Supported mobile devices can also use Face ID, Touch ID, or device unlock. The Help Center says the feature is rolling out gradually and is available across Free, Go, Plus, Pro, Business, Enterprise, and Edu plans. OpenAI states that locking a chat does not create end-to-end encryption, change retention, or alter the “Improve the model for everyone” setting. Resetting the PIN permanently deletes locked chats and content protected only by the previous PIN. Source: https://help.openai.com/ru-ru/articles/20001411-using-locked-chats-in-chatgpt
Using locked chats in ChatGPT
In one minute
OpenAI documents Locked chats in ChatGPT, a feature that moves selected conversations out of regular history and conversation search and requires a four-digit account PIN to open.
What changed: Same event as Keep sensitive conversations out of view with Locked Chats in ChatGPT.