A microchip for a computer configured to connect to at least one network of computers. The microchip includes at least a first internal hardware firewall configured to deny access to at least a first protected portion of said microchip from said network, and at least one general purpose microprocessor including at least two general purpose core or general purpose processing units. At least a first core or processing unit is located within the first protected portion of the microchip. At least a second core or processing unit is located within a second portion of the microchip that is not protected by at least said first internal hardware firewall. At least the second core or processing unit is separated from the first core or processing unit by at least the first internal hardware firewall and is located between at least the first internal hardware firewall and the at least one network.