Method for use in a network based safety data storage system

A method for data storage on a server in a telecommunications network, the telecommunications network providing connectivity between local computers of users and the server, the method comprising:

• issuing, upon request, by an operator of the server, to a first user of the users a user certificate for access conditions;
• providing the user certificate and a secret key to the first user;
• accessing the server over an internet;
• sending, by the server, a client program to a first local computer of the first user, the client program enabling an authentication of the first user using the user certificate and a transmission of at least one further security requirement;
• setting up a personal main folder on the server for the first user, the main folder having a first special file including a first security requirement defined for the main folder and first management information so as to provide a main locker;
• configuring the personal main folder to have at least one further folder set up therein, the at least one further folder having a function and a second file including a second security requirement defined for the least one further folder and including second management information so as to provide a functional locker;
• displaying the functional locker only if at least one security-relevant requirement is met so as to provide a locker system having a virtual character, wherein the functional locker provides a personal locker, wherein a reference to first files of the first user is storable in the personal locker only by the first user and displayable only to the first user, and at least one of:
• a provisioning locker, wherein a first reference to a different second file available to another user is storable therein only by the first user;
• and
• a receiving locker, wherein a third file of a second user of the users is storable therein only by the second user, the receiving locker being configured, when opened, to provide to the first user a sender user reference relating to the storage of the third file and to a sender user defined security requirement.