One way to get insight is to check how many times the apps were downloaded. The need for a stable income stream is perfectly understandable (Telegram has way more users than Signal 9 9 9 Estimating users of an app is quite hard.
#Telegram vs signal free
The announcement explicitly committed to do it in a non-intrusive and ethical way, not to exploit users’ data, and to keep current features free of charge. However, Telegram recently announced that it will start generating revenue from advertisement in public one-to-many channels. This is good, as it implies that neither of them have a reason to monetize their users. Until last month, both Signal and Telegram were committed to be non-profit organizations, surviving on donations. Telegram keeps encrypted backups of users’ chats if they are not E2E encrypted, and it does it responsibly (access to one server does not allow to recover messages, cf. Whenever a user starts using Signal on a new device, the chat history is synced from another of the user’s devices 6 6 6 In fact, Signal does not stors backups of users’ chats on servers, but only locally on users’ devices. Signal handles this by allowing the server to keep an (encrypted) list of all current users and devices.
Hence, if a phone is lost, the content of Telegram’s Secret Chats is lost.įor the same reason such chats cannot be accessed from the web application. For this reason in our thread model we have to assume that both Signal and Telegram might be secretly backing up messages, even if in real life they are not. Telegram claims that E2E encryption cannot be extended to group chats for backup reasons: to keep the highest level of security, messages from Secret Chats are not stored after delivery 5 5 5 This is good! However, as we will see when discussing the open sourceness of the projects, we have no way to verify what really happens on the server side.
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