G - Physics – 06 – F
Patent
G - Physics
06
F
G06F 21/22 (2006.01) H04L 9/00 (2006.01)
Patent
CA 2400204
A method and system for secure downloading of software includes a master processor for receiving downloaded blocks of code which are associated with a computed authentication signature derived from the content of the code block. A secure processor re-computes the authentication signature fromt he content of the downloaded code block and compares the computed signature to that received with the code block. If the signatures do not match or if no signature is appended to the downloaded data, the secure processor determines that the code is from an authorized sender or has been altered during transmission, perhaps to include a virus. The secure processor then takes appropriate protective action.
L'invention concerne un procédé et un système destinés au téléchargement sécurisé de logiciel, comprenant un processeur de commande destiné à recevoir des blocs de codage téléchargés associés à une signature d'authentification informatisée obtenue à partir du contenu du bloc de codage. Un processeur sécurisé recalcule cette signature d'authentification à partir du contenu du bloc de codage téléchargé et compare cette signature à celle reçue avec le bloc de codage. Si la signature ne correspond pas ou si la signature est annexée aux données téléchargées, le processeur sécurisé détermine que le code provient d'un expéditeur autorisé ou qu'il a été modifié durant la transmission, probablement afin d'inclure un virus. Le processeur sécurisé prend alors les mesures de protection appropriées.
Booth Robert C.
Goffin Glen Peter II
General Instrument Corporation
Gowling Lafleur Henderson Llp
LandOfFree
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