Is Telegram secret chat safe?

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Tags

1. #encrypted
2. #local
3. #messengers
4. #telegram
5. #windows
6. #secret
7. #chats
8. #whatsapp
9. #optional
10. #phone
11. #paranoid
12. #completely
13. #secure
14. #encryption
15. #sicher
16. #storage
17. #android
18. #threema
19. #security
20. #about