simultaneously applying at least one first material (8a) with material properties adapted for a good sealing action and a second material (8b) with material properties adapted to a good shielding action, from the applicator needle or nozzle (6) provided with at least a first and a second passage (6a, 6b), whereby the second material firmly adheres to the first material.