Despite Telegram's origins, its approach to users' security has privacy advocates worried. For example, WhatsApp restricted the number of times a user could forward something, and developed automated systems that detect and flag objectionable content. Stocks dropped on Friday afternoon, as gains made earlier in the day on hopes for diplomatic progress between Russia and Ukraine turned to losses. Technology stocks were hit particularly hard by higher bond yields. READ MORE In the United States, Telegram's lower public profile has helped it mostly avoid high level scrutiny from Congress, but it has not gone unnoticed.
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