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As millions flock to Telegram, 7 Reasons to Question the App's Privacy Claims: 7 reasons why Telegram isn't as secure as it paints itself to be. Chats are not end-to-end encrypted by default, and full chat histories are stored in the cloud. Telegram collects metadata about users' conversations, including IP addresses, IP addresses and IP addresses. It can include who you talk to, when it's talking about the talking data it's about the long; it can identify members of a group chat.