Questions tagged [air-gap]

An air gap or air wall is a network security measure

Filter by
Sorted by
Tagged with
0
votes
2answers
85 views

Eliminating possible watermarking done by text editors

On which text editor is it easiest to prevent and/or eliminate watermarking? Pre-installed malware that defeats anonymity being used on an airgapped system can be made ineffective, at least partially,...
1
vote
1answer
102 views

Send and receive files in an air-gapped system

Is it possible to have an air-gapped system which can send and receive files? From a high level perspective, I can't seem to figure out how this can work and I am starting to think it is impossible. ...
1
vote
1answer
58 views

Possible to control desktop data activity LED on Windows or Linux for data extraction? [closed]

I am trying to extract data from an air-gapped computer as a project. I already have a working prototype using high frequency sound and a key-logger. I would like to find another way to do it without ...
1
vote
2answers
59 views

Using command (dd if=/dev/mmcblk0p1 | sha1sum) while running from initramfs

I have an opensource airgapped raspberry pi project seen at the following link: www.privatekeyvault.com I have provided a method for installing LUKS full disk encryption seen at the following: https:/...
1
vote
1answer
110 views

How to prevent a virus from stealing data when I transfer files between offline and online computers?

Let's say I have one offline computer with some important data, and one online computer. Sometimes I need to move files from the offline computer to the online one. When I transfer those files, is ...
2
votes
3answers
155 views

Is malware on an air gapped computer a requirement to communicate over side-channels?

Is it a requirement to infect the air-gapped pc with malware at first to get all needed functions for a communication path between air gapped pc and attacker pc? For example: Stuxnet, first was the ...
0
votes
1answer
239 views

Pinhole communication with air gapped network

A long time ago ago I worked for a small bank. We used a physically separated network to host our internal servers that handled all the transactions, as well as the workstations accessing the system. ...
4
votes
1answer
306 views

Can an air-gapped PC receive malicious code even when completely clean, apart from all physically attacks?

The Basic question is in the title there are more questions bellow but it is in context of the question in the title...hopefully What i have read is that it can eavesdrop the Airgap PC via acoustic ...
7
votes
3answers
1k views

Malware which can bridge air gaps

The following statement is made on the Qubes website: Malware which can bridge air gaps has existed for several years now and is becoming increasingly common. Can someone provide an example of ...
3
votes
2answers
322 views

Will ransomware reach an air-gapped computer?

I'm doing some research and wondered since ransomware allows a user a decryption key- how that would be possible if it is not on a network? 12/23 Edit: After learning how ransomware works I'm now ...
3
votes
2answers
418 views

Best practices for connecting USB key to secure computer?

This is a bit of a hypothetical, but I am interested in an answer. First, I understand that no one can protect themselves against three letter organizations, so I am really just wondering about best ...
3
votes
3answers
146 views

Necessity of physical access to air-gapped computers

In an intriguing paper Fansmitter: Acoustic Data Exfiltration from (Speakerless) Air-Gapped Computers (also see this summary) the authors demonstrate that they are able to exfiltrate data from an air-...
7
votes
5answers
8k views

Air-gap implementation for personal computer use

I recently read over Bruce Schneier's article on setting up an air-gapped computer and am looking to improve my setup (compared to my current "use one Windows PC for everything" model). The main ...
5
votes
4answers
532 views

How can using multiple laptops improve security?

My being an admirer of Edward Snowden I've read several books about him. In each book and article there was said that he used four laptops in Hong Kong. Not for storing the documents, but because it ...
3
votes
1answer
102 views

Secure online server -> Airgap transport?

I'm facing the issue to develop a system which archives some data, which was available via a web-server some time before (to selected users). Now the question arises on how to securely transport the ...
7
votes
2answers
292 views

Software can be audited, is there an equivalent for hardware?

In software, code auditing can be used as a mean to gain trust into a software. Of course closed, proprietary software would complicate this, and require to do reverse engineering. Anyway there seems ...
1
vote
0answers
180 views

Airgapped network security: feasable to prevent precompiled code from running to limit vulnerability to hacked firmware?

I'm not sure if this is the right medium to ask this but I'm looking for pointers or if this is being done. I realize that this is still a bit of a open question. When internal network holds critical ...
5
votes
1answer
871 views

Is there a GNU/Linux or BSD distribution dedicated to air-gapped computer?

I am currently in the process of setting up an air-gapped computer which will be dedicated to managing cryptographic key (including: generation of GPG key/subkey, management of a small CA, generation ...
5
votes
3answers
635 views

How can I securely and conveniently move keys, certs and other short data across an air gap?

What options are available for transferring data between unix machines separated by an air gap? USB flash drives Optical media eg CDs and DVDs Printed paper and Scanning+OCR QR Code software, ...
3
votes
2answers
240 views

Adding photos to Truecrypted, airgapped laptop from camera safely

I have a Truecrypted, airgapped (no internet connectivity at all) laptop that I use as a completely secure computer for sensitive files. I want to add images from my iPhone (I know), camera or other ...
11
votes
4answers
1k views

How to airgap a smartphone?

I'm looking to use my smartphone purely as a portable computer, with no network functionality, in order to protect my privacy. Is removing the SIM cards from it enough to airgap it? Or do I need to ...
6
votes
1answer
337 views

How safe are CD's for Air Gapped computers?

It is often suggested, for air-gapped PC's, to use CD/DVD's as a transfer medium between machines instead of USB sticks or portable hard-drives as it is difficult to write data to a CD/DVD without the ...
5
votes
1answer
357 views

What can be done to bridge the Air Gap, except autorun?

What can be done to bridge the Air Gap, except autorun? Is there any hardware butterflies that can attack physically isolated Unix/Linux machine in common usb drives, like VSC (Vendor Specific ...