Patent ID: 6675201
Filing Date: 2004-01-06
Classification: G06F,H04L

Abstract:
A method for downloading software from a server (128) to a terminal (100, 102), the method comprising the steps ofattaching to the software a certificate confirming the authenticity of the software manufacturer and the loader; uploading the software from a source computer (134) to the server (128); calculating a check sum for the software and the certificate; and downloading the software from the server (128) to the terminal (100, 102), characterized in that the method further comprises the steps of: generating an electronic signature at the server (128) by calculating for the software and the certificate a common check sum which is encrypted by means of a secret key of the server, attaching the check sum confirming the authenticity of the software to the software at the server (128) before the software is downloaded to terminals; generating a second check sum at the terminal from the downloaded software, after the software has been downloaded; the encryption of the secret key is decrypted at the terminal and checking the authenticity of the software at the terminal by comparing the first check sum with the second.