System for method for secured logging of events

A method for secured logging of a second event comprising

• in a system that comprises a logging device having a logging device private key and a logging device public key and a first set of data related to a first logged event, and a triggering device having a triggering device private key and a triggering device public key and means to create a second event message, wherein the method comprises:
• receiving, by the triggering device, an input related to the second event;
• creating, by the triggering device, the second event message based on the received input related to the second event;
• receiving, by the triggering device, the first set of data related to the first logged event from the logging device;
• creating, by the triggering device, a first position-lock data based on the received first set of data;
• creating, by the triggering device, a second append request, the second append request comprising
• the created second event message;
• the first position-lock data;
• the triggering device public key and
• a triggering device signature over a triggering commit;
• providing, by the triggering device, the created second append request to the logging device;
• verifying, by the logging device, the second append request and if verification positive then
• creating a logging device signature over a second log-append-approval;
• combining the created logging device signature over the second log-append-approval with the provided second append request to create a second logged event;
• storing a second set of data related to the second logged event in a chronological order after the stored first logged event;
• and
• providing the second logged event to the triggering device as a receipt of a transaction in response to the second append request.