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 present invention relates to the use of water-soluble or water-dispersible polymers as additives in mineral building materials. The novel polymers are obtainable by polymerizing alkoxylated derivatives of 3-allyloxy-1,2-propanediol with ethylenically unsaturated mono- or dicarboxylic acids or the anhydrides, esters or mixtures thereof and, if appropriate, with one or more further ethylenically unsaturated monomers C.

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: The invention concerns a process for the production of carbonaceous adsorption agents doped with elementary sulfur, in which sulfur is mixed with the adsorption agent, the mixture is heated to a temperature of between 120° C. and 150° C. and the temperature is maintained over a period of about an hour. The process is distinguished in that heating of the mixture is effected under a controlled oxygen-bearing atmosphere. The invention further concerns a process for waste gas cleaning using carbonaceous absorption agents doped with elementary sulfur. Preferably brown coal coke is used as the adsorption agent.

Abstract: Sorbent for the dry cleaning of waste gases charged with mercury and process for the production thereof. The sorbent includes as an adsorptively acting constituent for example activated carbons or activated cokes which are mixed with sulfur in powder form at ambient temperature, under the action of atmospheric oxygen. The sorbent is distinguished by a given ratio in respect of the median values of the grain size of the adsorptively operative constituent to the sulfur.

Abstract: A method for securely encrypting or decrypting a message or for generating or verifying a digital signature in a message, in which the message is subjected, with the aid of a processor, to a mathematical operation using a key (k) which can be represented in the form of a binary number with a sequence of bits, and computational operations are sequentially carried out on auxiliary variables for each bit. The dependence of the computational result on the values of individual bits is taken into account by reading the memory addresses from the auxiliary variables and assigning them to address variables. The difference between the addresses is calculated and, depending on the respective current bit, is added to, or subtracted from, the computer addresses. The assignment of the auxiliary variables to the address variables can thus be interchanged. As a result, the order and selection of the computational operations is controlled on the basis of bits without the program sequence having to contain jump instructions.

Abstract: In side-channel attack-resistant encoding methods, a return value (r) is determined as the modular inverse of an input value (a), by a module (M). A resistance to side-channel attack can be achieved with minimal restrictions on implementation on determination of the modular inverse with minimal technical complexity. To this end, in a first sub-step, a first product (d) of the input value (a) and a random number is generated (c), in a second sub-step, the modular inverse (e) of the first product (d) is determined by the module (M), in a third sub-step, a second product (b) of the random number (c) is determined by the modular inverse (e) and in a fourth sub-step the return value (r) is set to the same as the second product (b).

Abstract: The invention relates to a method and a device for the generation of checkable forgery-proof documents with an externally supplied cryptographic module, whereby the checking of authenticity of the document is carried out without using key information belonging to the cryptographic module. According to the invention, the method and the device are characterised in that the cryptographic module is supplied with two types of data, even on supply from a communication partner which is cryptographically not trustworthy, which either remain in the cryptographic module or are attached to the document. The information remaining in the cryptographic module is used to secure the document information by means of a check value and the information transferred into the document serves to verify the securing of the document by the cryptographic module during a check of the authenticity of the document at a checkpoint.

Abstract: The invention concerns a carbonaceous sorbent in powder or grain form for the dry cleaning of waste gases from thermal processes. The sorbent includes carbon adsorbents from the group of activated carbon and/or brown coal cokes which are modified with sulfur and/or sulfur compounds. The sorbent is distinguished in that the specific surface area of the carbon adsorbents in m2/g in relation to the pore volume of the micropores in cm3/g is between 2400 and 2700.

Abstract: The invention relates to a security module characterized in that said module contains a data input port via which information can be inputted into the security module. The security module has at least two data output ports whereby data can be outputted via a first data output port and transferred to an authentication unit and whereby data can be outputted via a second data output port. Said data can be transferred to a document to be exported. Said security module has at least two combination machines. A first combination machine generates a first result value for a first data output and a second combination machine generates a result value for the second data output. The invention relates to the use of a security module for generating forge-proof documents.

Abstract: The invention relates to a method and a device for the generation of checkable forgery-proof documents with an externally supplied cryptographic module, whereby the checking authenticity of the document is carried out without using key information belonging to the cryptographic module. According to the invention, the method and the device are characterized in that the cryptographic module is supplied with two types of data, even on supply from a communication partner which is cryptographically not trustworthy, which either remain in the cryptographic module or are attached to the document. The information remaining in the cryptographic module is used to secure the document information by means of a check value and the information transferred into the document serves to verify the securing of the document by the cryptographic module during a check of the authenticity of the document at a checkpoint.

Abstract: The disclosure relates to a system and method for franking mail. An exemplary method for franking mail comprises generating a printing master copy of a postage indicium, encrypting the printing master copy of the postage indicium, transmitting the printing master copy to an operating unit, together with a request that, after the postage indicium has been printed out, information about the printing of the postage indicium is to be stored, decrypting the printing master copy in a secure area of the operating unit in order to print the postage indicium, whereby the secure area is a component of a universal standard program for displaying and/or printing text and/or graphic elements, and responsive to a request for printing the postage indicium, storing information about the printing in the printing master copy and/or in an authorization database, whereby the printing of the postage indicium is blocked if the information about the printing is already present.

Abstract: A method for authentication and identification uses different keys for the prover and the verifier, but on the other hand dispenses with the utilization of long number modulo arithmetic by the use of simple basic components such as, for example, arithmetic operations in finite bodies GF(2n). A private key is stored in the prover, so that the latter can receive, in encrypted form, data elements generated as random elements and can itself utilize them again as key for an authentication method of a data set to be transmitted. The verifier receives the authenticator thus formed and checks it. If the data set is generated by the verifier and transmitted to the prover, then this method can serve for the identification of the prover. The method is particularly advantageous in the area of smart cards, since there the required space in the hardware implementation can be considerably reduced.

Abstract: A method and device for franking mailpieces. An operating unit, which is separated from a franking unit, transmits a transaction request to an authorization unit. The authorization unit ascertains an authorization of a user of the operating unit on the basis of an authorization profile. The transmitted transaction request is authenticated by the authorization unit according to the ascertained authorization. The authorization unit converts the authenticated transaction request into a transaction job. The transaction job is transmitted to the franking unit. The authorization unit is authenticated in the area of the franking unit. The transaction job is processed in the franking unit and the result of the execution of the transaction job is sent out by the franking unit.

Abstract: Backing plate for sputter targets made of a composite material which comprises 5 to 99 wt. % of at least one refractory metal from the group consisting of Mo, W, Re and Ta and 95 to 1 wt. % of at least one fuirther metallic component from the group consisting of Cu, Ag and Au, process for the production thereof and unit which comprises the backing plate and a sputter target.

Abstract: An encryption part or a decryption part of an encryption/decryption apparatus or a part common to both parts is used both for encryption and decryption of a datum to be stored and the encrypted memory content and for the generation of the address-individual key and the address-dependent key, respectively.

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: The invention relates to a method for producing forgery-proof documents using a security module, whereby the security module generates a temporary secret which remains unknown to a document producer, whereby the temporary secret, together with information that reveals details about the identity of the security module, is transferred in encrypted form to an authentication unit, whereby an authentication unit decrypts the temporary secret, recognizes the identity of the security module and encrypts the temporary secret, together with additional information, in such a way that only a checking unit can carry out a decryption and then the authentication unit transmits the encrypted temporary secret and the additional information to the document producer, whereby the document producer transfers its own data, which has been introduced into the document, to the security module, whereby the security module irreversibly links the temporary secret with the data that the document producer itself has introduced, in such a

Abstract: The invention relates to a method for franking postal items. The franking note is prepared on a central system and is then transferred to a client system to be printed out. The franking note is transferred from the central system to the client system in two steps. In a first step, an invalid pre-print of the franking note is transferred and in the second step, the valid franking note is transferred to the central franking system by feeding it back to the central system, said feedback being controlled by the printing process. The invention also relates to a suitable device for carrying out the method.

Abstract: A composition comprising an aqueous polymer dispersion, characterised in that a) the composition contains 0.001 to 0.5 mol of a photo-initiator, which causes a cross-linking reaction on irradiation with energy-rich light and b) the polymer dispersed in the dispersion has 0.0001 to 1 mol of keto or aldehyde groups, whereby the mol amounts relate to 100 g of the dispersed polymer.