That’s why Telegram Secret Chats never show message content in push notifications. Since 2013, Secret Chats have remained the most secure usable way to communicate. US gov funded Signal has too many questionable dependencies on other US companies (AWS, MS, Intel SGX…)
🚨 BREAKING: The FBI has successfully extracted deleted Signal messages from a suspect's iPhone via notification storage, the place where all your notifications are stored for up to one month.
Notification storage stores data from all messaging apps, it's a big flaw in iOS. But there's a way to turn it off...