sentences:  A conference was also held in Johannesburg, South Africa in July 2006, where representatives from the Centers of Excellence shared their experiences with representatives from key African media and nongovernmental and women's organizations.In September 2015, the IWMF released a free mobile security app designed for journalists.The app was received critically by security experts because the app was closed-source; the IWMF has not published the reports of the audits that it claims to have done; the IWMF has access to the contents of the messages that are sent with the app as well as the locations of its users; and because the app's privacy policy states that the IWMF reserves the right to share this data with a wide variety of third parties, respond to subpoenas and court orders from an unspecified number of jurisdictions, and to modify the privacy policy at any time without prior notice to the app's users.