Abstract: A secure token transaction unit includes: an offline token receiving unit configured for receiving at least one offline token of an electronic token transaction system from at least one other secure token transaction unit of the electronic token transaction system; an offline token storage unit configured for storing the received at least one offline token of the electronic token transaction system; wherein in a collector mode of the secure token transaction unit, the received offline token is stored such that its spendability is restricted.

Abstract: A method relates to a terminal for managing electronic coin datasets and to a corresponding terminal. The electronic coin datasets are output by a central issuer entity, wherein each electronic coin dataset has a test value, and the test value is incremented when the electronic coin dataset is directly transmitted between two terminals or the test value is invariant in the event of an action carried out by terminals on the electronic coin dataset. In the method, it is determined whether the electronic coin dataset is displayed by the terminal in the payment system or whether the electronic coin dataset is returned to the central issuer entity. A method in a payment system is provided for managing electronic coin datasets, to a corresponding payment system, and to a monitoring entity.

Abstract: A secure service provider unit (SPU) in an electronic transaction system includes: a secure wallet issuing unit (TMU-IU) including control means configured to issue secure wallets (TMU-U) for users (U) in the electronic transaction system (TS). Each secure wallet (TMU-Ux) has wallet identification data (TMU-ID) assigned to a secure wallet (TMU-Ux) for uniquely identifying the secure wallet (TMU-Ux) in the electronic transaction system (TS). The control means of the secure wallet issuing unit (TMU-IU) for a secure wallet to be issued is configured to provide at least a part (TMU-ID-VAR) of the wallet identification data (TMU-ID), which is derived from external digital identification data (D-ID-Ux).

Abstract: A device for directly transmitting electronic coin data records to another device includes accessing data storage, such that an electronic coin data record is stored in the data storage; an interface at least for outputting the at least one electronic coin data record to the other device; and a computing unit configured to mask the electronic coin data record in the device by applying a homomorphic encryption function to the electronic coin data record to obtain a masked electronic coin data record for registering the masked electronic coin data record at a monitoring entity; and to output the electronic coin data record using the interface. A payment system has a monitoring layer including a database in which masked electronic coin data records are stored; and a direct transaction layer including at least two devices in which the method can be carried out.

Abstract: A payment system is provided for making a payment using electronic coin data sets, having a coin register which is designed to register the electronic coin data sets; participating units which are designed to carry out payment transactions by transmitting the electronic coin data sets and to transmit status and registration requests relating to the electronic coin data sets to the coin register; and a monitoring register which is designed to analyze monitoring data sets relating to the payment transactions. A monitoring data set includes at least one register data set and at least one transaction data set in the monitoring register. The at least one register data set is provided by the coin register, and the at least one transaction data set is provided by a transaction data set source and/or the coin register.

Abstract: The invention relates to a method for directly transmitting electronic coin datasets between terminals, wherein a first terminal has at least one electronic coin dataset, and the at least one electronic coin dataset has a monetary value and a concealment value. The method has the steps of: determining a masking mode from at least two masking modes, a first masking mode consisting of: masking the electronic coin dataset, preferably in the first terminal, by applying a one-way function to the first coin dataset in order to obtain a completely masked electronic coin dataset; and registering a masked electronic coin dataset in a monitoring entity. The invention additionally relates to a payment system with a monitoring layer using a database, which is controlled in a decentralized manner and in which masked electronic coin datasets are stored, and a direct transaction layer, which uses at least two terminals and in which the method can be carried out.

Abstract: A method is provided for directly transmitting electronic coin datasets between terminals in order to make a payment in a payment system. A first terminal has at least one electronic coin dataset, and the at least one electronic coin dataset has a monetary value and a concealment value as coin data set elements. The method has the steps of: masking a first coin dataset element of the electronic coin dataset to the first coin dataset element of the electronic coin dataset, to obtain a masked electronic coin dataset element; adding a second coin dataset element of the electronic coin dataset to the semi-masked electronic coin dataset, in order to obtain a semi-masked electronic coin dataset; and transmitting the semi-masked electronic coin dataset to a monitoring entity in order to register the electronic coin dataset.

Abstract: A method relates to a terminal for managing electronic coin datasets and to a corresponding terminal. The electronic coin datasets are output by a central issuer entity, wherein each electronic coin dataset has a test value, and the test value is incremented when the electronic coin dataset is directly transmitted between two terminals or the test value is invariant in the event of an action carried out by terminals on the electronic coin dataset. In the method, it is determined whether the electronic coin dataset is displayed by the terminal in the payment system or whether the electronic coin dataset is returned to the central issuer entity. A method in a payment system is provided for managing electronic coin datasets, to a corresponding payment system, and to a monitoring entity.

Abstract: A method for directly transmitting an electronic coin data record between first and second terminals, with the following steps carried out by the second terminal: receiving the electronic coin data record from the first terminal, wherein the at least one electronic coin data record includes a monetary amount and a concealment amount; generating a modified electronic coin data record using the received electronic coin data record; masking the modified electronic coin record by applying a homomorphic one-way function to the modified electronic coin record in order to obtain a masked modified electronic coin record; sending a registration request for the masked modified electronic coin data record to a monitoring entity. A currency system and a payment system includes a decentrally controlled database in which masked electronic coin data records are stored; and a direct transaction layer including at least two terminals in which the method can be carried out.

Abstract: A device for directly transmitting electronic coin data records to another device includes accessing data storage, such that an electronic coin data record is stored in the data storage; an interface at least for outputting the at least one electronic coin data record to the other device; and a computing unit configured to mask the electronic coin data record in the device by applying a homomorphic encryption function to the electronic coin data record to obtain a masked electronic coin data record for registering the masked electronic coin data record at a monitoring entity; and to output the electronic coin data record using the interface. A payment system has a monitoring layer including a database in which masked electronic coin data records are stored; and a direct transaction layer including at least two devices in which the method can be carried out.

Abstract: The invention relates to an apparatus and method for visually representing measuring values. The present invention starts out from the idea of veiling the visual representation of authenticity data or other measuring values by visually representing not the measuring values themselves, but camouflage data, which are formed by measuring values changed with the help of a mathematical algorithm.

Abstract: The invention relates to an apparatus and method for visually representing measuring values. The present invention starts out from the idea of veiling the visual representation of authenticity data or other measuring values by visually representing not the measuring values themselves, but camouflage data, which are formed by measuring values changed with the help of a mathematical algorithm.