Password based security method, systems and devices

A method for secure execution of an application by an authorized user on a first user device, said method comprising the steps of:

• providing a user name to a first database system via a first connection;
• initiating by said user name providing, transmitting from said first database computer system a first code to the user, said first code to be provided to said first user device;
• transmitting by said first user device said first code to said first database computer system;
• initiating by this transmission, transmitting via said first connection, a second code to said first user device, said second code being unique for the combination user and first database computer system;
• transmitting, via a second connection, different than said first connection, by said first user device said second code to a second database computer system, physically separate from said first database computer system;
• initiating by said second code transmission (after comparing with a stored fifth code), transmitting from said second database computer system a stored third code to said first user device, said third code being necessary for executing an application solely by the corresponding authorized user of said first user device.