METHODS AND DEVICES FOR CHECKING THE VALIDITY OF A DELEGATION OF DISTRIBUTION OF ENCRYPTED CONTENT

Checking a certificate of delegation, from a first server to a second server, for delivery of content referenced on the first server, and addressed to a client terminal. The terminal: emits a first message requesting the content, addressed to the first server, via a first encrypted connection; receives a redirection message from the first server, including an identifier of a third-party server; obtains an address from the second server, based on the identifier received in the redirection message; emits a request to establish a second encrypted connection between the terminal and the second server, including an identifier of the first server; receiving a certificate of delegation signed by the first server from the second server, via the second encrypted connection; verifies the certificate by an encryption key of the first server; and if valid, emits a second message requesting content, addressed to the second server, via the second encrypted connection.