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Questions tagged [efs]

Encrypting File System (EFS) is a Windows feature providing filesystem-level encryption.

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How is EFS key protected and unprotected when Windows Hello PIN is used?

EFS private key is normally encrypted by users Windows password, but when PIN (and TPM magic) is used to sign user in using Windows Hello, the user's passphrase is not used at all…so how can Windows ...
mmja's user avatar
  • 93
0 votes
0 answers
485 views

EFS-encrypted files not lost when domain admin resets password

There are many articles out there stating that a user's encrypted files are lost after an administrator resets the password of that user. I tried: Logged on as user (Domain User) with password 54321 ...
TomS's user avatar
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3 votes
3 answers
730 views

Does EFS protect against data theft by ransomware?

Recent ransomware events often include data theft in addition to just encrypting data. The Encrypting File System on Windows Pro/Enterprise editions encrypts individual files using a private key ...
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1k views

Crack Windows 10 password with Cain and Able

A few months ago I reset my Windows password but my keyboard must have had a sticky key or two, effectively changing my password to an unknown password. Out of desperation and a little research I used ...
MPaul's user avatar
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0 votes
1 answer
234 views

Recovering NTFS encrypted files from a USB drive on a different machine

I have some files on an NTFS USB drive. The files were encrypted on a Windows 10 pc and copied to the USB. I had to completely reinstall Windows on the PC. I do not have a backup of the USB files I ...
Adam's user avatar
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2 votes
1 answer
696 views

Is encrypting the FireFox folder with EFS protecting saved passwords in case of someone accessing the hard drive?

What I want to do: Use the "save password" feature in FireFox (on Windows 10) without using FireFox's master password feature. What I'm afraid of: Someone stealing my laptop or getting access to my ...
Tim Pohlmann's user avatar
1 vote
1 answer
443 views

Read NTFS / EFS encrypted files on iOS with saved certificate

I have data saved on old NTFS-format hard disks which were encrypted on Windows machines, using EFS (the native file encryption system built into Windows). I encrypted selected files/folders, only, ...
user3100645's user avatar
7 votes
2 answers
890 views

Win10: Access other logged on users' memory

How easily can admin users access the data of other users' running processes on Windows 10? Especially webpages loaded by Chrome. Example Context Bob and Alice share a single Windows 10 ...
Hanswurst's user avatar
1 vote
1 answer
111 views

Is it possible to separate DRA decryption abilities?

In the name of separation of duties, I was wondering if there is a simple (or even not-so-simple) way of dividing the ability to decrypt an EFS encrypted file such that it would require two DRAs to ...
Y     e     z's user avatar
1 vote
1 answer
559 views

Decrypting files that were encrypted with EFS?

I was wondering if there was a way to decrypt files that were decrypted with efs. I have an external drive with encrypted files that were taken from an old computer. I have the certificate and I ...
Tucker's user avatar
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2 votes
0 answers
188 views

Windows EFS Files Spontaneously Unavailable

We are trying to secure a folder with over 1 million very small text files using Windows EFS on Windows Server 2008 R2. We already have an infrastructure in place for backing up keys and data. We ...
Frank Riccobono's user avatar
1 vote
2 answers
3k views

Will encrypted files on a volume still be encrypted when uploaded to a cloud service?

If I encrypt some files in a folder using EFS, and then I upload such files to a cloud service, will they be encrypted on the cloud? While the logical answer seems to be yes, I think in reality the ...
nonhocapito's user avatar
1 vote
2 answers
2k views

EFS certificate expired and Root CA offline

If an EFS certificate is expiring and attempting to renew itself AND the issuing subordinate which issued that certificate is down, offline, or has it's subordinate certificate expired, will the EFS ...
Markie Mark's user avatar
4 votes
1 answer
7k views

Is EFS on Windows useless?

So, after reading through the dialog from one the EFS Windows--after encrypting certain files on my system--I ran into a possible complication. If I'm not mistaken, the encrypted file or folders are ...
ThatRandomGuy's user avatar
3 votes
1 answer
229 views

How is encryption different for Windows yet they are identical?

I right clicked on C:\Users\USERNAME and did advanced -> enable encryption. On one laptop it turned green. The other it shows an icon on the files with a lock. What is the difference between these? ...
Jason Pass's user avatar
2 votes
1 answer
155 views

Is EFS FINRA and SEC Acceptable

I'm trying to search in their manual but there is nothing explicit being mentioned as to what type and how encryption should be done. Can I assume that if I use EFS on the entire USER directory that ...
Jason Pass's user avatar
3 votes
2 answers
8k views

How difficult is it to brute-force Windows EFS encryption?

With EFS I have C:\$USER\ encrypted so all files owned and used by said user are encrypted. If this laptop is stolen, am I correct that they could pull the microsoft user password hashes, crack them,...
Jason's user avatar
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2 votes
0 answers
445 views

How secure is Windows EFS on Amazon?

We evaluate using Windows EFS on Amazon EBS. There is a report about Windows flaw that allows you to copy data from an encrypted volume as described in this article: http://slashdot.org/topic/bi/the-...
isobretatel's user avatar