Sometimes, you need to protect your iPhone or iPad from prying eyes that may be accessing your device. Unfortunately, Apple does not provide an obvious and secure way to do this. However, there is a solution thanks to the Notes application.
How does it work?
You may already know about the "Hidden Photos" folder in the Photos app on iPhone and iPad. On iOS 14 and iPadOS 14, you can also hide this folder. However, images hidden in the Photos application are not password protected. There are other ways you can hide your private photos, but they often involve third-party applications.
We'll show you how to use the Notes app (available on every iPhone and iPad) and a feature first introduced in iOS 9.3 to "lock" some photos to your device. First you need to enter your photos in a note and then you can lock them with a password.
How to password protect your photos using Notes
If the photos you want to password lock do not already exist on your iPhone or iPad, move them there. Then open the Notes app and tap the New Note icon (pencil and paper) to create a new note.
In the first line of the new note, enter some text that will not attract too much attention. This will appear in the list of notes, even after the lock.
Click the Add Photo icon on the toolbar. On an iPad, you will find it at the top. On an iPhone, it will be located either above the on-screen keyboard or at the bottom of the screen.
In the menu that appears, click "Choose Photo or Video".
In the following screen, tap the thumbnail of each photo you want to add (a check mark will indicate that they have been selected). When done, click "Add".
Notes will insert the photos you selected into the note file. To lock the note, tap the Ellipsis icon (the three dots in a circle).
In the window that appears, click "Lock".
If you have previously set a note password, you will be prompted to enter it. After you do, press "OK".
Did not set a password? No problem! The notes will ask you to create one. Just remember, you must use this password to view all locked notes. If you have enabled application Notes for synchronization with iCloud, the same password will apply to other Apple devices connected to iCloud.
Enter a password and a hint. If your device supports it, you will also have the option to lock Notes using it touch ID or the Face ID. After entering your details and making your selections, press "Done".
The notes will confirm that the lock has been added, but the process is not over here! This only activates regulation of the lock - you must lock the note to secure it.
To do this, open the note, and then tap the padlock icon on the toolbar.
Then you will see one confirmation which states “This note is locked”. If you want to double check, just click "View Note".
When Notes asks for your password, enter it, and then press OK.
You will then see all the photos you added to the secure note.
Also, make sure that you visit the Photos application and delete the images protected by password. After that, you need to go to the "Recently Deleted" folder in Photos and delete them there as well.
Photo source: howtogeek.com