TH65366A - How to transmit data between the local service device and the local surrounding device. - Google Patents

Abstract

DC60 (06/11/45) The purpose of this invention is to enable the transmission of conditional access data through a home without any limitation on the type of terminal used, while ensuring that this transmission does not exceed this limitation. This is achieved by encrypting the transmission of data between a local server connected to one or more local peripherals. The local server contains a security pathway that grants the first right to use this data. The procedure involves: - Transmission of encrypted data from the local server to the peripheral; - Extraction of a second right matching the necessary decryption key from the first right on the peripheral; - Encryption of the second right by a security module using a key matching pathway specific to the pairs created by the local server's security module and the peripheral's security module; - Transmission of this encrypted second right to the local peripheral; - Decryption of the second right by the peripheral's security pathway. With the help of a matching key, the peripheral device decrypts the encrypted data using the second right. The purpose of this invention is to enable the transmission of conditional access data within a home without any limitation on the type of terminal used, while simultaneously ensuring that this transmission does not exceed this limitation. This objective is achieved by a method of encrypting data transmission between a local server connected to one or more local peripheral devices. This local server consists of a security pathway that receives the first right to use this data. Specifically, this method consists of: - Transmission of encrypted data from the local server to the peripheral device; - Extraction of the second right, which is required to decrypt the data on the peripheral device, from the first right; - Swap encryption of the second right with a security module using a matching key path specific to the pair created by the local server's security module and the peripheral device's security module; - Transmission of this encrypted second right to the local peripheral device; - Decryption of the second right by the peripheral device's security pathway with the help of a matching key; - Decryption of the encrypted data by the peripheral device using the second right.

Claims (10)

1. The method of encrypting data transmission (DT) between a local server (HS) connected to one or more local peripheral devices. The local server contains a security path. This HS contains a security path (SM) that acts as the first right (D1) to use this data (DT). The process involves: - Sending the encrypted data (DT) from the local server (HS) to the peripheral device. - Extracting the second right (D2) that matches the part required to decrypt the data (DT) on the peripheral device from the first right (D1). - Encrypting the second right (D2) using the security module (SM) via a specific pairing key created by the local server's security module and the peripheral device's security module. - Sending this encrypted second right (D2) to the local peripheral device. - Decrypting the second right (D2) via the peripheral device's security path with the help of the pairing key. - Decrypting the encrypted data (DT) received by the peripheral device. The Second Right (D2) pathway, with the need to drive such information. 2. The cryptographic transmission (DT) method under claim 1 has the special characteristic that the rights (D1, D2) are part of the operational instruction set for these data (DT). 3. The cryptographic data transmission method (DT) under claim 1 has the special characteristic that rights (D1, D2) are the decryption keys. 4. The cryptographic data transmission (DT) method, based on claims 1 through 3, is characterized by the first right (D1) encompassing the conditions for transmitting data to peripheral devices and the security module of the specific server that controls the transmission; the second right (D2) depends on these various transmission conditions. 5. The cryptographic transmission (DT) method under claim 4 is characterized by the fact that these conditions contain indications of the types of accepted peripheral devices. 6. The cryptographic transmission (DT) method under claim 4 is characterized by the fact that these conditions contain indications of the accepted security level of the peripheral devices. 7. The cryptographic data transmission (DT) method under claim 4 is characterized by conditions that contain indications of the maximum data usage (DT). 8. Cryptographic Data (DT) transmission method between a Local Service (HS) connected to one or more Local Peripherals. The HS contains a security path. This HS contains a security path (SM) that acts as the first authorization (D1) for using this DT. The characteristics of this method are: - Decryption of the DT by the HS; - Transmission of this decrypted data in unencrypted plain text from the HS to the peripheral; - Driven by the peripheral. 9. The cryptographic transmission (DT) method under claim 8 has a special characteristic: the right (D1) is a decryption key that allows only partial decryption of the DT. 10. The cryptographic data transmission method (DT) under claim 8, which has the special characteristic that claim (D1) is an executable program of data that reduces the quality of the transmitted data.