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Questions tagged [physical]

The use of physical measures (such as locks and tamper-proofing) or policies (such as Clean Desk) in order to protect sensitive information from unauthorized access.

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1answer
100 views

Is it Possible to Prevent a Physcial Attack on Server in Remote Data Center?

I've been using Amazon Web Services to run my Java application. However, due to high costs I'm looking into getting a dedicated server from Hetzner, a company based in Germany, which costs about 10-...
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2answers
54 views

Mobile phone is picking up 13 bluetooth devices and not sure what they are?

I have a particular problem with a potential security breach. I bought a new device today that connects to my phone via Bluetooth. Nothing strange about that. Surprisingly when I turned Bluetooth on ...
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0answers
102 views

An advanced adversary is targeting you - now what? - so what? [closed]

Consider the following: An advanced adversary is targeting you. He has the ability to watch most if not all of your network connections and the ones in the neighbourhood. He is sitting on numerous ...
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0answers
47 views

Phoenix/Samsung BIOS/HDD security

I have a laptop bought in 2011. I want to protect its BIOS and HDD (data is already encrypted anyway). But I have seen these vulnerabilities: After 3 incorrect tries, I see "System Disabled" with ...
9
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1answer
283 views

What steps should I take to ensure there are no unpleasant surprises in a recently purchased home?

After buying a house from another party (i.e. not new construction) what steps should I take to ensure the previous residents have not left behind anything unpleasant for me? I'm not worrying about ...
2
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1answer
176 views

How to mitigate the new malicious USB cable USBHarpoon (NOT BadUSB) threat in an enterprise? [duplicate]

In this case, the victims may think they are using a generic USB cable, but the PC will recognize the cable as a Human Interface Device, much like it would a mouse or keyboard, giving the attacker ...
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1answer
173 views

Why should I leave a U2F device always plugged in to a computer?

Over at the Yubikey website they mention that the Nano or 5C Nano series is meant to be always inserted into a computer. I've seen some other sites mention the Nano is good for servers. But why would ...
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2answers
90 views

Security and thumb drive [duplicate]

If my laptop is locked, can a thumb drive be able to still infect my computer, or create a backdoor, or any other security risk if it's plugged into it. If so what are some example
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1answer
38 views

Does the number of fingerprints we leave represent a security threat to the banking system?

A number of major banks are allowing users to log in to their bank accounts with only fingerprints. It was occurring to me, though: how many fingerprints does the average person leave per day? How ...
2
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1answer
173 views

What is the fastest way to brute force a hardware code

Where I live, there is a keypad with numbers from 0 to 9 and two letters, A and B. Using it I noticed that the code was checked on the last 5 things entered. If I were to try every code on the keypad,...
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1answer
27 views

Liquid security scenario

I'm a part of a small team of undergraduate developers taking a course on developing Arduino and Raspberry Pi applications with a focus on the Internet of Things. Our current task is to imagine, ...
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2answers
235 views

Is there any way somebody could hack into my brain?

Before you close this, I'm actually serious. Could somebody, in theory, have conked me out behind a Chiles, cirucular-sawed my brain out, and plugged me up to a machine capable of brain simulation? ...
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19answers
22k views

Defence methods against tailgating

This is a follow-up question to this one: Roles to play when tailgaiting into a residential building How do you protect yourself or your company against tailgaters? What is the best answer when you ...
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4answers
98 views

Assessing risks Physical security of devices

I have several devices and flash drives that need to be secured. I haven't been able to find any good physical security measures to protect those devices. What are my options? What do you use, if ...
43
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7answers
13k views

How resistant are barcodes and QR-codes against attempts to change stored data?

Assume we want to protect a document against manipulating and forging. So, we encode some sensitive information of the document and store it in a QR-code inserted in the document. Can we be sure that ...
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2answers
819 views

Securing a Laptop from a Foreign Intelligence Agency

What would be the best practices for securing a single-purpose Windows laptop against a determined foreign intelligence agency from tampering with data on the machine? The machine would be used ...
4
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1answer
240 views

If rowhammer only results in capacitor discharge, how can it flip 0 to 1?

In rowhammer, why will changing the voltage on one row cause the other row to open/close? Is it related to induction? How can it change bits from 0 to 1? I understand from 1 to 0 - voltage discharge, ...
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1answer
159 views

Are unbranded home security camera secure? [closed]

I plan on buying a couple of cheap cameras for my home. I plan to put them just inside the doors like the laundry door, I won't be putting them in the bedroom or living room. My major concern is how ...
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2answers
129 views

resource on physical security that calls out doorknobs as being more secure than door handles

A manager invited me to try and test the physical security of his office door lock (by non-destructive means, i.e. not ramming the door down). I found that since the door opened from inside by a ...
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1answer
635 views

How does full memory encryption in newer processes protect against DMA attacks?

Upcoming Intel CPUs have TME, current AMD processors have SME. These are full-memory encryption techniques to protect against physical attacks such as cold boot attacks. Both support encrypting the ...
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2answers
1k views

Why is an HSM required to protect CA certificates (rather than a regular USB token)?

Typical USB tokens (Nitrokey, YubiKey...) allow an everyday user to store PGP keys and use them to encrypt email, harddrives and so on. The same vendors also offer distinct products called HSMs (...
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0answers
102 views

Feasibility of using serial port/cable to act as a simple data diode?

I'm trying to determine the feasibility of using a serial port/cable to act as a simple and cheap data diode. I'll be connecting 2 Windows PCs (1 of which is on a secured network) using a 1-way null ...
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4answers
440 views

Why would taking my laptop home be encouraged for security reasons?

My company's infosec policy contains a statement to the effect that I am encouraged to bring my laptop home with me to that it never leaves my possession/control. This doesn't seem useful, from a ...
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1answer
118 views

Is there some type of x-ray that can see through HSM or shielded integrated circuit?

I know that security-oriented products can easily protect their contents from even the most sensitive commercial x-rays, which can see objects at about 0.5µm. But let's put cost limits aside (or ...
3
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1answer
714 views

Is it possible to bypass USB access restriction placed by the Active Directory? [closed]

I've been tasked with an onsite engagement to see what I can find from one of their laptops. They have a policy in place to block USB access through the Active Directory, e.g. When you try to access ...
126
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5answers
24k views

Is momentary physical access dangerous?

I’m asking the question with these conditions: The device (computer or mobile phone) is in a running state. “Momentary” refers to a reasonably short period of time, such as 5 to 10 seconds. The ...
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1answer
304 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 ...
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0answers
38 views

How to secure unique identification of physical resources in a distributed system?

I'm attempting to build a mechanism to prevent frauds and provide traceability of physical resources in a distributed system. The idea is straightforward: the resource travels hop-by-hop on a network ...
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1answer
112 views

Possible physical interface attacks on a server [duplicate]

Let's say you have a server at a data centre, but a hacker manages to find a way in and has access to your server. What are the attack possibilities with all the interfaces available? Are there any ...
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1answer
72 views

International communications after nuclear fallout [closed]

Is there a (nuclear fallout) scenario imaginable where international communications are thrown back to the stone age? Meaning: Satellites are EMP'd out of the sky Transoceanic cables are cut ...
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7answers
6k views

What are the real physical risks of casual social media publishing?

aka "how to scare my family into stopping publishing their life online?" I do not publish personal photos / opinions publicly online as a rule. I never gave hard thoughts about that but I believe ...
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1answer
320 views

What are good methods of visual security?

What are good methods of visually securing sensitive information that might appear on your screen from the outside world? An example to illustrate my question would be the following: You're sat in ...
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2answers
212 views

Creating portable bash terminal & cmd to USB [closed]

Developing my toolkit and I want to have a safe edition of cmd.exe and bash on a usb. Why? These can be tampered with by attackers and I want a version I know is safe from manipulation. Any ...
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2answers
1k views

Security and Veracrypt [closed]

I have a few questions about Security and Veracrypt and hope you can clarify it for me. I don't want the VeraCrypt hidden volume I created to be damaged. If I mount the hidden volume and transfer ...
155
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12answers
31k views

4-dial combination padlock: Is it more secure to zero it out or to blindly spin the dials after locking?

I am partially responsible for some resources protected by a 4-dial combination lock like this one: There are two things that people will usually do after they've locked it: reset all the digits to ...
2
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2answers
132 views

What security standards apply to physical security for an infosec office

I'm looking for actual specific standards that apply to physical access control for Information Security office space. Long story short, our building manager wants an open office concept, and in order ...
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2answers
156 views

Securely storing account credentials/information for critical company services - the bus factor

Question: I'm trying to figure out best practices for storing authentication credentials for critical company services - hosting services, domain registration services, recruiting portals, etc... To ...
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2answers
153 views

What would 'best practice' look like in protecting critical infrastructure against state actor cyber attack?

I was reading this article from the New York Times, which details the alarming degree to which the IT systems running critical civic infrastructure have allegedly been compromised by Russian cyber ...
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2answers
190 views

If and why should any personal information be destroyed before putting scrap paper into the recycle container?

Well this question may not be about computers, but it most definitely is about information security, so I'll give it a try... I've been repeatedly told in my life that I should always carefully check ...
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1answer
190 views

Why are mailboxes unsecure? [closed]

Why can anyone go up to a mailbox and just take the mail out of it? Some mailboxes, like at townhouses and apartments, have locks, but the mailboxes at single family homes that I have seen do not. Isn’...
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3answers
1k views

Wired VS Wireless Mouse & Keyboard Security

Wired VS Wireless Mouse & Keyboard Security For someone who is trying to maintain the highest level of security, which option proposes the LEAST amount of security flaws? Wired Keyboard & ...
40
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6answers
9k views

How “scrambled” is the data on a RAID5 disk?

My concern is the disposal of a replaced disk from a private RAID5 disk array. I have had to replace a disk from my personal RAID5 disk-array. It had started developing errors, so out it went. But ...
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3answers
797 views

Shutdown vs sleep

From a security point of view, is sleep safer than shutdown in laptops? Shutdown only needs to be done after monthly updates, since shutdown "saves" settings, "changes" etc, then reboots. Sleep only ...
5
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2answers
1k views

Are DVDs vulnerable to firmware malware (and assorted questions)? [closed]

I have a few questions about DVD drives. Are DVD drives and SATA interfaces vulnerable to issues like BadUSB caused by being able to reprogram firmware of the drive or disk or even spreading to other ...
4
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2answers
284 views

How to make a secure communication between UHF reader and UHF RFID Tag?

I found some boom barriers,used for gate system, were integrated with UHF reader + access controller and a UHF stickers (attached in car's windshield) for access control using wiegand protocol. In ...
3
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0answers
90 views

Credential leaking while unconscious [closed]

Bear with me here, because this admittedly sounds nutty, but I had a dream last night in which I distinctly recall (accurately) typing the master password for my password manager into a (dream) ...
2
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1answer
114 views

Keyboards that do not retain heat to prevent thermal imaging of key presses?

Some of you may be aware of the Flir One Pro that turns your smartphone into a thermal imaging camera. This can easily be used irresponsibly: If we can get you out the room in under 60 seconds (...
3
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1answer
437 views

Do dial locks have repeated numbers?

Can dial locks, such as the one below, have repeated numbers in their combination? For example, the combination 10-39-10 has the number 10 repeated twice in it. If so how often is this the case?
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3answers
317 views

Evidence of any large scale data breaches from lack of physical security?

You see far-fetched Hollywood examples of the most unlikely scenario's resulting in a data breach due to a lack of physical security. An example is in Mr Robot where the protagonist gets into a data ...
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0answers
41 views

Electronic store security [closed]

Iam not sure if this is the right place to ask this question. I would like to know what security features an electronic store should have besides the general alarm system monitored by a security ...