How to Delete a Telegram Secret Chat?

Find a chat in the list, click on it and hold until a menu with settings appears in the window. Then click on the trash can icon and confirm the deletion.
Is It Possible To Restore The Secret Chat
If you change your mind about getting rid of a chat immediately after hitting the delete button, you can change your mind within 5 seconds. A notification will appear at the bottom of the screen with the text “Secret Chat Deleted” and a “Cancel” button. Click on it and the conversation will be restored.

Otherwise, messages will be permanently deleted. The only way to save them is to copy the text manually.

General Security Settings For Telegram
Secret Chat ensures that your messages cannot be intercepted by third parties. Your task is to protect your device and account from strangers. Here are the main methods to protect the telegram account and phone.

Device Security
Auto-lock. This feature is enabled by default on modern phones. You can choose the time interval after which the phone will be lock if you are not using it. It is advisable to choose a short interval, for example 1 minute.

Login by face recognition or fingerprint. This unlock method can be select in the “Privacy” section. Activate the desire option and follow the instructions of the program – you will be ask to put your finger on the screen, look at the camera or turn to it in profile.

Product Block:
Account security
Passcode. In the “Privacy” section of the messenger settings, you can set a password to lock the application. Activate the appropriate option in the “Security” subsection, come up with a combination of 4 numbers and re-enter. After that, the application will ask for a code when trying to sign in.

Two-factor authentication. You can configure the messenger login so that the phone asks for two types of confirmations – a password and a code from SMS. You can set the settings by building a sequence of steps: “Privacy” – “Security” – “Two-step authentication” – “Set password”.
Profile Privacy Settings
Telegram allows you to hide the phone number to which your account is link – from all users or from those who are not in your contact list. You can also prevent users from:
invite you to groups and chats;
call you on Telegram;
view photos and videos of your account;
refer to your account when forwarding messages.
All this can be configure in the “Privacy” section.
Conclusions
Telegram is a messenger with a high level of security. Secret chats will help make communication even more private.
Messages from a secret chat are not store on the Telegram servers, so access by unauthorized persons is exclude.
In such a chat, it is impossible to send messages and files, to take screenshots of the screen. The only way to save a conversation is to copy its text.