For years, the ex-NSA (National Security Agency) whistleblower Edward Snowden has been raising awareness about so-called secure messaging applications or programs and publically criticised apps like Skype, Google Allo, and Telegram.

In fact, NSA documents leaked by him showed how Microsoft handed over plain text Skype chats of users to the agency. But today, citing the tense situation in Iran, the whistleblower has posted a series of tweets explaining why Telegram Messenger app is unsafe and it can be secured with little effort.

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