In this paper, a novel secure client side watermarking scheme is proposed. We illustrate the reasons why a traditional watermarking scheme may not suit for a large digital-content broadcasting service and the ways how to fix the associated problems, in the proposed approach. Since the newly proposed scheme can support both visible and invisible watermarks, it is applicable to Cloud-based digital-content broadcasting services, such as Bookstores in Amazon and Google, iTunes in Apple, and Streaming Media in Netflix.