Patent ID: 8806208

Claim:
A method, in a client device, for enabling at least one user to consume content provided by a content provider, the content provider capable of operating in a digital rights management system; the method comprising: assembling, in at least one message, a request for rights for consuming content and indicating in the request which content; determining if an upgrade key associated with the content is present in the client device; in response to determining that the upgrade key is present in the client device: including in the request an identifier of an upgrade key that is associated with the content; sending the request, including the identifier of the upgrade key, to the content provider; receiving, from the content provider, a response comprising a rights object encrypted by using at least the upgrade key; decrypting the encrypted rights object using the upgrade key; and starting to use the rights object for consuming the content; wherein the upgrade key is a group upgrade key; wherein the at least one user belongs to a group to which the group upgrade key is associated.