_دکتر محمدرضا فرزانه دبیر هاب علمی تغییر اقلیم کشور عضو هیات علمی و مدیر گروه مهندسی محیط زیست پژوهشکده محیط زیست و توسعه پایدار سازمان حفاظت محیط زیست
_دکتر مهدی خادم ثامنی مدیر کل دفتر مدیریت پسماند سازمان حفاظت محیط زیست
_دکتر ناصر مهردادی عضو هیئت علمی و رئیس دانشکده محیط زیست دانشگاه تهران
_دکتر علیرضا پرداختی هیئت علمی دانشکده محیط زیست دانشگاه تهران
_دکتر محمدرضا فرزانه دبیر هاب علمی تغییر اقلیم کشور عضو هیات علمی و مدیر گروه مهندسی محیط زیست پژوهشکده محیط زیست و توسعه پایدار سازمان حفاظت محیط زیست
_دکتر مهدی خادم ثامنی مدیر کل دفتر مدیریت پسماند سازمان حفاظت محیط زیست
_دکتر ناصر مهردادی عضو هیئت علمی و رئیس دانشکده محیط زیست دانشگاه تهران
_دکتر علیرضا پرداختی هیئت علمی دانشکده محیط زیست دانشگاه تهران
Groups are also not fully encrypted, end-to-end. This includes private groups. Private groups cannot be seen by other Telegram users, but Telegram itself can see the groups and all of the communications that you have in them. All of the same risks and warnings about channels can be applied to groups. "The result is on this photo: fiery 'greetings' to the invaders," the Security Service of Ukraine wrote alongside a photo showing several military vehicles among plumes of black smoke. Telegram does offer end-to-end encrypted communications through Secret Chats, but this is not the default setting. Standard conversations use the MTProto method, enabling server-client encryption but with them stored on the server for ease-of-access. This makes using Telegram across multiple devices simple, but also means that the regular Telegram chats you’re having with folks are not as secure as you may believe. But Telegram says people want to keep their chat history when they get a new phone, and they like having a data backup that will sync their chats across multiple devices. And that is why they let people choose whether they want their messages to be encrypted or not. When not turned on, though, chats are stored on Telegram's services, which are scattered throughout the world. But it has "disclosed 0 bytes of user data to third parties, including governments," Telegram states on its website. For example, WhatsApp restricted the number of times a user could forward something, and developed automated systems that detect and flag objectionable content.
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