What latest trends in steganographg becouse i need it in my study in computer science

If you are connected to a university, check your university library's set of databases. If your library has Web of Science, you are in luck. WoS covers all the sciences and humanities, and it covers only the top journals (still quite a large number) in all those fields.

Go into the database and do a "basic search" on the term steganography. I did it just now, and there are 1320 references where the term appears in the title, and 2997 references where it is a topic term. (Limiting to title may get you more articles that are dealing more extensively with the concept.)

These are sorted from most to least recent, so you should be able to get a good look at all the major topics being researched in association with steganography.

If you find a particularly interesting article, you can then go back into WoS and search on "cited reference search" rather than "basic search." Enter the name of the article's author, and you will see all the articles that have cited that article SINCE it was published. Obviously, there won't be many cites for very recently published articles, but if you find a major article several years old, then you can see how that topic has been brought forward to the present--the further work--by seeing the articles that have cited the original article since it was published.

With these capabilities, you should be able to find out easily what topics are are hot these days in steganography.