Questions tagged [hardware]

For attacks against, or best practices for physical components of an Information Technology system. It can consist of network equipment, servers, CPUs, hardware security module, smartcards, etc. When using this tag, also include an additional tag for the specific type of hardware.

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Making complex boolean circuits that give true as output only for a specific combination of boolean inputs [migrated]

This is my first question on a stack exchange website so please bear with me. I am making challenges for a jeopardy style capture the flag event in my college and I had come across the minetest ...
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Are Thunderbolt-enabled computers without Thunderbolt ports vulnerable to Thunderspy?

Could these two attack scenarios exploit the recently publicized vulnerability? Using a Thunderbolt adapter like an USB-to-Thunderbolt adapter on a computer without any Thunderbolt port Temporarily ...
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Why did I never see those “spy signal jammers” for sale?

I recently watched a 1980s computer television programme about the problems of spying. Basically, they showed how anyone could buy relatively cheap and common hardware and then be able to sit outside ...
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Understanding the Secure Multi-party circuit for Stable Matching

I am reading the following paper: MPCircuits: Optimized Circuit Generation for Secure Multi-Party Computation link of paper I have following questions: why Preference of group1 starts from L_0 ...
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Prometheus node_exporter Metrics file discovered [closed]

I found a 'Metrics' file during a test containing: # HELP go_gc_duration_seconds A summary of the GC invocation durations. # TYPE go_gc_duration_seconds summary go_gc_duration_seconds{quantile="0"} 0....
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How to use potentially malicious hardware safely

I know the methods for running possible malicious programs safely but how do I keep my computer secure when I need to use a tool that might be malware. I cannot run it in a sandbox or virtual machine ...
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78 views

USB 3.0 write protection switch question

I bought a USB 3.0 flash drive with a write protection switch for use with a Linux live distribution. My question is, once the OS is installed and running, I tested it and I can still install programs ...
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Hardware vulnerabilities vs software threats

What are the key differences between them? I find both of them would also be able to retrieve data from the host system and both also could cause harm. I do not understand why there are people who ...
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Is it possible to debunk Intel Management Engine conspiracy theories using a data usage monitor device?

If there would be any backdoor in recent Intel CPU's, then it should send and receive data secretly. Isn't it possible to easily debunk this conspiracy theory by implementing a third physical device ...
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Are all USB-based attacks dependent on being able to inject keystrokes?

From what I've seen, USB-based attacks such as RubberDucky need to be able to open a terminal and then execute commands from there, usually to download and then install malware or to open a reverse ...
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Could a Hardware Token Defeat a Keylogger?

I would like to improve my understanding of keyloggers by asking what is feasible with current technology. That is, I mean to be asking a conceptual question that doesn't verge into sci-fi. My ...
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Can you trust your computer devices to be safe to use if they have been in the hands of potential hackers? [duplicate]

Suppose you lose the bag containing your laptop along with its accessories or while travelling the police confiscate all your computer devices, can you safely use all the devices again if you format ...
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Best practice to secure hard-drive in case of theft or loss or unauthorized access?

Scenario: a person owns and used only a laptop (or PC) and on its hard drive is stored sensitive information, in addition, in browsers the logged-in sessions to gmail, facebook, server, etc...etc.. ...
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Is there a safe way to use external display with USB Type-C laptops?

Somewhat related to Is malware or screen capture possible with iMac as external display?, where we investigate the possibility of a DMA attack through DisplayPort, nowadays, many machines don't even ...
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Is the security seal on samsung phones proof that the phone has not been tampered with?

Samsung phones come with a security seal that says you should not buy the phone if it is broken. Is this proof that no one has tampered with the phone? Is there some way to take off the seal and ...
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Protecting private encrypted data on public computers

Consider an (Java) application that will be deployed on an off-the-shelf laptop in a public location. The laptop is not connected to any network or the internet. A USB barcode scanner is available as ...
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How to identify which device is malicious

I'm facing a surprising problem : A windows 10 computer seem to use keyboard and mouse by himself on the login screen. So I'm guessing : It's not a software intrusion, because it that way the ...
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What kind of attacks can hardware level memory encryption protect from?

Both AMD and Intel have introduced memory encryption at the hardware level. AMD calls this Secure Memory Encryption (SME), with the Intel version being Total Memory Encryption (TME). What kind of ...
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threat intelligence gateway [closed]

A TOG (threat intelligence gateway) is a hardware piece that sits between the router and the firewall. The TIG uses the threat intelligence and filters out the malicious urls and IPs before reaching ...
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What credentials does this hardware device steal?

I was reading about this device the author made, however he did not specify WHAT he was able to steal from a locked computer. What credentials does this steal? https://room362.com/post/2016/snagging-...
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How to protect external hard drive from tampering?

I am looking to buy an external 1TB hard drive to store sensitive information on. External hard drives aren't (physically) small, and it may have to be left unattended at times. What can I do to ...
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288 views

Is there a unique way to identify a hardware?

I'm considering an environment in which I will have to identify a computer. In this scenario all hardware parts (CPU, HDDs, RAM, etc) won't change, while I'd like to consider a changing OS. The goal ...
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Ring -3 exploits and existence of other rings

Concept of Rings Rings were introduced in the forerunner of UNIX, Multics, and had 8 rings for reading, writing, executing and calling (I don't quite understand why it needed 8 rings to do this, if ...
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Are the security basics of a non-wifi router different from securing your desktop? [duplicate]

I have studied much about securing a desktop from enabling firewall to browsing internet safely among other things. I also know that many steps can be taken to improve the security of wifi routers. ...
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How can I challenge an attacker to reliably identify their hardware? [closed]

I distribute a client application where I would like to identify a user's hardware specifications when they begin interacting with my server. I am specifically interested in identifying the user's GPU ...
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175 views

Can PCB's contain spyware?

I'm thinking about purchasing a keyboard PCB from someone overseas, but I'm not 100% sure if it's safe. The firmware I'm going to install is QMK which is open source and I feel safe using it. ...
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3answers
292 views

Easiest way to secure my home network from work pc

I am about to start a work at home position using a mac. I will be using my own personal internet to connect to their servers through their VPN. I want to isolate my work PC from accessing my home ...
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187 views

How to make USB drive read only and write by a password or key or certificate?

I am trying to distribute a software, a simple exe file, that can be executed directly from an USB drive. I would like to make that USB drive read only to avoid any malware infection and accidental ...
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463 views

Requiring hardware key at boot-up on normal laptop

I am sure that a question like this already exists and has probably been answered. I just couldn't find any results (probably due to my inability to word my question correctly). We use laptops at ...
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Estimating Password Cracking Speed Based on GPU?

I was wondering if there was a calculator or formula I could use to find a rough estimation of the time it takes to crack hashes based on GPU. I am trying to assess how much performance I would lose/...
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How secure is a Mac if it passes Apple Diagnostics?

Recently I brought my MacBook Air to a Genius Bar to perform a clean MacOS installation. For security purposes, I asked for a hardware check as well. The Genius Bar technician ran Apple Diagnostics, ...
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1answer
182 views

Do video cards store any personal information? Should they be destroyed when getting rid of them?

I realize this question sounds a bit ridiculous but I figured it couldn't really hurt to ask. I am in the process of getting rid of some old computers of mine, and I know that I need to destroy the ...
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4answers
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Should one buy new hardware after a system compromise?

If there are places on a laptop malicious programs can leave elements, hooks, backdoors etc, in locations such as BIOS, device controllers, firmware etc - what confidence can one have in wiping the ...
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2answers
183 views

Does “Restore Factory Defaults” Wipe Out My Data Completely?

I used to have a IBM Thinkpad (Lenovo) T440. I have been using that laptop for over 8 years. This device has been reset to factory default multiple times (probably up to 6-10 times if not more) ...
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291 views

Is there a “no-spy, no-backdoors standard” for telecom hardware manufacturing?

The BBC News article Huawei says willing to sign 'no-spy' agreements reports the following: Huawei has also said it is independent from the Chinese government, but some countries have blocked it ...
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925 views

What are the new MDS attacks, and how can they be mitigated?

Several new hardware side-channels were discovered called MDS attacks, which allow reading arbitrary memory, like Meltdown. Many existing mitigations are useless against them. The relevant CVEs are: ...
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156 views

Is faulty RAM a security risk?

If the RAM is only slightly faulty, so that the machine boots apparently normally, but sometimes crashes. Can the fault be leveraged somehow?
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A SIM module-based security system and radio signal interruptions

I would like to setup a simple alarm system using something like a Raspberry Pi or Arduino, some sensors, and a SIM module to send me an alarm when an intrusion is detected. If I were dealing with an ...
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1k views

What are the differences between HSM and SE?

What are the differences between a Hardware Security Module (HSM) and a Secure Element (SE)? Can both terms be used interchangeably? I came across various related question (TPM vs. HSM and TPM vs. SE)...
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94 views

Local area network multi-device network communication protocol

I am planning to build a local area network that will have one Master device and multiple Slave devices. The communication should be able to handle only ON/OFF functionality of the devices (devices ...
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238 views

What is risky about international travel?

I have seen guidelines which suggest that traveling overseas is particularly risky when it comes to protecting your intellectual property. I'm confused about what specifically are the factors that ...
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1answer
105 views

Does Apple supply hardware keyloggers? [closed]

I received a brand new Mac laptop for work that is basically ours and doesn’t have to be returned, even after quitting. It was inside the box and sealed. I was wondering if Apple supplies and installs ...
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65 views

Is Linux dangerous for secure environments because it's open source? [duplicate]

I work for a company that sells hardware products with Linux embedded into the product. We lost a job for a defense contractor due to our hardware running Linux. Their reason was "because it's open ...
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1answer
190 views

Anomaly on new laptop. Does it suggest tampering?

My laptop has a plastic chassis whose panels click into place (no screws on the outside). When I bought it (new), there was a gap on one side along the seam joining the top and bottom halves of the ...
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189 views

External hard drive's hardware vulnerabilities [closed]

You have an external hard drive that was left in a public place. The data is encrypted. What are the hardware or software vulnerabilities one can use to get the encryption password when one decrypts ...
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9answers
24k views

Buying a “Used” Router

I am buying a "new" router from an open-box sale at a company that liquidates eCommerce returns. Plan to use it for a home network at cottage. I'm a bit nervous that it could have been modified by ...
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1answer
221 views

Why must Meltdown use probe array?

This is code snippet of Meltdown assembly language code: 1. ; rcx = kernel address, rbx = probe array 2. xor rax, rax 3. retry: 4. mov al, byte [rcx] 5. shl rax, 0xc 6. jz retry 7. mov rbx, ...
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How to securely generate a License tied to 1 Computer for each user

This question is related to my first question: How secure is this schema for Online Licensing System? I'm trying to sell a subscription based software and I can't find a good way to generate a serial ...
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164 views

How is it possible that the Metasploit meterpreter can take pictures without “notifying” the user?

Im curious how the Meterpreter can take pictures from my webcam without turning on the webcam LED? Ive read that you have to write/change a driver, or a firmware, or you just change some DLLs, but ...
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143 views

Why don't smartphone manufactures write the IMEI onto one time writable ROM so that it can't be tampered with? [closed]

The title says it all basically. Even now, why is tampering IMEI possible at all? Shouldn't manufactures be using one time writable memory to embed IMEI into phones? Why don't they?

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