11
votes
6answers
6k views

Is tokenless (specifically SMS) 2FA a security compromise over OTP tokens?

I've been looking into the various pros/cons of tokenless (particularly SMS based) and traditional token based two-factor authentication (think RSA SecurID). After doing some research, I think I have ...
29
votes
2answers
6k views

How do I use Markdown securely?

How do I use the Markdown library safely? What do I need to do to make sure that its output is safe to include into my web page? I want to allow untrusted users to enter content (in Markdown format)....
7
votes
3answers
4k views

HIDS detection system and registry changes

I use OSSEC HIDS to monitor XP and Windows 7 Operating Systems. When OSSEC flags changes in the Windows registry, I have no idea where to go for to look for information and identify if the changes ...
6
votes
4answers
2k views

What's the safest way to access my US-based bank's website from within Mexico? VPN vs SSH vs HTTPS?

I will soon be moving to Mexico and living there for an extended period. During that time I will need to occasionally access my US-based bank's website. I'll always be connecting using my own laptop, ...
3
votes
2answers
593 views

Why is the diffusion property important in hash functions

I have always heard that A change in just one bit of the original text shall change half of the bits of its hash. I think this property is called the diffusion property. However, I wonder why ...
4
votes
3answers
261 views

How (if at all) can an attacker manipulate an already established SSL/TLS Connection?

First off, this is a purely academic question. My first answer would be that he cannot since he does not have the session key. Could he at least kill the connection, such as by sending spoofed FIN ...
4
votes
3answers
470 views

Why don't more services offer encryption for email notifications?

I understand that using encryption for email isn't particularly mainstream (a fraction of a percentage of users, at a guess). Is that the only reason that banks and other sensitive companies do not ...
-2
votes
2answers
331 views

Is Wi-Fi Protected Setup still safe? [closed]

According to this paper it is cracked: http://sviehb.files.wordpress.com/2011/12/viehboeck_wps.pdf Using Reaver.
0
votes
4answers
2k views

Prevent Users from Downloading Javascript, Images

A lot of times I see that resource XXXXX.gif or XXXXX.js can't be saved when I try to save a webpage in Firefox. So this made me think, can I implement a similar thing for my website as well? ...
5
votes
2answers
661 views

intrusion detection on own hotspot?

Is it possible to detect failed logins on the hotspots you create with your windows/linux laptops? So you can detect some dumb brute force/guessing attempts? For example, a log like this: TIME DATA - ...
5
votes
3answers
1k views

What data should be logged?

Imagine having a web application. You then decide that you want to create your own logging system, for whatever reason. What data should be logged to put a very good logging system in place? I was ...
1
vote
2answers
4k views

Snort false positive?

I've set up snort and am configuring it for my network. I have one vpn server making a connection to my dns/AD server. This connection sets off: GPL SHELLCODE x86 inc ebx NOOP The payload is as ...
-1
votes
3answers
3k views

HTML payload rewriting?

I read an article about some hotel injection ads to every webpage using some router: http://justinsomnia.org/2012/04/hotel-wifi-javascript-injection/ Would it be possible to do this with any existing ...
5
votes
4answers
420 views

Voting System, is there a hole here?

I had this idea a few years ago and improved it today as I notice a hole or two. I believe I have the system down right but If there was a hole the first time there may be a hole this time. I believe ...
2
votes
1answer
206 views

Why does Paypal send TWO verification payments not just ONE?

The process would be easier if there was only one payment, but there must be some security or financial reason for Paypal to send you two random payments
6
votes
3answers
9k views

OSCP certification for junior pen tester position any good?

Currently finishing my degree in computer security and have a few years experience in IT support and want to get into a junior pen testing job or similar. Would the OSCP certification do me any ...
2
votes
2answers
1k views

Keeping valuable algorithms secret

Given a securities trading algorithm that is very effective and thereby very valuable, how do you keep it secret and protect it from theft or copying? What techniques or architecture is the best? The ...
4
votes
2answers
568 views

Is there a spreadsheet/template for Mapping WebServices Authorization Rules?

I'm looking for a spreadsheet/template that allows the business-rules (i.e. 'who has access to what') to be mapped, visualized and analyzed. In the past I have created a couple of these (some even ...
1
vote
2answers
323 views

Is it okay from a security perspective to read foreign (untrusted) cookies in a trusted network?

From a security point of view, is it okay to read foreign (untrusted) cookies (from 3rd parties on the Internet) on your internal (trusted) network, or should you only read them within the DMZ areas ...
4
votes
2answers
1k views

Security web scanner tool for IIS/SQL Server

I'm trying to do penetration testing of our ASP.NET web-site to check for security loopholes (specifically for SQL injections). We bought a commercial web scanner tool (IBM Rational AppScan), however ...
1
vote
1answer
163 views

Reliability of DNSBLs for Stopping Forum Spam

I know that certain DNS blacklists are considered more reliable than others, in that they don't have as many false positives. I run a forum that is known to be spammed, and I've installed a mod to ...
21
votes
2answers
34k views

Advantages of client certificates for client authentication?

I'm no security expert, so please just ask in a comment if I haven't made my question clear enough for an answer. The Scenario We have a server running WCF services, and a number of clients ...
5
votes
2answers
5k views

How to make an iPhone app HIPAA compliant?

How do we make a iPhone app HIPAA compliant. Our website is HIPAA compliant since we use encryption at rest, we use SSL, and other security provisions. Will using a SSL connection give us the ...
1
vote
3answers
220 views

Maintain User Privileges After Shutdown in Windows XP?

Is it possible, in Windows XP, to maintain user privileges of a command shell after a reboot? For example, I'm running as a non-privileged account LocalMachine\Pete, but have a shell running as ...
1
vote
1answer
1k views

SRP 6a implementation C#

I'm trying to implement the SRP crypto; 6a. However I'm not familiar with the cryptography and it's computing. I'm using the public implementation of the BouncyCastle lib, but I have no idea how it ...
2
votes
2answers
233 views

Has networking using multiple “unrelated” connections to share an encrypted data stream been researched?

I'm not exactly an expert, so I'm hoping you'll give me the benefit of the doubt and try very hard to make sense of this... I've been thinking about a simple measure, which I'll call Multiple ...
1
vote
2answers
1k views

What is the disadvantages of storing user role including admin in a session variable?

In my projects I always fetch roles from DB and store them in a session variable, then to check If a user has access to admin pages I just check the session. Let's consider I use a private hosting ...
4
votes
3answers
16k views

Is it possible to create a custom login page for your own Wi-Fi hotspot?

How do I create my own open Wi-Fi hotspot/access point with a custom login page similar to those found in commercial hot-spots? The page would be accessible using Windows or iOS, and users would have ...
1
vote
4answers
344 views

Is e-mail sent from a Gmail address to another Gmail address encrypted?

Gmail provides an SSL connection and also encrypts the entire session by default. But if you send a mail, once it leaves gmails servers, it can be read at any point on the internet. But what about ...
3
votes
2answers
2k views

How secure is static key encryption?

I was looking at using the encrypt option in an application but I've read some comments saying it is not so secure because it uses static keys. How easy is it to break static key encryption? Does it ...
-1
votes
2answers
191 views

Is it Illegal to break out of a forum post by using CSS for example?

Is it illegal in the UK to post styling that breaks out of a post? For instance, if styling were allowed here and I were to use it to change some stackexchange pictures on this page, would that be ...
-2
votes
3answers
480 views

Why bother with attack detection?

The question below goes from a wrong assumption that attacker is able to spoof IP when making HTTP connection. But attacker isn't able to spoof IP if he doesn't have direct access to connection ...
2
votes
2answers
2k views

Logging and Metrics for DEP, EMET, and Related Mitigations

Is it possible to collect metrics or generate alerts when one of EMET's suite of mitigations prevents code execution? Ideally I'd want to be able to collect and analyze data to support statements like,...
4
votes
1answer
8k views

what does it mean to be setuid root?

I am reading Tanenbaum's Modern Operating Systems 3e. He says "Suppose that the program being attacked [with malicious code] is SETUID root in UNIX (or has Administrator power in Windows). The [...
1
vote
2answers
2k views

IP Spoofing a threat?

Quick Security Question if i may. We have an internal Intranet system which is only accessible from a few internal vlans, our main external firewall blocks all access to the internal webserver – or ...
7
votes
2answers
8k views

Is Buzzdocks a security threat?

A BuzzDock toolbar suddenly appeared in my Chrome browser. I definitely did not install it nor do I remember installing any crapware. It is not unknown to the internet community (Example 1, Example ...
5
votes
2answers
230 views

What are the risk tradeoffs of all-in-one “smart” IDs vs. using a separate hardware authenticator?

In many organizations these days, employee IDs are very mutli-functional. They can serve as: Visual identitiy verification. (Including employee photo, name, ID number, and other details on the ...
4
votes
3answers
2k views

What sort of mathematical background is necessary to learn ethical hacking?

Do I need to be a "mathematical whiz" to be a hacker?
0
votes
2answers
2k views

What risks do I have to consider when encrypting server side as opposed to client-side?

I am looking at encrypting user data however performed on the server as opposed as on the client. What risks do I have to consider and if so how do I limit such risks? The reason we are looking at ...
6
votes
1answer
1k views

Cutting and sniffing fiberoptic cables - time before detection?

Suppose you'd cut a fiberoptic cable with two razor sharp mirrors, reflecting the traffic out into your sniffing device and then back into the wire again. How fast would you need to get the traffic up ...
19
votes
3answers
16k views

Can I trust the source IP of an HTTP request?

As far as I've understood, if you try to issue a HTTP request with a spoofed IP address, then the TCP handshake fails, so it's not possible to complete the HTTP request, because the SYN/ACK from the ...
2
votes
1answer
488 views

Checking if Mod_Rewrite is Enabled Remotely

When pentesting it is useful to know when apache mod_rewrite is enabled. But when one comes across a web server that does not utilize PHP it is difficult to tell if mod_rewrite is enabled considering ...
10
votes
5answers
9k views

What does key signing mean?

What exactly does the "key signing" mean? So for example I have a private/public GPG key so that people could send me encrypted e-mail, because they know my public key. But: what does key signing ...
2
votes
3answers
8k views

Set Cookie in XHR response : How different browsers handle this?

If I send a XHR request to example.com and response has Set-Cookie: dummyCookie=dummy in response. How different browsers handle this? Does any version of any browser set the cookie for example....
1
vote
2answers
663 views

AVG Website Scan, Chance of 'Potential Threat'?

In a recent question I asked about investigating websites for viruses. The answers were very helpful, I ended up using the AVG website scanner. First I used it on our website and found it was clean, ...
2
votes
3answers
281 views

Emerging Standards for file transfer and integrity check?

What are the emerging standards for file transfers (including online transactions)? How about for file integrity checks?
15
votes
3answers
700 views

If I have two identical linux virtual machine images, will they generate identical random numbers?

A really noob question, I know, but something I was wondering about this morning. If this were the case, would they encrypt things identically? Or maybe someone could direct me to a helpful research ...
2
votes
2answers
5k views

How to check if a website is sending out a virus?

I'm a webmaster at a company without much knowledge of IT Security. We are running 6 computers connected to a central server that also hosts our website. 3 out of 6 people in the office have gotten ...
3
votes
2answers
612 views

Are these standard OAuth2 flows? (what are their names?)

I'm developing a B2B platform, where other developers (our customers) will build shop-front style apps that leverage our platform. We expose a REST based API which our customers either call directly ...
2
votes
1answer
157 views

ISP security compared to enterprise

I've just started reading IT Security, and found some interesting reads on man-in-the-middle and different types of "attacks" that could be used by an enterprise to intercept communications on their ...

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