Encryption
Encryption is the method by which information is converted into secret code that hides the information’s true meaning. The science of encrypting and decrypting information is called cryptography. In computing, unencrypted data is also known as plaintext, and encrypted data is called ciphertext.
Cryptomator
Mountain Duck
Mountain Duck lets you mount server and cloud storage as a disk in Finder on macOS and the File Explorer on Windows. Open remote files with any application and work like on a local volume.
It supports the Cryptomator Vaults - Transparent client-side encryption using Cryptomator interoperable vaults.
Password
KeePass https://haikebang.com/passphrase.html
Saferoom
https://cn.apkjam.com/60s/saferoom.html