A method of making digital content assets (ASSET#1 to ASSET#n) available at a user station 14.1 comprises protecting each asset with a respective unique encryption token (KEY#1 to KEY#n), so that a respective associated token is required to decrypt the protected asset for rendition. The protected assets are distributed to a plurality of distributed user stations 14.1 to 14. n to be pre-stored in the protected form in a respective local data storage device 22. Upon receipt at the backend 12 of user generated data 31 comprising selection data relating to an asset, the backend processes the received data and if the data complies with a first set of rules, forwards to the user station, the respective associated token 33 required to decrypt the selected asset for rendition on a renderer device 18.1 according to a second set of rules.