(Telecompaper) The EU's privacy regulators have expressed concerns about the proposed Privacy Shield agreement on data transfers in the US, saying its doesn't due enough to prevent mass surveillance of EU residents, reports Ars Technica. Speaking at a press conference in Brussels, the Chairman of the Article 29 Working Group, Isabelle Falque-Pierrotin, said that the privacy regulators are awaiting a forthcoming ruling by the EU Court of Justice on whether mass surveillance of citizens by intelligence services could be legal. If such surveillance is found unlawful, it would have a big impact on the national security exceptions included in the Privacy Shield. Falque-Pierrotin said that the data protection authorities also had concerns about the independence and effectiveness of the Privacy Shield ombudsperson, who will deal with complaints from Europeans about how their data has been used by US law enforcement, such as the NSA.