Data transmission method between a local server and local peripherals
Example embodiments relate to a method of transmitting encrypted data between a local server connected to one or several local peripherals. The local server may include a security device in charge of acquiring a first right of use of the data. The method may include transmitting the encrypted data from the local server towards a peripheral, extracting from the first right a second right corresponding to the part necessary for the decryption of the data in the peripherals, encrypting by the security module the second right by a pairing key specific to the couple formed by the security module of the local server and the security module of the peripheral, transmitting the encrypted second right to the local peripheral, decrypting with the help of the pairing key the second right by the security device of the peripheral, and decrypting by the peripheral the data encrypted by the second right.
1. A method for transmitting encrypted data (DT) between a local server (HS) connected to one or several local peripherals, the peripherals having a security module and able to process a plurality of right messages issued by the local server (HS) encrypted data (DT), said local server (HS) includes a security module (SM) in charge of acquiring a right message including a decryption key relative to the encrypted data (DT), first access conditions relating to the local server and second access conditions relating to a peripheral, the method comprising:
transmitting the encrypted data (DT) of the local server (HS) towards a the peripheral,
extracting from the right message the second access conditions corresponding to the decryption's condition of the encrypted data (DT) part necessary for the decryption of the data (DT) in the peripherals,
encrypting by the local server's security module (SM), a second right message including the second access conditions and the decryption key, by a pairing key specific to the couple formed by the security module of the local server and the security module of the peripheral, wherein the first access condition comprises conditions of transmission towards the peripherals, and the security module of the local server restrains the transmission of the second right message depending on the first access conditions,
transmitting the encrypted second right message to the local peripheral,
decrypting with the help of the pairing key, the second message with the security device of the peripheral, and
applying the second access conditions by the peripheral's security module, and if allowed,
decrypting the encrypted data (DT) received by the peripheral by the decryption key.
2. A transmission method of encrypted data (DT) according to claim 1 , wherein the right access conditions is an operating software of the data (DT).
3. A transmission method of encrypted data (DT) according to claim 1 .
4. A transmission method of encrypted data (DT) according to claim 1 .
5. A transmission method of encrypted data (DT) according to claim 1 .