A file system is a way of organizing information on a storage device like a computer hard drive.

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How to restrict flash drives in Local Area Network

It is prohibited to use USB drives at our office, due to security reasons. But some people still use them to steal information. It is now a great risk factor at our office. Now we need to ensure any ...
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4answers
3k views

Writing file shredder

I want to write a simple file shredder in c++, i.e. a program that deletes a file so that it is not recoverable. Would the following be a secure and correct way to do that? (1) Open the file with ...
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5answers
2k views

Prove that you deleted the file

Is it possible to prove a date that you Deleted a file through the recycle bin? I delete a folder of pictures 2 months ago and somebody is asking to prove that I did it.
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3answers
201 views

Theft of data via live boot disk

I have been working with live boot disks recently and I know that it gives you access to the computer's processing power, internet, and various other tasks without the hassle of a username/password. ...
2
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5answers
185 views

Why can't just any program use his own file-system-access-system?

This may sound stupid for everyone who knows more than me about the UNIX-System and security in software: Imagine you have a program trying to cause harm by deleting files. You just do something like ...
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3answers
264 views

How to protect data on your hard disk if it is in an unfriendly environment?

The essence of the problem as follows: There is a server located on the side of our company. There is a hardware client module, which is in a public place, which communicates with the server via a ...
2
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2answers
192 views

How risky is having sensitive files on webroot?

I understand that having anything sensitive under webroot is not smart; someone may be able to access it via url. However, I do not have a choice with my web host (iPage) as they limit my server space ...
2
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2answers
208 views

exploiting setuid and setgid bit

I was reading material on secure coding and at many places it is mentioned not to use setuid and setgid bits for privilege escalation. These a vulnerable and can lead to security issues. Instead we ...
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1answer
236 views

Where to store uploaded images from perspective of security

It is quite common that uploaded files (images, videos, etc.) are stored on a file server because of performance and database-recovery-time reasons. But is there a benefit of storing such files in ...
2
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1answer
361 views

Uploading Executable Files

Using proxy software, I was able to bypass a file upload control file-checking for an asp.net system I am pen testing. I noticed they are saving the file into the database as bytes, and it is ...
2
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2answers
6k views

How do worms spread over LAN? [duplicate]

I've been researching LAN recently, and I came across a post talking about viruses spreading over LAN, and I was wondering, how is this possible? Would it not be a huge security issue to allow files ...
2
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1answer
68 views

Secure data by encrypting and rewriting on same file

I'm working on a project to Encrypt files using AES encryption with a key generated from SHA-256 from a keyword. My idea to claim this was to first : read all bytes from a file second : encrypt ...
2
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1answer
53 views

Difference in size avaialbe in encrypted volume [closed]

I was making a volume with trucrypt and I set the size to be 12MB. I tried copying 10 files totalling 7.13MB (on Disk) but got an error saying I did not have enough space. Why is this? Is it because ...
2
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1answer
87 views

Tell if someone accessed my filesystem

In the organization I work for, the computers are connected in a network, and I can access each PC's filesystem via '\' if I state the "Master User" credentials, once the login window pops up. since ...
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2answers
1k views

What does Gazzang zNcrypt actually protect against?

In an effort to increase security of our website, I'm reading up on Gazzang zNcrypt, which claims to protect data in databases from breaches. Technically, it seems to do filesystem encryption. As far ...
2
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3answers
1k views

On Windows, how to restrict access to a folder, sub folder and files to only some applications (not users)

We have an application which is not per user and can be used by multiple users simultaneously. Data is also shared by all users. The path to the data folders we use is ProgramData\OurAppName\Data ...
2
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3answers
357 views

Wipe free space or take image and wipe entire disk?

Read some of the stuff here regarding wiping disks and securely deleting files. From what I've understood, after deleting (not securely) files they become part of the unallocated(free) space of the ...
2
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1answer
1k views

Is the mount manpage saying nosuid *is* secure, or is *not*?

I'm a bit confused about the description of nosuid in the mount manpage on this RedHat system I'm setting up: nosuid Do not allow set-user-identifier or set-group-identifier bits to take ...
2
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1answer
1k views

Extract SquashFS filesystem with shsq magic number [closed]

for a few days I was trying to extract the filesystem of a router firmware. Checking the image that the vendor provides I can see a SquashFS flag on it: DECIMAL HEX DESCRIPTION ...
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3answers
4k views

Are file permissions set in Unix/Linux effective in Windows or Any other OS?

Consider some files and folder in Unix/Linux OS which are configured for only read access by root, if the hard drive stolen, and used in Windows Environment, are these permissions are still effective? ...
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3answers
310 views

How to minimise risk to sensitive data in temp files in shared hosting environment before encryption?

openssl_pkcs7_encrypt() requires the data to be encrypted to be read from a file and so unfortunately it requires sensitive data to be written to temporary file before being encrypted. In a shared ...
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2answers
901 views

best practice for encrypted filesystem inside a file

This is an extension of my question on UNIX. Let's suppose I create a file, map it to /dev/loop0, and create a LUKS partition inside dd if=/dev/zero of=myfile bs=1M count=1000 losetup /dev/loop0 ...
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2answers
185 views

How to secure sensitive information on cloud from administrator (end-to-end encryption)

When I use end-to-end encryption to secure documents and sensitive information on cloud or on computer, there is always a risk of accessing these information by administrator. For example if you use ...
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1answer
345 views

VeraCrypt: create encrypted container: Volume Format: Options: Filesystem: None?

I see VeraCrypt has an option to create an encrypted container with no filesystem. How is this possible? If there is not filesystem there, then how can I place my files or folders in the container? Is ...
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2answers
108 views

What are hardened ACLs for the Windows %systemroot% folder?

What are the recommended file permissions for %systemroot% in Windows 8.1? I couldn't find hardened file system permissions to apply to better secure a Windows installation.
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1answer
57 views

What are the risks of file server access over wireless? [closed]

In our office, all computers connect to the network over wireless. The wireless is protected by a pass phrase and communication is AES encrypted. On the same network is a file server that is used ...
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1answer
116 views

Best way to secure file removals in Windows remotely

I have Windows 2008 R2 box on colocation. I want to remove certain files with a high degree guarantee it cannot be recovered from physical HDD access. Could someone please explain what levels of ...
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1answer
61 views

What kind of answer is this textbook question looking for in access control model?

I'm going over a practice question and I have trouble understanding what it's asking. Draw an access control matrix for the following Linux file system. Group A1 contains S1 and S3, group A2 ...
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1answer
110 views

Is storing a client's folder structure a security risk?

At work, we generate sensitive report files for our clients. Currently, these files are stored in cloud storage. Some partners want the files on their local machine, instead, so we will need the ...
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2answers
107 views

Are there any artifacts for filesystem forensics in memory?

I have a memory dump. I know it is infected by a rootkit which uses its own file system installed at the end of the disk. Can there be any artifacts in dmp file to show this?
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24 views

Does erasing slack space ever make sense on flash-based storage?

Slack space appears when a file written to the disk does not occupy the last cluster entirely. For example, if I write a 512B file on the HDD formatted with 16KB clusters, only a single 512B sector ...
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1answer
71 views

How much access to the file system does the recent Drupal vulnerability give?

A friends drupal site was hacked. What is strange is that the root directory of the installation at the hosting company (let us call it rootdir) was copied (or renamed) rootdir_hacked and the ...
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0answers
887 views

External hard drives: 'date last accessed' file?

I'm trying to figure out if there's a way to figure out when files on my external hard drive were last opened. I'm using a Seagate Backup Plus, and it's both mac and PC compatible. BUT, I've also read ...
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1answer
2k views

Repair Truecrypt NTFS-partition with undetectable filesystem [closed]

Long story short: Got 1 TB HDD. Created one fullsized (non-system-)partition on that. Encrypt via TC. One time, via boot, Win presumably formats that (and maybe writes some bytes on it). I manage to ...
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4answers
296 views

Free space shredding

I'm an avid fan of file system forensics but I'm an amateur so far. I've been reading up on NTFS forensics and I've noticed you sometimes can know if a file was on a certain volume even if it was ...
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4answers
367 views

Possible to find out the last person to open a file on Windows without specialist tools?

So I suppose this is specific to the OS you are using or the filetype or software used to open it, but my question stands open for all really but I am particularly interested in more common files such ...
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3answers
143 views

Can a computer's contents be downloaded wirelessly?

So my calculus teacher, who also teaches computer science, claims that a computer's entire filesystem can be downloaded wirelessly by anyone on the same network? As a Ruby on Rails professional, ...
0
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1answer
2k views

Can File Sharing being Controlled by Mac Address? [closed]

I am currently setting up secure environment between 2 pc in isolated network. Just wondering can we do file sharing based on that pc mac address instead of username? The environment is OEM Windows ...
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2answers
39 views

Safely generate a non-log file within an application server

How does one go about safely write a temporary file to a location within an application server that is publicly accessible?
0
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1answer
239 views

is there any program that can tell me which files have been transferred from my computer thru the web

Is there a program that can tell me which files have been transferred from my computer thru the web? So if I have virus on my computer that transfer files I will know about it according to the files ...
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0answers
7 views

How can I format a VeraCrypt partition with ExtFS from MacOS? [migrated]

I want to move my TrueCrypt partition to VeraCrypt. It is currently formatted with NTFS and because I switched to MacOS (for now) I want to move to ExtFS. How can I format a VeraCrypt partition with ...
0
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1answer
203 views

Secure distributed storing and querying of [medical] data?

Comparing ways of distributing and securely storing and querying structured and schemaless data. Currently I am using MongoDB, but am looking into (Postgres|MySQL)&CryptDB, Cassandra and others. ...
-1
votes
1answer
6k views

Files deleted by some Employee . How to find what time it happened and whether done from another computer on network? [closed]

My Files got deleted by any Employee . How to find what time it happened and whether done from another computer on network ? The files were in shared drive in the computer. I am using windows 8. What ...
-1
votes
1answer
440 views

How does one find out the file system / directories structure of a webserver they don't own? [closed]

How does one with simple access rights find out the remote host directory structure? I see that web archives are able to not only backup content on the specified domain, but every folder within it.
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2answers
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How likely is it to find valuable information in the slack space of a workstation?

I just read about slack space which is the unused space at the end of a sector. This space is unused in some sectors when either the file itself is smaller then the sector or the sector contains the ...
-1
votes
1answer
148 views

Would this be plausible for a metamorphic virus? Not repeatedly infecting same system

Would this be plausible for a metamorphic virus? When a new generation (for lack of better word) is created it would hard code a random file name, that would be checked to see if the system was ...
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1answer
61 views

Undelete-secure AES software and software for carrying out “full undeletion” free-partition-space zeroing/reformatting on Windows?

It is fairly well known that on Windows, when you delete a file (or folder which may contain any number of files and subfolders possibly containing other files and subfolders and so on), Windows just ...
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4answers
609 views

What role does paging play in respect to security?

What role does paging play in respect to security? By paging I mean memory management technique of splitting file memory into pages I guess the question is does it make files more secure?