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1. #DISK IMAGE .DMG DOES NOT ASK FOR PASSWORD WHEN ENCRYPTED FULL#
2. #DISK IMAGE .DMG DOES NOT ASK FOR PASSWORD WHEN ENCRYPTED PORTABLE#
3. #DISK IMAGE .DMG DOES NOT ASK FOR PASSWORD WHEN ENCRYPTED CODE#
4. #DISK IMAGE .DMG DOES NOT ASK FOR PASSWORD WHEN ENCRYPTED SERIES#

Also very important, DMGs containing sensitives files are only mounted on an as-needed basis.

#DISK IMAGE .DMG DOES NOT ASK FOR PASSWORD WHEN ENCRYPTED SERIES#

All my confidential files are typically stored this way, in a series of encrypted DMGs with separate passwords. Hidden in some obscure directory on the local machine, a network storage device, a USB drive, whatever. Doing so defeats the entire purpose of what we’re trying to accomplish, because the admin password unlocks the keychain.Ī great thing about DMGs is that they can be stored anywhere. DON’T SAVE THE PASSWORD IN YOUR KEYCHAIN. We’re talking even 6 characters or longer, some upper and lower case, and maybe toss in a digit and special character.

To ensure this, all you have to do is set a reasonable password.

If FileVault’s AES-128 crypto is already “impossible” to crack, AES-256 DMGs are exponentially more impossible. Upon creation of DMGs the level of encryption strength can be set, the highest being AES-256. double-clicked) display on the desktop like any other disk drive where files can be stored.

#DISK IMAGE .DMG DOES NOT ASK FOR PASSWORD WHEN ENCRYPTED PORTABLE#

DMGs are self-contained portable files, of customizable size, that when mounted (i.e. On OS X, Disk Utility can be used to create encrypted disk images called DMGs. Setting up this type of layered security fall-back plan is where we return to the conversation of encrypted disk images. If this should happen, ideally my data, other than email, should remain safe even after the adversary lands on my desktop. I’ll of course resist giving up my admin password to the extent I’m able, but must assume I may have to “comply” at some point. Realistically, while my brazilian jiu-jitsu black belt certainly helps in many situations, it can be utterly useless in other real-world encounters.

#DISK IMAGE .DMG DOES NOT ASK FOR PASSWORD WHEN ENCRYPTED FULL#

What is possible is law enforcement, or a robber, forcibly stopping me and “asking” for my admin password, a method capable of defeating FileVault’s full disk encryption. By all practical means, “cracking” this password is impossible. That is unless my admin password, which unlocks FileVault, is ridiculously simple, and it isn’t. Enabling FileVault means that even if someone has physical possession of my computer, or obtains a full copy of the hard drive, they’d be the proud new owner of a cutting-edge machine, but unable to get any useful data off of it. To protect against these potential physical attacks, OS X dutifully offers FileVault.įileVault is a full disk encryption feature utilizing XTS-AES 128 crypto. My computer becoming lost, stolen, or imaged by border guards and other law enforcement officers is a constant concern. More specifics than I’m normally comfortable sharing.Īs my badge wall shows, I travel a lot, all around the world, and often with the same laptop. If not, the amount of epic self-pwnage would be too horrible to imagine.īefore sharing how I got myself into this predicament, it’s necessary to reveal some details about my personal computer security habits. I somehow needed to “crack” this password. File backups? Of course! Encrypted the same way with the same password. A location where an “email me a password reset link” is not an option. The password in question unlocks these files from the protection of locally stored AES-256 encrypted disk image.

#DISK IMAGE .DMG DOES NOT ASK FOR PASSWORD WHEN ENCRYPTED CODE#

Highly sensitive and valuable files that include work documents, personal projects, photos, code snippets, notes, family stuff, etc. Without this one password I was cryptographically locked out of thousands and gigabytes worth of files I care about. Two weeks ago I was in the midst of a nightmare.