The operating system is the software component that provides abstraction of physical hardware, and provides a generalized model for application software to execute without the need for specific hardware knowledge. Questions on the topic of operating system security should use this tag; you may also ...

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16
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2answers
2k views

How secure is Keychain on OS X?

Keychain is a built-in app on OS X that stores all of the user credentials, and allows for one to keep encrypted notes in an easily accessible way. Does anyone know how secure Keychain is? I know ...
16
votes
3answers
1k views

Multi factor authentication on Ubuntu workstations, where to start?

Is it possible to have Ubuntu users log in with multi-factor authentication? I was thinking of a combination of pass(word|code) and smartcard (with screen locks when for example smart-card is removed) ...
5
votes
2answers
171 views

How is the password prompt going to protect me from ruining my computer?

On Unix based systems, I'm often prompted to enter my password before installing or running a program. Why does this protect me? If I'm running a kiosk, I understand that a password might prevent ...
7
votes
2answers
331 views

How is UAC a security improvement?

What does User Account Control on Windows offer in terms of security? It's just an extra click to potentially run a virus.
6
votes
2answers
841 views

How effective is the Mac Open Firmware password protection?

I have used Mac's Open Firmware password protection before and I've always wondered how effective it actually is at protecting my stuff. [assuming a good password] Would does the firmware password ...
6
votes
8answers
3k views

Retrieving OSx Keychain passwords

I have a computer forensics style osx login.keychain file that I am trying to find the passwords from. I have a very weak mac which I used crowbarkc on to try and brute force but the horsepower is ...
9
votes
1answer
267 views

What shell binary should I use for the root account on a Linux system?

Is there a security advantage to using a different shell for the root account, either a hardened shell program, or simply a shell binary stored in a non-standard location?
13
votes
4answers
383 views

Stop software updates after the system is “stable”?

Yesterday morning I had an OS class and we just started the part about OS security. When the professor was explaining what is a patch manager, he told us that a computer company he knows which deals ...
8
votes
1answer
420 views

What steps do you take to keep both your computer and internet browsing secure?

I am thinking about your browser setup, antivirus protection, vpn, browsing best-practices and so on.
25
votes
10answers
4k views

Vulnerable OS's?

Which vulnerable OS's like for example DVL would you recommend for someone to use for the purpose of pentest/exploitation learning?
18
votes
1answer
697 views

Is it secure to connect to a remote Windows Server using Remote Desktop only?

I have a Windows Server that I login to from my home. I only use the pre-installed Remote Desktop. Is this a secure way to remote login or should I improve it in some way? If I should improve it, ...