A method is disclosed for securely updating system attributes of a client computer with a BIOS and includes signing a public key of a secure server with a private key of the BIOS prior to completion of manufacturing of the client computer to create an encrypted public key and embedded private key stored at the server. The method includes receiving at the server a request packet transmitted from the client computer requesting system attribute modification, encrypting the request packet to create an encrypted packet, and transmitting a return packet to client computer comprising the encrypted packet, the server's public key, and server instructions. The client computer decrypts the request packet using the server's public key and compares it to the original request packet, and if identical, executes the server instructions to modify the client computer's boot block to update client computer's system attributes.