Facebook announced that it would add end-to-end encryption to all of its messaging services in an effort to better protect the privacy of its users. The announcement was supported by many human rights NGOs, noting the need to protect the right to privacy. The US, British and Australian government, however, sent a letter to Mark Zuckerburg, urging him to reconsider stating that increased encryption makes it difficult to monitor hate speech and reduce violence, abuse and the spread of terrorism online.