Method and system for transferring firmware or software to a plurality of devices

摘要

A method for transmitting a file from a file source (101) to a plurality of electronic devices (110j) is described herein. To each electronic device are associated an encryption key and a unique identifier code. According to the method described herein, to the plurality of electronic devices are transmitted: a file encrypted by means of a session key, and a plurality of encrypted session keys, each paired with a respective electronic device, with whose encryption key the respective encrypted session key was obtained; Moreover, each electronic device decrypts its own encrypted session key using the respective encryption key to obtain the decrypted session key, and decrypts the encrypted file by means of the decrypted session key.

主权项

1. A method for transmitting a file from a file source to a plurality of electronic devices, wherein an encryption key and a unique identifier code are associated with each electronic device, the method comprising:
for each transmission of a file from the file source,
generating a session key,encrypting a file using the session key, andtransmitting the encrypted fileand a plurality of encrypted session keys in a single transmission via a communication channel to each the plurality of electronic devices, wherein each of the encrypted session keys is paired with a respective unique identifier code of a respective one of the electronic devices, and wherein each of the encrypted session keys is generated using a respective encryption key associated with the respective electronic device;each electronic device selecting the encrypted session key paired to the unique identifier code of the respective electronic device and decrypting the encrypted session key paired with the unique identifier code of the respective electronic device using the respective encryption key, to obtain a respective decrypted session key; anddecrypting the encrypted file in each electronic device using the respective decrypted session key.