Contact authentication is an optional feature and serves as an additional security layer. It allows you to identify your contact for your chat session. To do so, you must provide a “question” and a “secret,” used for two-way authentication on each chat session.
Next, you must communicate the “secret” to the other chatter.
This process can be done on your contact’s side as well. In this case, he must communicate the “secret” to you.
Create Question and Secret
To authenticate a contact to your chat, follow these steps:
1. Open your contact list and tap the selected contact you wish to have an encrypted chat with. The Chat screen appears on display, with a red padlock icon on top which means that no authentication is applied yet.
2. Start typing, and the chat session gets encrypted.
3. Tap the padlock, which is now green, meaning your chat is encrypted.
4. The “OTR Authorization” panel opens, and it prompts you to compose your question and secret.
OTR authorization in Secure Chat app
When you send the OTR Authorization question and secret, the opposite party is prompted to provide the secret you created.
Upon success, you establish an encrypted chat session.
The chat session is now encrypted and authenticated.You can recognize that a chat session is authenticated by observing the padlock icon: it is now displayed in darker color with a green check mark .