At present, there are not many applications of information hiding and digital watermarking, and several related companies in China are doing it. If you must go to such enterprises, you can consider going to Huawei, ZTE, Thomson, Aidid, Sony, Philips and so on. For details, please refer to the website of China Film and Television Copyright Management Forum, where some companies do some related research, such as copyright protection. But because there are not many applications, most of them may go to some related enterprises, such as information hiding, which generally deal with images and videos, so they go to companies like images and videos. In fact, it doesn't matter if you just study for a master's degree. If you have time to study for a doctorate, you can also consider going to some big companies, which have some related businesses.

Domestic universities in this direction are: Sun Yat-sen University, Teacher Huang; Beijing University of Posts and Telecommunications: Teacher Yang Yixian, Shanghai University: Teacher Wang; Harbin Institute of Technology: Teacher Yao Hongxun, Teacher Niu, etc.

At present, most universities have research in this field, and there are quite a few.