Abstract: A method involves registering of a token in an electronic payment transaction system, and a token reference register. A secure transaction unit and an electronic transaction system, such as an electronic payment transaction system, involves aspects of the method and token reference register.

Abstract: A secure wallet service unit includes: at least one electronic currency wallet for a user of an electronic currency transaction system, where the electronic currency wallet is hosted on the secure wallet service unit; and at least one smart contract execution unit for executing at least one smart contract, with each smart contract being hosted on the secure wallet service unit. Each smart contract contains a smart contract code and a smart contract electronic currency wallet assigned to it. The smart contract electronic currency wallet is designed to facilitate at least one electronic currency transaction within the electronic currency transaction system.

Abstract: A secure payment transaction device, includes one or more monetary value tokens of a monetary value token system; a monetary value token management unit adapted to directly exchange monetary value tokens in transactions of the monetary value token system; an updating unit for updating data of the secure payment transaction device. An online authentication information of an online digital money system can be added to the secure payment transaction device via the updating unit thereby enabling use of the secure payment transaction device in the online digital money system.

Abstract: A secure digital currency service unit includes a digital currency wallet for a digital currency of a digital currency system; a creation unit configured to create a smart contract in a separate blockchain structure. The separate blockchain structure includes a smart contract for a digital asset, and the digital asset is assignable to a blockchain account of the separate blockchain structure. A digital currency asset management unit of the secure digital currency service unit manages a digital currency asset type in the blockchain structure. The smart contract includes one or more of the digital currency assets of the digital currency asset type, and the digital currency wallet is a collateral digital currency wallet holding the digital currency of the digital currency system as collateral for one or more digital currency assets in the smart contract.

Abstract: A secure transaction unit includes means for receiving and transmitting one or more tokens; and control means configured to cause a direct exchange of one or more tokens with one or more other secure transaction units in the electronic transaction system, and to send one or more registration requests including token references to a token reference register of the electronic transaction system for registering the tokens in the electronic payment transaction system. Each token reference includes the monetary value of the assigned token, a public key corresponding to the private key of the token-individual key pair, and the token-type information of the assigned token as token reference elements and wherein each token reference being uniquely assigned to a token.

Abstract: A secure digital currency server, includes an external transaction manager for external digital currency transactions to other digital currency systems, including an external digital currency transaction from the first digital currency system to a target digital currency system using a target digital currency. The external transaction manager is configured to receive a list of exchange candidates from an exchange directory server and to determine at least a first digital currency exchange unit of the exchange candidates. The external transaction manager is configured to provide a transaction route from the first digital currency system via one or more digital currency exchange units of the exchange candidates, including the first digital currency exchange unit, to the target digital currency system.

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 token register of an electronic token transaction system, includes a token register storage unit for registering/deleting at least one token of the electronic token transaction system, a token registration/deletion request receiving unit for receiving at least one token registration/deletion request from at least one user or from at least one external token registration/deletion check system, a providing unit for providing at least one token registration/deletion check request to at least one external token registration/deletion check system, and a receiving unit for receiving at least one token registration/deletion check response from the at least one external token registration/deletion check system.

Abstract: The invention relates to a secure transaction unit for use in an electronic token transaction system, the secure transaction unit at least comprising: a secure element; and a special secure element for temporary offline storing of history data related to tokens being transacted within offline token transactions; wherein the secure element receives at least one token from another secure element when performing an offline token transaction between the secure element and the other secure element; wherein the special secure element receives directly or indirectly history data related to the received at least one token from the other secure element for temporary offline storing of history data related to the token transaction performed by the secure element; and provides the temporarily stored history data to a token register.

Abstract: A secure transaction unit is for receiving transactions from another secure transaction unit in an electronic payment transaction system. The secure transaction unit includes means for transmitting communication registration data to a remote connecting unit for registering the secure transaction unit at the remote connecting unit via a first communication channel and means for transmitting a request for transaction to the other secure transaction unit via a second communication channel. The request for transaction includes an identification information; means for receiving information from the remote connecting unit for establishing a direct communication channel to the other secure transaction unit; means for receiving transaction from the other secure transaction unit via the direct communication channel.

Abstract: A secure element for providing electronic second-type tokens, and includes an electronic first-type token having a monetary value. The secure element is configured to: generate an electronic second-type token based on the electronic first-type token, wherein the monetary value of the generated electronic second-type token is equal to the monetary value of the electronic first-type token; split the generated electronic second-type token into two or more electronic second-type tokens, a split electronic second-type token of the split electronic second-type tokens having the defined monetary value; and send to the second secure element the split electronic second-type token having the defined monetary value.

Abstract: A secure transaction unit, a token reference register, and an electronic transaction system provided, as well as a method for registering tokens in a token reference register.

Abstract: A coin management unit of a user, includes: an execution unit for managing digital coin datasets of a digital central bank currency system. The execution unit is adapted to exchange digital coin datasets with other coin management units in transactions and to send registration demands to a coin register of the central bank; and at least one digital coin dataset. The coin management unit is adapted to store conditional transactions as data elements, wherein a transaction is executed when a condition of the stored conditional transaction is satisfied. The coin management unit is further adapted to store the conditional transactions with different read and/or write. A corresponding is associated with a digital central bank currency system.

Abstract: A low security level transaction unit is provided for managing transactions in an electronic transaction system, with the transactions including a token exchange. The transaction unit includes means for receiving one or more tokens from another transaction unit in a transaction within the electronic transaction system; and means for permanently storing a security level indicator, the security level indicator is configured to indicate the low-security level of the low-security level transaction unit. The security level indicator is transmitted prior to a token exchange with the other transaction unit in an offline transaction scenario.

Abstract: A coin deposit managing unit includes a secure execution unit for managing digital coin data sets of a central bank. The secure execution unit is adapted so as to exchange digital coin data sets with coin managing units and transmit registration requests to a coin register of the central bank. A first coin deposit, which comprises at least one first digital coin data set, and a second coin deposit, which comprises at least one second digital coin data set. The coin deposit managing unit manages coin deposits of different users. The first coin deposit comprises a first functional specification which checks the secure execution unit when managing coin data sets, and the second coin deposit comprises a second different functional specification which checks the secure execution unit when managing coin data sets.

Abstract: A secure transaction unit for managing payment transactions in an electronic payment transaction system, includes: means for receiving and transmitting one or more tokens to one or more other secure transaction unit in the electronic payment transaction system to cause an exchange of the one or more tokens between secure transaction units in the electronic transaction system; and means for transmitting one or more registration requests to a token reference register of the electronic transaction system. The disclosure also relates to a token reference register, an electronic transaction system, and a method for registering tokens in a token reference register.

Abstract: A method involves registering of a token in an electronic payment transaction system, and a token reference register. A secure transaction unit and an electronic transaction system, such as an electronic payment transaction system, involves aspects of the method and token reference register.

Abstract: A secure execution unit for managing digital coin data sets is adapted to exchange digital coin data sets with other coin managing units in transactions and transmit registration requests to a coin register; and at least one digital coin data set. The secure execution unit is additionally adapted to check a first requirement and/or a second requirement for a transaction; the first requirement and the second requirement are stored in the coin managing unit as requirement data elements; and the first requirement and the second requirement pertain to the same check criterion. The second requirement is an increase of the first requirement and/or the second requirement being checked for a different exchange direction than the first requirement.

Abstract: The invention relates to a method for replacing an electronic token used in an electronic payment transaction system, the method comprising steps each being performed by a secure element of the payment system. The invention also relates to a method for replacing an electronic token used in an electronic payment transaction system, the method comprising steps each being performed by a special secure element of the payment system. The invention further relates to a special secure element.