Choose the folder you want to lock, select read/write for the Image Format, select the 128-bit AES encryption from the Encryption tab, set a strong password, and Save. To do that, open the utility and select New Image > Image from Folder. If you’re sharing the file online, make sure that you send the password through a different communication method to the one used to send the file in case it's compromised. The best way to lock a folder on Mac is through Disk Utility. Sometimes, you might want to give someone access to an encrypted file, which would require you to share your encryption key.
Preferably, it'll be separate from the one you use to manage your logins. If you’re encrypting more than a handful of files and it’s becoming harder to remember their passwords, it’s time you use a password manager. Similar to login passwords, the keys you use to encrypt your files need to be different, encryption to encryption. On its own, it’s an excellent security measure that can stop and frustrate most attackers.īut stopping there means you're missing out on a lot of the benefits file encryption offers. Encrypting a file or folder is equivalent to padlocking a room or box you want to secure.
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