Access or acquisition system

An access or procurement system for controlling access to a location or object or technical system, or the procurement of goods or services, or the execution of a technical process in general, wherein the access or procurement system has at least one device (V1, V2, V3) for data exchange and a database (DB), wherein the device is designed that

• the device can access data in or from entries in a blockchain,
• the device can execute transactions using this blockchain or data derived from it by exchanging a signal in the form of a crypto value with a crypto wallet (K, S2) requesting access, procurement, or execution,
• the device can determine the wallet address (WA) of a crypto wallet (K, S2) involved in such a transaction,
• the device can determine whether the crypto wallet (K, S2) with the wallet address (WA) determined in this way has at least one unique crypto value whose identification code can be found in the database (DB), whose entries correspond to the identification codes of unique crypto values, whereby these unique crypto values registered in this database represent a license for the exercise of a right of access or procurement or execution by the crypto wallet (K, S2) seeking access, procurement or execution, provided that it the crypto wallet (K, S2) has a unique crypto value registered in the database (DB), and
• if the license is available, it the device can execute accessing a location or object or technical system, or the procurement of a good or service, or the execution of a technical process.