Blockchain is known to most people only in connection with the cryptocurrency Bitcoin. However, it is still unknown to most that secure identity management can also be made possible with the help of blockchain. ZDNet reports on our secure and GDPR compliant blockchain solution ownid. This solution is characterized by its modular character, which makes it possible to integrate the solution into existing platforms and thus offers the customer an easy possibility of online identification. Data sovereignty remains in the hands of the end user and thus enables data protection.