A special case of electronic security (electronic security pursuant to section 4 (1) of the German Securities Trading Act (eWpG)) and does not constitute a central register security (central register security pursuant to section 4 (2) of the German Securities Trading Act (eWpG)). In contrast to digital assets such as cryptocurrencies and security tokens, the custody of which requires a license for crypto custody business (crypto custody pursuant to Section 1 (1a) sentence 2 no. 6 KWG), the custody of crypto-securities falls under custody business.