CoverDrop employs end-to-end encryption (E2EE) between sources and journalists to protect the confidentiality of the message content. In addition, all users of the news app regularly send cover messages to the news organization to hide the communication patterns of sources. Finally, CoverDrop uses plausibly-deniable encryption to conceal any previous usage of CoverDrop, even against adversaries that capture the smartphone and ask the user to unlock it.| www.coverdrop.org