I’d like to suggest an optional security feature for ChatGPT: a user-defined passphrase that must be entered before ChatGPT begins processing a new session or provides access to personalized conversation context.
For example, if a user leaves ChatGPT open on an unlocked computer and someone else starts using it, ChatGPT currently has no reliable way to determine whether the person typing is actually the account owner. An optional passphrase could provide an additional layer of protection in this situation.
A possible implementation could work like this:
- The user enables “Require passphrase” in ChatGPT’s privacy/security settings.
- The user creates a passphrase that is handled by the authentication/security system rather than stored as ordinary conversation memory.
- When a new session begins, ChatGPT asks for the passphrase before responding to the user’s request.
- The user can choose when authentication is required—for example, at the beginning of every session, after a period of inactivity, or whenever ChatGPT is reopened.
It could also optionally protect access to personalized memory/context separately, so that someone with temporary physical access to an unlocked device cannot simply ask ChatGPT questions about the account owner’s previous conversations or preferences.
This would be particularly useful for people who use ChatGPT on shared computers or who may occasionally leave an authenticated session open while stepping away from their device.
The key benefit is that it would provide explicit authentication instead of relying on ChatGPT to infer who is typing from writing style or conversation history, which cannot be guaranteed to identify the account owner correctly.