2022
https://te.legra.ph/SHifrujsya-gramotno-Vybiraem-messendzher-dlya-bezopasnoj-i-privatnoj-perepiski-CHast-2-11-23
https://te.legra.ph/SHifrujsya-gramotno-Vybiraem-messendzher-dlya-bezopasnoj-i-privatnoj-perepiski-01-06
2021
https://habr.com/ru/news/t/592515/
    ! FBI
2016
Why Your Favorite Messanger Should Die
    https://habr.com/ru/post/272937/
    ! need to read