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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Defense-In-Depth With Common Security Controls

Many operating systems implement system capabilities, Posix access controls (DAC/ACLs) and mandatory access controls (SELinux), each using different underlying security controls to provide individual ...
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1answer
28 views

Application proxy structure & funtions

http://postimg.org/image/76newirnv/ For application proxy, Firstly, what does it mean "A proxy is something that acts on your behalf"? Can anyone give a more detail explanation about proxy? I read ...
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1answer
33 views

Identity and Access Management (IAM/IdAM) deployment guide

I'm working on a set of applications that require authentication and authorization. Can you point me in the right direction to some architecture design for this when I want to have multiple services ...
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3answers
127 views

How secure is Windows 10 account control?

I have a Microsoft account in my machine (Admin). I set a guest account (Standard) for a friend so he can play games. Is there any way he could access my files/folders info? I mean, get data, view ...
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0answers
16 views

Log access to one specific file [migrated]

Newbie here, so apologies in advance if my ignorance outshines your brilliance. In my small business, we have a very basic network (4 PC's running Win7). We have a virtual drive on one system that ...
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4answers
769 views

encryption vs access control comparison

I have a very basic and simple question about two security concepts. Both encryption and access control are used for privacy and to prevent unauthorized users from accessing some object (eg. files, ...
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1answer
55 views

Bell-LaPadula no read no write

I'm reading about the Bell-LaPadula model. I understand the Simple Security Property and the Star Property, and I see that the model also incorporates a Discretional Security Property. My question is: ...
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3answers
6k views

Is there a secure way to have a publicly facing terminal server?

TL;DR We are looking at opening port 3389 for a terminal server all the advice I’ve seen is that its suicidal but without good explanations as to why. Is it really that bad? We are looking at setting ...
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1answer
60 views

Implement RBAC for my application

I'm beginning to work on a new web app for which I require implementing Role-Based Access Control. I've identified three Roles for my application which will be Role 1, Role 2 and an Role 3. Each user ...
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0answers
22 views

Using Nginx to block non-GET requests

I'm running a CouchDB instance on my server. A certain database within it (not the entire CouchDB instance) is exposed at a subdomain on my website via this Nginx configuration: server { listen ...
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2answers
1k views

Secure database password stored in an env variable

I need to somewhere store my DB password on my production environment to access the DB. At the moment the prod system is deployed in the cloud, so is the DB. The password, the username and some other ...
3
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1answer
70 views

Restricted Access through Box and log commands

I want to solve following problem. Please share your ideas or directly product name that capable to solve this. Our system administrators need to connect customer's servers but I don't want to share ...
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12answers
19k views

Is there a legitimate reason I should be required to use my company's computer? (BYOD prohibited)

I just got a new job at a medium-sized (~100 employees) company and one of the first things I was told is that I cannot use my own computer, because I need to be able to connect to their network, ...
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1answer
34 views

Physical Access Control Logging on a SIEM - Is it worthwhile?

The company I work for (Manufacturing) are upgrading their Physical Access Control (PAC) System, and it will come with logging that can be fed into the our SIEM tool(LogRhythm). Does anyone have any ...
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4answers
2k views

How to store data that the computer can read but not the user?

In the TV series The Office, Dwight says he uses a diary to keep secrets from his computer. I'm wondering if the opposite is possible: can my computer create a file that it can read but I can't? I ...
2
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2answers
456 views

Will a crossdomain.xml file reduce a potential security risk?

I maintain a website were users are allowed to upload files. I'm doing already some good MIME-checks, consistency checks, virus checks, blacklist checks based on hash lists, some other custom checks ...
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11answers
18k views

Prevent my site from being copied

Is it possible to protect my site from HTTrack Website Copier or any similar program? Without setting a max number of HTTP request from users.
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0answers
12 views

hash function notations and existing cryptographic hash algorithms [migrated]

I am implementing Role-based access control by referencing the paper Enforcing Role-Based Access Control for Secure Data Storage in the Cloud. In page 6, they have mentioned to choose hash functions ...
2
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1answer
64 views

What is the definition for different access attributes in object access auditing?

Though there is documentation available about configuring Object Access auditing, there is no place where I have found any documents explaining the different attributes in Object Access Auditing. Can ...
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0answers
45 views

Is FAR (False Accept Rate) a property of algorithm or a property of the system?

As known in biometrics: https://en.wikipedia.org/wiki/Biometrics#Performance False match rate (FMR, also called FAR = False Accept Rate): the probability that the system incorrectly matches the ...
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0answers
48 views

Certificate based Access Control for Pub Sub messaging

I'm extending an existing p2p/master Pub Sub framework to support additional security measures, via over the wire encryption and topic based access control. I'd like to use the x.509 certificates that ...
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1answer
43 views

How to protect EXIF data against editing/deleting in jpeg file?

Is there any option to protect EXIF data against editing or provide password protection? I came accross the idea of creating executable file from image file, so that someone can view image the way is ...
21
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4answers
15k views

Router password vs MAC filtering?

I just bought a Galaxy S4, and it didn't connect to the WIFI in my house (I have a 14$ router). After a bit of testing, I've decided to leave my connection open without a password, but added the ...
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2answers
68 views

Limit possible harm of ransomware on a fileserver

First to say: I know I need a backup and I have one of course but my question isn't about the safety of the data but about how to reduce the possible time that is needed to restore data. I'm already ...
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3answers
3k 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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4answers
2k views

Are keys or RFID tags more secure access control solutions?

Just musing to myself, what is the preferable access control mechanism in high security environments? Locks and Keys or RFID tags? Going under the assumption that the locks/keys are not knoow to be ...
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26 views

bundling session information in a binary

We are in the process of developing a desktop app. When a user is logged into the website we create a dynamic binary(.exe) and add session information to that binary which is valid for one time login. ...
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2answers
112 views

Google OAuth 2.0 and Java. Is it safe to locally store access tokens?

I Installed this Java app: https://github.com/andresoviedo/google-drive-ftp-adapter The program asks permission to see my Google-Drive files and then stores an access-token on my local harddisk. ...
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2answers
49 views

Stateful Packet Filter structure

http://postimg.org/image/o1ojanqq3/ For stateful packet filter, Firstly, why is cannot see application data being one of the disadvantages of Stateful Packet Filter? Secondly, how can stateful ...
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2answers
47 views

Packet Filter vs Application proxy

http://postimg.org/image/b1w3bujnv/ I don't understand the highlighted part in red. Firstly,Why is a packet filter is enough in a situation where traffic is busy? Secondly,Isn't application proxy ...
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1answer
41 views

Packet Filter with Access Control List

http://i66.tinypic.com/29p50zp.png Can anyone explain how to read and understand row 1,2 and 3? My understanding for row 1 is : If any inside packets want to go to outside via any source port to ...
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0answers
38 views

Protocols for transfering access control data

The company I am working for has decided to create an API for a few of the products we create here (we create physical access control solutions, card readers, key storage, intelligent door locks and ...
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4answers
8k 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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iOS keychain - who or what can access it

I have an iOS app that needs to be able to upload data in the background, and so also when the device is locked. To achieve background uploading I use information stored in the key chain. Therefore I ...
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1answer
40 views

What are best practices for secure admin access management to critical 3rd party cloud application in big companies?

I've always wondered how can we manage admin access to critical 3rd party resources (social media, SaaS CRM, etc) in big companies to mitigate: The administrator might leave the company without ...
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1answer
70 views

What kind of answer is this textbook question looking for in access control model?

I'm going over a practice question and I have trouble understanding what it's asking. Draw an access control matrix for the following Linux file system. Group A1 contains S1 and S3, group A2 ...
3
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0answers
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Work wants to create an admin account on my system that I don't have access to? [closed]

This is on a Windows 10 system, and they want to create an administrator account that only my manager will have the password to. This is apparently to enforce some new "security policies" that haven't ...
6
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4answers
4k views

Security provided through MAC filtering: Wired vs. Wireless Networks

My question refers to the following article on Wikipedia: MAC Filtering. The article states: MAC filtering is not effective control in wireless network as attackers can eavesdrop on wireless ...
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1answer
62 views

Are Linux System Capabilities Considered Mandatory Access Controls?

DAC is not mandatory because access permissions are left up to the resource owner's discretion. Mandatory Access Control (Smack, SELinux, etc) administration can only be accomplished by a process/...
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8answers
11k views

Why am I allowed to access protected Windows files when I boot Ubuntu from USB?

How come I'm allowed to reboot a computer that I don't own, put in a USB, boot ubuntu from it and then access all files stored on the drives available (even critical files such as system files on C ...
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3answers
10k views

What are the advantages/disadvantages of attribute-based access control?

An example attribute would be "employee is currently located in the US" and is trying to access a document that requires the person to be accessing the document in US territory.
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51 views

idevicerestore installation trouble

Can anyone help me figure out what im doing wrong to install this software? ``` root@kali:~/libimobiledevice# sudo apt-get install libusbmuxd-dev libplist-dev libplist++ Reading package lists... Done ...
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1answer
22 views

What are the tools/frameworks/techniques for authorizing a device accessing a web app?

I've a password protected web application (ASP.NET 4.5), and a requirement that when a registered user accesses the site from a device for the first time, I should authorize that access by sending an ...
3
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1answer
103 views

What can I do to separate users best way if they are allowed to run their ruby (python) code

I have Ubuntu server 12.04 on VDS and I allow users to run their own Rails applications on behalf their own accounts. That means: They can use any shell they want They can upload what they want, e.g....
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1answer
4k views

Looking for approach to implement attribute based access control (ABAC)

We are looking to implement Attribute-Based Access Control. While we are sold on the philosophy, there are two topics that seem to crop up: Will it lead to significant performance issues? Especially ...
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1answer
59 views

Is Linux protection mechanism implemented using capability lists?

I often get confused whether a particular protection mechanism is ACL or CL by definition. As an example to clarify this, I would like to consider the case of Linux. I believe Linux uses capability ...
5
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2answers
86 views

How to secure shared user on build server?

We have a CI server which is installed as the builduser and all tasks are executed as that respective user at the OS level. We have many teams sharing the build server which means the build user and ...
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1answer
184 views

Authorization on complex ownership

I have problem with object ownership in my web application. In my web application. There are object types: 1. Faculty 2. Student 3. Student Group 4. Student Lesson The following user roles are ...
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2answers
56 views

Is ignoring share permissions ok?

For my small home network I've found that it is easiest to setup network shares with share permissions set to Everyone: Full Control share permission and then configure the NTFS permissions according ...
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13 views

Implementation of security policy using BLP

I'm studying for an exam that covers BLP (Bell-Lapadula) and I was wondering if the following could be represented using this policy. All the examples I've found online are of a simple hierarchical ...