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Questions tagged [encryption]

the process of converting information using an algorithm (or cipher) to render the information unreadable to anyone who doesn't have the algorithm (also known as a key)

118
votes
5answers
61k views

Need a cli to check the sha256 hash of a file

To check the sha1 of a file I would use openssl sha1 <file> I'm not sure what to use to check the sha256 hash of the file however, what would you recommend?
75
votes
3answers
71k views

truecrypt 7.1a requires Mac OS X 10.4 or later on Yosemite 10.10

After reading articles about the state of Truecrypt in February 2015, I decided to download the last stable version of Truecrypt that allows full usage of Truecrypt: that is, version 7.1a 7.2 ...
60
votes
9answers
66k views

How to view progress when encrypting a disk?

Mountain Lion allows one to encrypt any disk by right-clicking on the disk in the Finder and selecting Encrypt from the contextual menu. Is there anyway to check on the progress of this encryption ...
37
votes
4answers
19k views

Why can't I paste into the password dialog when mounting an encrypted disk image?

I've got an encrypted sparse bundle disk image and I've used fstab with the right UUID to mount it someplace other than /Volumes. What I would like is to just dbl-click on it, enter the password and ...
36
votes
7answers
31k views

Email encryption options on an iPhone

I've started taking security more seriously lately. (Why only now you may ask? Because I'm a trusting fool that's why.) I've now got emails signing automatically and encrypting where I have their key. ...
29
votes
4answers
47k views

Change OSX encryption filevault password to match login pass

When I first setup my OSX laptop, my filevault and user login password were the same. At bootup, I only had to login once (with my username and password). I recently changed my OSX password but my ...
26
votes
2answers
24k views

Obtain FileVault 2 recovery key with administrator account

I enabled full disk encryption on my new MacBook Pro. (I am new to the Mac world but an accomplished Linux/UNIX and Windows type) However, I made a mistake and skipped the step of taking note of the ...
22
votes
2answers
24k views

Encrypt external USB thumb drive on MacOS High Sierra

I'm unable to encrypt an USB thumb drive on MacOS High Sierra. Although I tried different approaches, it never worked: Use Finder (right-click, then select "Encrypt Drive"): this option is not ...
22
votes
4answers
14k views

How is the System Keychain secured in OS X?

I'm looking for something either like this security white paper for iOS except for OS X or even better, some kind of security audit report from an independent expert. After reading through ...
21
votes
6answers
5k views

How can I password protect files in macOS?

I want to start a private journal on my Mac, but I want to make sure that the file can only be opened by me. How can I put password security on my file without it slowing down my computer?
21
votes
2answers
34k views

With File Vault ON are time machine backups encrypted?

I have been using time machine to back up to a wireless external drive since I got my mac. Today I used filevault to encrypt my hard drive. Will this affect how Time Machine backs up my files? Will ...
21
votes
3answers
3k views

How do I get the password hint for an encrypted disk?

I created an encrypted disk on a USB drive the other day, and added a password hint. I don't remember what the password is. (I have a scheme for mapping hints to passwords, so when there's a hint ...
20
votes
1answer
17k views

Time Machine drive encryption going for 22 hours. Is it stalled?

I set up Time Machine in Mountain Lion by plugging in a newly formatted 500GB USB drive, selecting that from the Time Machine dialog, and checking the box to encrypt my backups. A window appeared that ...
20
votes
4answers
15k views

Is a hardware-based full disk encryption possible on a Mac?

Is it possible to use hardware-based full disk encryption (perhaps on a Samsung 840 Pro SSD) on a Mac, specifically a Macbook Pro 8,2? If so, how? My understanding is that this will be handled in the ...
20
votes
1answer
2k views

APFS folder encryption?

From the feature list APFS supports per-file encryption. Hence by extension it should be possible to setup an encrypted folder (or at least just the files within that folder) with a password that is ...
18
votes
9answers
69k views

FileVault Stuck on Pause

I just got a new 13" rMBP with Yosemite installed. I chose to enable FileVault when I set the machine up. Now, several days later, an app called "Reverting from FileVault" shows on the list of apps ...
15
votes
2answers
6k views

What user behavior is necessary to make Filevault 2 maximally secure?

Situation: Filevault 2 passwords can be stolen Passware has released the Passware Kit Forensic 11.3 which is able to steal the FileVault 2 password from the RAM by performing a DMA Attack via the ...
14
votes
4answers
3k views

Tools to compress and encrypt files

I want to compress several files and encrypt them with a password if possible. Are there any build-in tools in Mac OS that provide such functionality? If not, can you recommend me a (freeware) ...
14
votes
3answers
18k views

Downsides of encrypting disk with FileVault

Is there any downside of encrypting my OS X 10.10.5 laptop via FileVault, in terms of usability? Obviously, if I lose the password I can no longer use the laptop. (out of interest is that correct, ...
13
votes
1answer
42k views

Should time machine backups be encrypted

I am new to the Mac and was setting up my Time Machine. However, it seems Time Machine also backs up information in the keychain. I was wondering if that means I should use an encrypted disk to store ...
13
votes
2answers
5k views

What are the implications in speed and battery life while using Filevault 2?

One of the neat new (though understated) features of Lion is Whole Disk Encryption. Before I flick the switch, I'd love to know what the performance impacts (speed and battery impacts) of switching ...
13
votes
3answers
40k views

How do I get rid of my encrypted iPhone backups to start from scratch?

Is there a way I can delete all my encrypted iPhone backups for which I forgot the password, so that I can start backing up from fresh? At the moment I'm stuck in this loop (below) which I can't ...
13
votes
2answers
2k views

How can I enable Time Machine encryption on the command line?

Is is possible to enable encryption for a Time Machine target disk with a script or using the command line? Is an encrypted Time Machine disk really just the same as a normal disk, full-disk-...
12
votes
4answers
43k views

How can I mount an encrypted disk from the command line?

When I type diskutil mount disk3 in the terminal, it says Volume(s) mounted successfully. However, the disk is not mounted and I can confirm this by opening the GUI of Disk Utility.app and also the ...
12
votes
3answers
6k views

TrueCrypt alternative for Mac OS X

I'd need to create an encrypted volume on my MacBook Pro running OS X El Capitan. It's been a while since I needed to do something like that, I think it was 2010 when I used TrueCrypt. I know that ...
12
votes
2answers
3k views

How can I use FileVault encryption and still track my laptop if stolen

I've spent quite some time over the last few days trying to work out how I can combine the clear data security advantages of encrypting my machine with FileVault 2 under Lion, and the theft-recovery ...
11
votes
2answers
13k views

Is File Vault 2 whole disk encryption or whole partition encryption?

Can I use File Vault to encrypt only some of the partitions on my disk (so that I can still have unencrypted and Windows partitions on the same disk), or does File Vault encrypt the whole disk so that ...
11
votes
5answers
1k views

Do I need to decrypt the hard drive before repair?

Today I left my MBP Retina at local authorised Apple service (it's a mid 2012 model, and it's having some gfx issues), and then I got an email telling me that I have to go back there and decrypt my ...
11
votes
3answers
10k views

How do I update the FileVault 2 recovery key stored in iCloud?

It's been a long saga getting to the point where I am comfortable that my new Macbook Pro has FileVault 2 enabled properly on Yosemite. I ran into the "Encryption paused - connect power adapter" ...
10
votes
3answers
21k views

How do I encrypt an external drive with FileVault 2 in OSX Yosemite

Ok, so according to https://www.apple.com/osx/what-is/security/ I should be able to encrypt ANY external drive..."with ease" using FileVault 2. I have a brand new (empty) 2TB Fantom Drive model: ...
10
votes
1answer
11k views

Truecrypt error: the OSXFUSE file system is not available (255)

My truecrypt files were mounting fine until today when I tried to mount it and I got the error: the OSXFUSE file system is not available (255). The weird thing is I honestly don't know what I could ...
9
votes
5answers
11k views

Can I use FileVault only for specific folders?

Can I set up FileVault to encrypt only specific folders inside of my Home folder but not the whole Home folder? I want to do this because it's not very convenient for me to encrypt the entire Home ...
9
votes
2answers
1k views

When does encryption actually happen in MacOS/OS X encrypted volumes?

I've noticed a sort-of lazy/post encryption strategy in MacOS/OS X with FileVault enabled and in encrypted Time Machine backups, and I'm curious when actual encryption happens. When I copy videos ...
9
votes
5answers
2k views

Portable encrypted USB stick

I would like to have an encrypted USB stick that I can use with Windows and OS X. I could format it as FAT32 and then have a encrypted image files (more than one due to the file size limitation of ...
9
votes
1answer
3k views

How can ZFS be used with encryption on OS X?

Ideals: protection of home directories should be better than in Lion (for multiple administrators: FileVault 2 alone is less secure than FileVault 1) resizing a file system should be simple and ...
9
votes
1answer
7k views

Does FileVault encrypt my BootCamp partition?

If I enable the new FileVault feature in Mac OS X Lion, will it also encrypt my existing Windows bootcamp partitions? (And/or any new bootcamp partition I create?) Update: If not, where can I get ...
8
votes
6answers
815 views

Simple encryption software for the Mac

I am looking for an application which would allow me to encrypt either a file or a folder. Something like right click on a file/folder, select Encrypt, give it a password and ready. Of course, it ...
8
votes
4answers
23k views

Open Bitlocker USB stick on OS X

I have a USB stick encrypted by Windows 7 built-in tool (bitlocker). I would like to open it on my OS X El Capitan. When I open it, all I get is a file "BitLockerToGo.exe" and another "Read Me.url" ...
8
votes
1answer
18k views

How can I reformat a drive that contains an encrypted volume?

After OS X 10.7 came out with its disk-encryption features, I encrypted an empty USB thumb drive just for grins. I never used it, and eventually decided to reformat it as a normal drive for use with ...
8
votes
4answers
2k views

Is AFP (specifically Time Machine) encrypted on the wire?

I've been hunting for the answer to this, but I have not found it. When I back up my laptop using Time Machine to a remote Time Machine server (Time Capsule, or Mac Mini with an external drive), is ...
8
votes
3answers
4k views

Speed of old Filevault vs. new Lion full disk encryption

How do the old Filevault and the new Lion full disk encryption compare speed wise? ATM I am using Snow Leppard with FileVault to encrypt my whole home directory, which makes opening IPhoto, Chrome or ...
8
votes
2answers
970 views

Encrypt External Hard Drive for Mac and Linux

I have an external hard drive that I backup with Time Machine. I'm trying to determine the best way (or if it's even possible) to encrypt it so that Time Machine can still back it up and it can be ...
8
votes
1answer
7k views

Can I decrypt a dm-crypt filesystem on OS X?

I've been an Ubuntu user for years, and I just got my first Mac. One thing I haven't yet figured out is how to decrypt my encrypted filesystem on which I store my SSH and GPG keys on my flash drive. I ...
8
votes
1answer
132 views

Is it possible to use an iPhone as an external encrypted drive accessible by iOS and any unix-based OS?

Is it possible to use an iPhone in a way that can be encrypted and accessed by both iOS and any unix based OS as an external drive? Even if additional software or tinkering is necessary in either ...
8
votes
1answer
1k views

FileVault: What exactly is the optimizing step about?

After enabling FileVault on El Capitan the partition is encrypted in a first pass. After this phase is complete a second optimizing phase is starting which takes considerably longer than the first ...
8
votes
2answers
8k views

Prompt for encrypted disk password on startup

I enabled the full disk encryption or at least I think so. The HD shows up as "Encrypted Logical Partition" in Disk Utility. When I boot up the macbook however I can choose between logging in as ...
7
votes
2answers
3k views

GUI PGP / GnuPG application

I encrypt all of my documents before storing them in the cloud with GnuPG. My wife needs access to the documents, but running gpg -d foo.pdf.gpg at the command line is annoying to her. Does anyone ...
7
votes
2answers
4k views

How to make an expanding compressed encrypted disk image?

I'd like the following setup: A DMG file sits on my HD, taking up only the space of the contents, or perhaps only the space of the contents compressed. If I double-click on it, I need to give a ...
7
votes
3answers
2k views

Is it safe to give my MacBook to a service center with my data on it? [duplicate]

I have to give my Macbook Pro to a service center for a few days to replace the display. Is it safe from the data perspective? Can they access it? (user login is password protected, but I think the ...
7
votes
1answer
6k views

“Encrypt backups” disabled for Time Machine on Mavericks; due to partition?

I picked up an external hard drive a while back and have been using it for Time Machine back-ups. Recently I thought to confirm that the disk is encrypted so that it won't be useful if someone nicks ...