Telegram is an instant messaging program that allows you to send text, images, videos and also any other files to other Telegram users.
Telegram has some spyware features in it such as the telephone number verification, and routing communications through official Telegram servers in most cases. However, Telegram contains privacy features and claims to not collect any user information.
Telegram features the more modern spyware feature that requires the user to associate their persistent user identity with a telephone number. This is obviously a breach of privacy, because Telegram requires the user to disclose this personal information.
Telegram's server software is closed source and Telegram does not distribute its server software. There is no way for other people to host their own Telegram services because of this, meaning that the servers that the developers operate are the only choice for using this messaging platform.
Telegram clients are advertised as free software, but in practice the source code is not immediately accessible, the delay sometimes being up to 5 months. So, unknown spyware features could be in the official Telegram client binaries that you download, without you knowing. It's recommended that you build an outdated version of telegram from its source code, since it's not provable whether or not the binaries that are distributed have unknown spyware or not.
2. Where are the sources of the latest releases? [archive.li]
This article was last edited on 2/18/2019
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