Abstract: The invention relates to an encoding method for identifying a subsequential manipulation of a counter meter reading consisting, when the counter reading is increased or decreased, in activating the computation of a new encoded meter reading and in calculating a new encoded meter reading by applying a forward chain one-way function to the encoded meter reading, wherein a complex variable domain of said forward chain one-way function is included into the antecedent domain thereof.

Abstract: In a data transmission method for a tachograph system, digital messages are transmitted between a speed transmitter (MS) and a recording unit (RU). The digital messages contain a pair of keys including a public key (KMP, KRP) and a private key (KMS, KRS), as well as a certificate (ZM, ZR) derived from the respective pair of keys. The public keys (KMP, KRP) and the certificates (ZM, ZR) are mutually verified between the recording unit (RU) and the speed transmitter (MS). If the verification is positive, the speed transmitter (MS) detects sensor data, and a digital message is generated therefrom. In addition, the speed transmitter (MS) generates authentication data for the message in accordance with the pair of keys (KMP, KMS) thereof. The message and the authentication data are transmitted to the recording unit and are processed there in accordance with a validity of the authentication data verified by the recording unit (RU).

Abstract: Conventional cryptographic methods that are based on elliptic curves are prone to side-channel attacks. Previously known methods for preventing side-channel attacks have the disadvantage of requiring high arithmetic capacity and a large amount of available memory space. The proposed method overcomes said disadvantage by using a process for verifying points on elliptic curves which saves arithmetic capacity and memory space.

Abstract: The invention relates to a method for coding a data word having a prescribed quantity of arbitrary data symbols and a prescribed quantity of a reference data symbols, wherein a checksum with a prescribed quantity of cheek symbols is calculated for the data word and the quantity of arbitrary data symbols corresponds at least to the quantity of check symbols of the checksum.

Abstract: There is provided a method for conveying a mailpiece, whereby a first machine-readable code is applied onto the mailpiece as a data matrix code or stored in a transponder. An exemplary method comprises detecting the machine-readable code by at least one reading unit. The exemplary method also comprises applying a second machine-readable code onto the mailpiece as a linear code or storing the second machine-readable code in the transponder. The exemplary method additionally comprises storing information about a link between the first code and the second code in a data processing system. A service request is received and, depending on content of the service request, the service request is converted and forwarded to a provider server for a service.

Abstract: The aim of the embodiments is to provide a method for the secure processing of data, in which security is increased in relation to side channel attacks. To achieve this, operation codes for commanding co-processors are determined, for example for the bit-dependent transposition of register contents. The solution exploits the fact that as a result of the technical configuration for the co-processor, a shift of register contents, for example from register A to register B cannot be differentiated from the exterior from a shift from register A to register C.

Abstract: Aqueous composition comprising a polyurethane (A) an epoxy resin (B) obtainable by reacting compounds having epoxide groups with diols or polyols, and a crosslinker (C) for the epoxy resin.

Abstract: Protection program commands are inserted into at least one program command sequence of program commands in a program, to produce and check a monitoring flow marking sequence.

Abstract: There is provided a method for detecting a machine-readable code that has been applied onto a mailpiece in a selected area of a surface of the mailpiece, whereby the selected area is at least 1 cm away from at least one nearby edge area of the mailpiece. An exemplary method comprises checking for the presence of at least two parallel lines in the selected area. The exemplary method also comprises beginning a detection of modules of the machine-readable code comprising a data-matrix code at a predefinable distance from one of the lines.

Abstract: The invention relates to a gasification reactor (1) and associated method for the entrained-flow gasification of solid fuels under pressure. The reactor essentially consists of a pressure vessel (4) that can be cooled and an inner jacket (7) that is equipped with a heat shield. At least one crude gas outflow (8) is located at the upper end of the cylindrical pressure vessel and at least one bottoms withdrawal outlet (30) is located at the lower end, the pressure vessel having at least enough space for a moving bed (13), an entrained flow (11) that circulates internally above the surface of the moving bed and a buffer zone (3) situated above said entrained bed.

Abstract: There is provided a method and system for producing an intelligent document comprising a program which, when a precondition has been met, can be executed by a program execution environment, the intelligent document containing contents that can be displayed by a display program. An exemplary method comprises incorporating a program module into the intelligent document, the program module being configured to create displayable information indicating a result of a checking step in order to check whether the precondition has been met within the intelligent document. The exemplary method also comprises inserting displayable information indicating a negative result of the checking step into the intelligent document. The exemplary method additionally comprises transforming, with the program module, the information indicating the negative result of the checking step into displayable information indicating a positive result of the checking step.

Abstract: The embodiments relate to a method for the encrypted data exchange between subscribers of a communication system using cryptography based on elliptical curves, wherein upon a query by a first subscriber a scalar multiplication is calculated by the second subscriber, wherein merely part of the result of the scalar multiplication is returned to the first subscriber as a response. The invention relates to a communication system.

Abstract: A method determines an elliptical curve, suitable for a cryptographic method. An elliptical curve to be tested is prepared. The order of a twisted elliptical curve associated with the elliptical curve to be tested is determined. It is automatically checked whether the order of the twisted elliptical curve is a strong prime number. If the order of the twisted elliptical curve is a strong prime number, the elliptical curve to be tested is selected as an elliptical curve suitable for cryptographical methods.

Abstract: A method for franking mail, whereby a franking mark is generated in a franking unit, transmitted to an operating unit, connected to the franking unit, and printed out in a printing unit. A user interface is provided at the operating unit by the franking unit, and the printing out of the franking mark, generated in the franking unit and transmitted to the operating unit, is controlled by the user interface, whereupon the franking mark is printed exactly once one each piece of mail. The invention further relates to a device suitable for carrying out said method.

Abstract: An authentication method authenticates between subscribers of a communications system using an asymmetric elliptic curve encryption algorithm. The method involves providing a first and at least one second subscriber having a first or second secret key known only to the respective subscriber and a public key; authenticating an inquiry transmitted by the first subscriber with respect to the validity of the first certificate contained therein and associated with the first subscriber; calculating the response of the second subscriber associated with the inquiry; randomized encryption of the calculated response and a second certificate associated with the second subscriber using the public key; decryption and authentication of the response transmitted by the second subscriber with respect to the validity of the second certificate contained therein.

Abstract: Water-soluble or water-dispersible polymers comprising alkoxylated diallylamine derivatives, ethylenically unsaturated mono- or dicarboxylic acids, the anhydrides thereof or mixtures thereof and, if required, one or more further ethylenically unsaturated monomers C are prepared and are used as additives in mineral building materials, in detergents or in cosmetic formulations.

Abstract: A method performs scalar multiplication of points on an elliptic curve by a finite expandable field K of a first field Fp of a p>3 characteristic, wherein said characteristic p has low Hamming weight and the expandable field has a polynomF(X)+Xd?2 of order d in the polynomial representation thereof.

Abstract: A device for generating a pseudorandom sequence of numbers includes a feedforward coupler, which has a plurality of memory units, and a feedback coupler connected between an input and an output of the feedforward coupler. The feedback coupler includes a changeable feedback characteristic and is embodied to change the feedback characteristic depending on a state of a memory unit of the plurality of memory units of the feedforward coupler.

Abstract: The invention relates to an apparatus for evaporating solid materials, for instance, selenium for coating a substrate. The solid material is brought into a first crucible via a feeding source. In this crucible the material melts at a temperature which is preferably slightly higher than its melting point. The molten material flows via a transporting device, for instance, a pipe into a second crucible, where the material evaporates at a temperature higher than its boiling point and is transported to a substrate. In order to stop the evaporation within a very short time preferably within only one to two minutes, a cooling device for cooling the material beyond its melting point is arranged at the transporting device. With this cooling device the material in the transporting device can be cooled down beyond its melting point in a very short time.

Abstract: Conventional cryptographic methods that are based on elliptic curves are prone to side-channel attacks. Previously known methods for preventing side-channel attacks have the disadvantage of requiring high arithmetic capacity and a large amount of available memory space. The proposed method overcomes said disadvantage by using a process for verifying points on elliptic curves which saves arithmetic capacity and memory space.