METHOD FOR PAIRING A CONTENT PROVIDER SYSTEM AND A RECEIVING DEVICE, CORRESPONDING COMPUTER PROGRAM PRODUCT AND DEVICES

A method is proposed for pairing a content provider system (120) and a receiving device (110), a cryptographic function and a receiving device unique identifier being populated in the receiving device. According to such method, the receiving device executes:- obtaining (S212) a first key which is a result of a first function taking as arguments an Identity Based Encryption scheme master key owned by an authority server (100) and an output of the cryptographic function applied to the receiving device unique identifier;- receiving (S220), from the content provider system, a content provider unique identifier; and- computing (5231) a secret key which is a result of a second function taking as operands the first key and an output of the cryptographic function applied to the content provider unique identifier, the secret key being known from the content provider system.