Open the Gallery app or the app where you've hidden the photos. 2. Navigate to the "Private" or "Hidden" album (the exact naming can differ depending on the device or app). 3. You'll be prompted to enter a password, PIN, or use your fingerprint to access the private photos. 4. Once authenticated, you can view your hidden photos. Warning: Attempting to access someone else's private photos without permission breaches privacy and is ethically and potentially legally wrong.