In an article on the right to enjoy the benefits of scientific progress and its applications (Article 15) just published in Science authored by Audrey Chapman and Jessica Wyndham
Science 14 June 2013: Vol. 340 no. 6138 p. 1291 DOI: 10.1126/science.1233319
it is stated:
In addition, Article 15 directs states to recognize the benefits of international contacts and cooperation in scientific and cultural fields. It is disturbing that many governments are increasingly blocking or filtering Internet content and restricting academic freedom (10). It is also a concern that national security justifications are given for sometimes overzealous and unnecessary restrictions on the freedom of scientists to collaborate internationally (11).