Computer services, namely, providing a digital stock ledger for shareholders and companies issuing company shares, enabling transfer of stock between shareholders, facilitating shareholder meetings, enabling shareholder voting; Software-as-a-service (SaaS) for providing a digital stock ledger for shareholders and for companies issuing company shares, guaranteeing non repudiation of ledger events, enabling stock transfers between shareholders, facilitating shareholder meetings and voting, enabling subscriber authentication via a mobile application, enabling subscribers to provide cryptographic digital signatures