In Nirudia you can choose the license to publish your photos under.

There are three licenses to choose:

1. Free: Creative Commons BY - SA (Attribution - Share Alike): any one may use your photos but only recognizing that you are the photos author and publishing them under the same license.
2. Free with conditions: Creative Commons BY - NC - ND (Attribution - Noncommercial - No Derivative Works): As for the former one, but without permission to do any commercial use of your photos.
3. Copyright: The photo reproduction is not allowed without its author permission.

Now, the way you want to share your photos is up to you...