Access to data broadcast in encrypted form based on blockchain

A computer program product for controlling access to data being broadcast over a telecommunication medium, the computer program product comprising a computer readable storage medium having program instructions embodied therewith, the program instructions executable by a computing structure to cause the computing structure to perform a method comprising:

• submitting, by an access device, a first access request for accessing the data by the access device to a plurality of validator devices,
• validating, by each of the validator devices, the first access request according to corresponding entitlements to access the data being granted by a provider system to a plurality of access devices,
• updating, by the validator devices, a blockchain comprising a sequence of blocks linked to each other according to corresponding hashes, by adding a new one of the blocks comprising an indication of the first access request in response to a consensus at least partial of the validator devices to a positive result of said validating the first access request,
• transmitting, by the provider system, cryptographic information to the access device in response to the new block,
• encrypting, by the provider system, the data into encrypted data according to the cryptographic information,
• broadcasting, by the provider system, the encrypted data,
• receiving, by the access device, the encrypted data being broadcast by the provider system, and
• decrypting, by the access device, the encrypted data into the data according to the cryptographic information in combination with a local key from a drive of the access device.

A structure for controlling access to data being broadcast over a telecommunication medium, the structure comprising a provider system, a plurality of access devices and a plurality of validator devices, wherein:

• each of the access devices has a circuitry for submitting an access request for accessing the data by the access device to a plurality of validator devices,
• each of the validator devices has a circuitry for validating the access request according to corresponding entitlements to access the data being granted by a provider system to a plurality of access devices,
• each of the validator devices has a circuitry for updating a blockchain, comprising a sequence of blocks linked to each other according to corresponding hashes, by adding a new one of the blocks comprising an indication of the access request in response to a consensus at least partial of the validator devices to a positive result of said validating the access request,
• the provider system has a circuitry for transmitting cryptographic information to the access device in response to the new block,
• the provider system has a circuitry for encrypting the data into encrypted data according to the cryptographic information,
• the provider system has a circuitry for broadcasting the encrypted data,
• each of the access devices has a circuitry for receiving the encrypted data being broadcast by the provider system,
• each of the access devices has a circuitry for a storage drive, and
• each of the access devices has a circuitry for decrypting the encrypted data into the data according to the cryptographic information in combination with a local key from the storage drive.