
Step 1: Right-click on the folder and select the Add to archive.

Occasionally you may wonder if it's possible to lock a folder containing sensitive data. Now one needs to enter the password to unlock the Folder link.For data security, we usually set password to lock a sensitive Word/Excel/PDF document.Encryption, decryption, and key derivation are all performed by the SubtleCrypto API. Link Lock uses AES in GCM mode to securely encrypt passwords and PBKDF2 and salted SHA-256 (100,000 iterations) for secure key derivation. You can use a free 3rd party tool named Link Lock by Jacob Strieb. The tool is free and ad-free, built for open source use.

Password Protect Folder Using a 3rd Party Tool This is the best encryption method to lock your folder or file in iCloud. I tried all the 3rd party tools and tricks to check if there is any loophole, and I found none.

The only catch here is the folder needs to be compressed into a zip file, and then you can encrypt the zip and upload the zip to iCloud. You can directly encrypt the folder and then upload it to iCloud Drive, and when someone downloads the folder or files, they need to enter the password to unlock the folder. If you want to protect the folder content even if someone has access to the iCloud link. It is the best encryption method available. Password Protect Folder Before Uploading to iCloud
