A security mechanism which enforces policy describing which requesters may perform operations on specified objects. There are typically multiple types of operations. Common operations include: read, write, execute, append, create, and delete.

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Covert Channels Exploit and the Bell-LaPadula MAC Model

I'm wrapping my head around Mandatory Access Control (MAC) and the well-known Bell-LaPadula model. One limitation that is mentioned with this model is covert channel exploitation. The one example I ...
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1answer
104 views

Implementation of a FREE web filter [closed]

I just want some advice for the implementation of a web filter for a school network. Just want to block some contents and url. A free tool should be fine I guess. Any recommendations? Thanks!
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1answer
344 views

Trial version security

I am developing stand-alone software in BDS 2006. I want to provide a trial version for 6 months -- the user can use it for just 6 months, but no more on a particular system. I have handled most ...
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3answers
1k views

How to set password on applications in Mac OS to prevent an administrator to start them?

Is there any program that can set password on the app like mail or browser? I know about parent control, but I doesn't work with administrator account. What I want is some program that blocks some ...
0
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1answer
182 views

Best practice for selective opening of ports on network gateway

Our network is currently isolated from the outside by a Linux box, running iptables and Squid to control web access. By default we deny all outgoing traffic from all IP's, to force Web traffic ...
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2answers
656 views

Combining capability-based access control with SAML

I have been looking into various research on identity, PKI and access control trying to boil it down to a simplified methodology for IAM (Identity & Access Management). One thing which pops up in ...
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3answers
681 views

Do you give local administrator account password to notebook users?

My notebook users need to travel a lot. Quite often, they need elevated privileges on that machine, like when adding a printer or change network settings. Should I give them local administrator's ...
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6answers
440 views

Disable internet access of development PC for security

My friend's company is trying to disable Internet access of programmer's primary development PC to improve security, while giving them another PC to connect to the Internet. He is a web programmer. I ...
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4answers
342 views

Help to account all the points of physical access to a rack server to steal software

Let's say I want to move my 1U Dell server to co-location site with a hostile company who will try to steal my code (this is almost 90% probability if I dont take steps)... The limitation for their ...
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4answers
3k views

Role Based Access Control + Data Ownership based permissions

Is there a common system or pattern that combines the permissions given by a role in a RBAC-system with permissions in relation to dataownership? For example: Bob is a doctor and has the role ...
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0answers
232 views

What is the best way to manage temporary accounts on Active Directory [closed]

The organisation i work for has a high turnover of staff and we have a 5 day SLA to set up a new user. However this seems to be inefficient for ourselves and the business we serve. Is there anyway ...
2
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1answer
108 views

User Account Notification under Windows useful at all?

IMHO the 'screen dimming'-and-displaying-of-warning-window feature (?) in Windows is extremely annoying, since I routinely run software that does require the permission to modify a lot of things. I ...
2
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1answer
230 views

Does this htaccess snippet provide sufficient security?

I've downloaded a part of .htaccess to prevent from using base64_encode or <script> or _REQUEST within URL. Is this secure enough to help me out for partial security, or is it just a waste of ...
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4answers
2k views

Two SSIDs on same Access point- not good?

If I were to offer two networks (one for trusted users and one to visitors) on one physical access point, is this dangerous because a visitor could compromise the trusted network across via the ...
3
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1answer
2k views

Wireless MAC Address Filtering - Authentication/Association

Can somebody explain to me how a wireless AP denies access to the network if the client does not have the correct MAC Address. Does it not send a probe response when a client has not got a correct ...
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2answers
1k views

Breaking out of a strict linux sandbox running virtually under windows: do the linux-sandbox access control policies even matter?

I am developing an application which will run untrusted code. I have been designing it for linux, thinking that I can just run it in a virtual machine on windows when the need arises. The linux ...
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20answers
4k views

How can I prevent my kids from bypassing my computer restrictions?

My son has a downloaded copy of Ubuntu that he uses to "break" into my computer, bypassing Vista. I have two questions: Can this damage my computer or corrupt my files? (I have lots of pictures) Is ...
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1answer
288 views

Can HIPS software practically be considered a form of MAC

Host Intrusion Prevention Software can restrict applications from taking certain actions regardless if they have the privileged to do so as assigned by the operating system. Given that with the use ...
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5answers
905 views

What is the practical difference between MAC and Capabilities

Both Mandatory Access Controls and Capabilities allow for fine grained privileges to be assigned to applications irrespective or in place of privileges inherited by the running user. Is there any ...
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2answers
1k views

How do I log everything a certain program is doing?

i have a program which is pretty simple. Its just a simple login form. Is there any possibility to log what this program is doing (maybe which file he is accessing and which website he is visiting ...
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2answers
2k views

Best practices for implementation of role-based access control in healthcare applications

Amongst the open source EMRs, which ones may be good to learn from? Any references I can go to as a starting point?
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2answers
469 views

Star property in read/write access

The * star property requirement for append access [SC(S) <= SC(O)] is looser than for write access [SC(S) = SC(O)]. Can someone explain the reason for this?
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3answers
3k views

Bell-LaPadula imlementation example

I'm currently studying the Bell-LaPadula model and i need to do an implementation as an example. I understand how the model works, but I have difficulties implementing it in a programming language ...
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9answers
3k views

In Healthcare IT, is a “break glass” mode to bypass access controls commonly required?

I've seen referenced in literature the need to have a "break glass" mode in Healthcare IT applications. In this mode, the access controls in an application can be bypassed for an emergency when it is ...
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3answers
301 views

Remote Connection Tampering

My small high street laptop repair/service/maintenance shop has been up and running for about 3 years. It's doing quite well so I'm looking to expand into other areas of the PC market. One area I ...
8
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1answer
221 views

What practical uses are there for the AD feature of “Confidential Attributes”

Are any applications (off the shelf, or internal) leveraging Active Directory's Confidential Attributes? Would you store sensitive information here such as a private key, or a salt here? I'm ...
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3answers
165 views

Requiring Authentication to Exit

I've often wondered why facilities do not require authentication as a default on exit. Beyond the oblivious reasons: Fire safety policies would require a panic mechanism to override the access ...
13
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1answer
841 views

Are there Linux rootkits circulating that directly modify the kernel (without modules)?

It has been said, over and over, that disabling dynamic kernel module loading on Linux increases security. I understand why people give this advice, but I've always assumed that a bad guy could ...
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4answers
970 views

Securing an area both physically and technically

I work for a commercial printing company, and we're beginning to get a couple jobs labeled "High Security". Essentially this means that if any pictures/information/files/etc. of the product were ...
3
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1answer
925 views

Securing sensitive data in a DB,is using H2 worth it?

I am designing a web application at the moment, and one of the requirements is to secure the user credentials as well as their roles. Now of course, besides the usual password hashing + salt +.... I ...
3
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1answer
2k views

BLP Lattice-structered system from Access Control Matrix

I've been reading a Computer Security book by Walliam Stallings and have found this example: http://i.imgur.com/5CAlc.png of an Access Control Matrix. Any example will do I just thought I'd screenshot ...
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5answers
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Can someone steal money from my bank account if they know my IBAN and personal details?

To deposit money into your account, some websites require that you provide them with a lot of details about your bank account: name, complete address and IBAN which includes your account number and ...
15
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2answers
692 views

Network policies under AppArmor/SELinux

I am attempting to sandbox some untrusted processes using Linux's MAC frameworks -- either SELinux or AppArmor. I see that both SELinux and AppArmor allow the selected granting of socket level access ...
3
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2answers
317 views

Which access rights should be chosen for doku wiki?

I'm currently making my first experiences with a CMS called "DokuWiki" (Link). This CMS needs only PHP and writes the information to files (seems to be /dokuwiki/data/pages). At the moment I gave the ...
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4answers
4k views

Are there DRM techniques to effectively prevent pirating?

A question on Skeptics.SE asks whether current DRM techniques effectively prevent pirating: Is DRM effective? The question for IT Security is: Can DRM be made effective, and are there any examples? ...
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3answers
33k views

How do you discover what permissions an AD group has, if you have no documentation?

You just got hired at company A and the old administrator is no longer there. Requests start coming through for adding users to the internet restrict group. When you look at the groups none of the ...
4
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1answer
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Windows task manager can see all processes as non administrator without permission

On Windows Server 2008 R2 operating as a standard user, when I open Task Manager I can see all the processes from different users on the system. I have the option to click "Show all processes" which ...
9
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1answer
731 views

How to prepare for protecting identity after death?

In the context of online accounts and identities, what are some best practices to prepare for the one certainty we all face: not a one of us will get out alive.
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2answers
312 views

Can you pick up any device specific information by monitoring bluetooth signals? [closed]

Could I use some sort of permanent device ID broadcasted by the bluetooth radio in my phone to do something like unlock my door? I don't want to have to ever pair the device, or take it out of my ...
5
votes
1answer
953 views

Does Fedora 15 still use suid bits?

I heard that Fedora 15 will not use suid bits. Is that true? Is the suid bit a security design bug?
3
votes
3answers
476 views

How do I clearly distinguish between groups of formal and informal models?

I'm currently studying for the CISSP exam and would like to ensure that I'm using proper terminology when referring to models. I'm a little confused because I'm coming across generic and specific ...
8
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1answer
392 views

What is a practical example of an action that violates the non-interference model?

I'm studying the non-interference model as part of CISSP prep and am having trouble thinking of a practical example where a violation would be involved (and the consequences of those violations). I ...
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votes
2answers
2k views

What's the difference between an access control method, security model, and security policy?

(I should apologize in advance because this question is going to be messy -- I'll try to refine it as the subject becomes more clear to me). I'm studying for the CISSP exam and I'm getting confused ...
4
votes
2answers
144 views

Is it correct to consider audits as exclusively “detective” in nature?

I'm studying for the CISSP exam and one of the video lecture points didn't quite make sense to me. The instructor was discussing access control administration areas and began categorizing certain ...
4
votes
1answer
1k views

Is it correct to consider Task Based Access Control as a type of RBAC?

I'm studying for CISSP certification and one of the video lectures I viewed (CBT Nuggets) really confused me. Here are some excerpts from the lecture: "Role Based Access Control doesn't ...
4
votes
3answers
185 views

(custom software) Security rules on each record when using user-groups per application

I'm working with custom software here, so don't worry about Microsoft whatever, Open anything, or something else. Let’s stick to theory of how this should go together. Let’s say I have a user ...
11
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3answers
239 views

Different MySQL Users Security Benefits

Anyone with a brain cell knows that using a user that isn't root/dbo/etc adds a lot to security and how effective SQL injection attacks can be. I'm wondering if taking that idea a step further is a ...
5
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3answers
2k views

Why does the ★-property rule of the Bell-Lapadula Model allow information to be stored in objects with HIGHER sensitivity labels?

I'm self-studying for the CISSP exam and am having difficulty wrapping my mind around the practical side of the ★-property rule in the Bell-Lapadula Model. I understand the mechanics of it and that ...
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3answers
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Practical non-government uses of Biba, Bell-LaPadula, etc. models

For example, the Biba model is now hanging out in current versions of Windows. Things downloaded from the Internet are tagged as such. Internet (low) stuff can't alter user (medium) stuff which isn't ...
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3answers
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Security Architecture - Settings to drive UI and Privileges (Rights) - Role-Based, per User-Account

How do large companies implement their security requirements which are centralized and used to drive things people can do (allowed to call a certain web-service, submit an order, etc.) as well as to ...