3
votes
1answer
316 views

Could Stock Exchange be shut down by HFT attack vector?

First of all, stock, not stack exchange. I just read this post on Krypt3ia. In short, it says that HFT attack vector in combination with DDoS is possible new nemesis for stock exchange IT systems. ...
4
votes
3answers
613 views

Preventing users from tampering with replay data [duplicate]

Possible Duplicate: Protect application from being modified This probably belongs here as much as it does belong in gamedev.stackexchange.com, but I suppose I might find better technical ...
4
votes
4answers
1k views

Can the loopback interface be hijacked?

Inspired by this question I came up with this weird idea of making what that user actually wants to prevent. So, bear with me for a little bit: Let's assume that for some reason we could make the ...
17
votes
3answers
5k views

Google Chrome Browser - Privacy Concerns

After i saw many people using Chrome i wanted to inform myself on this browser and everything concerning it as i am a Firefox user since it existed. However i am always afraid of Google being a "data ...
7
votes
2answers
299 views

What to add to a repeating security checklist?

I work in a smallish company (100-200 computers and a handful of servers) and I am trying to come up with a checklist of things to check at a regular basis, such as weekly, monthly, etc. We use ...
11
votes
7answers
5k views

What security implications are there for allowing outbound SSH traffic?

My school currently blocks outbound SSH traffic. Users inside the network cannot use Port 22, and attempting to make an SSH connection over another port is also blocked. (I'm assuming the firewall ...
2
votes
3answers
1k views

How is it possible that anonymous members still post on Twitter but aren't busted? [duplicate]

Possible Duplicate: Why is it difficult to catch "Anonymous" or "Lulzsec" (groups)? I think that something that Anonymous & other hacking groups do, is illegal and ...
9
votes
3answers
467 views

What are common/official methods of reporting spam/phishing/nasty-grams to organizations?

A user of mine just received a phishing email claiming to be the IRS. What methods of reporting are available, and what should be included?
8
votes
3answers
724 views

How is “anonymous” getting ahold of all these plain-text passwords

In the last several months there have been several publicized data breaches and public website defacements done by several different hacking groups (which the media loves to group under a single ...
3
votes
3answers
6k views

SSL verification of host name of https server

I recently found that a library I am using (specifically Apache HTTPClient) when is configured to verify the hostname of the remote server against the certificate's CN it just seems to be doing a ...
29
votes
6answers
33k views

At what point does “hacking” become illegal? (US)

Hypothetical situation: before I hire a web development company I want to test their ability to design secure web apps by viewing their previous client's websites. Issue: this situation raises a big ...
22
votes
13answers
4k views

Why do we even use passwords / passphrases next to biometrics?

In the last couple of days there were a lot of talking about passwords and passphrases, not only here, but on several blogs and forums I follow (especially after XKCD #936 saw the light of this ...
1
vote
2answers
1k views

Which encryption algorithms will be used to replace RSA when quantum computers become common? [duplicate]

Possible Duplicate: Are the encryptions "broken" with great computing power? I just wondered which algorithms will be used once quantum computers become common. Are there already ...
7
votes
3answers
284 views

Detecting OAuth malicious Implementation

I am wondering how can an end-user detect a maliciously implemented OAuth whether 2-legged or 3-legged. Particularly I am interested in those cases where the consumer requester is maliciously ...
4
votes
2answers
740 views

Is this an example of XSS attack?

A scripter sees on certain web pages it's technically possible to include markup like HTML and CSS/JS. It's technically possible to submit a javascript or iframe and have it display to the visitor ...
5
votes
8answers
1k views

How can I be sure that an intranet app is absolutely not accessible from the internet?

I am developing an intranet application using Apache/MySQL. The server hosting it does not have a public IP address itself, but can access the internet through a router. There is not any sensitive ...
8
votes
3answers
2k views

SSD (Flash Memory) security when data is encrypted in place

I'm surveying current techniques on flash memory security. I've learned that the non-in-place update of flash memories prevent us from adapting the same encryption techniques that we used on hard ...
2
votes
5answers
659 views

How do a firewall's rules for individual programs work?

I kind of know that how a firewall's rules for IP/port work, but I have no idea how a firewall deals with individual programs. In other words, how does the firewall know a program wants to access the ...
9
votes
4answers
632 views

Are there state-of-the-art techniques or theory specifically for attacking passphrases over passwords?

With passphrases becoming more and more common based on length being more important than complexity, I'm assuming there must be some work going on involving techniques aimed specifically at cracking / ...
286
votes
13answers
36k views

How is it possible that people observing an HTTPS connection being established wouldn't know how to decrypt it?

I've often heard it said that if you're logging in to a website - a bank, GMail, whatever - via HTTPS, that the information you transmit is safe from snooping by 3rd parties. I've always been a little ...
22
votes
3answers
3k views

Should I have a maximum password length?

I'm creating a webapp, and part of my authentication method is password length. Should I put one in place? (say, 50 characters?) Or should I just put a minimum length (Currently at 6). Are there ...
64
votes
21answers
17k views

How can I avoid my password being harvested by key loggers from internet cafes?

During traveling, especially in poor countries, sometimes you are going to need to use the internet at an internet cafe and you really can't be sure whether anyone has installed anything to listen to ...
15
votes
2answers
1k views

Are there some good papers (or discussions) on using Markov chains or Hidden Markov Models for password auditing/cracking?

As a programmer and language enthusiast I've been very interested in Markov chains for some time. Considering the influence of natural language on password and passphrase selection (by humans of ...
29
votes
3answers
12k views

What useful things can I do with the html5 “keygen” element?

There's a new* keygen element in the html5 spec. It's supported in major browsers excepting Internet Explorer and Safari. Here's what it looks like: <form action="processkey.cgi" method="post" ...
10
votes
2answers
1k views

What are the SQL-injections issues of parameterized queries?

I've written some code to generate an SQL query in ASP classic. I'm not sure if it's secure or not: Set adoCon = Server.CreateObject("ADODB.Connection") adoCon.Open "Provider=Microsoft.Jet.OLEDB.4.0; ...
11
votes
1answer
1k views

Any risk in using the same salt for several hashes on a user?

Right now I'm storing a salt and password_hash on the users table (pretty standard stuff). The need arose to get a secure hash of another field for a user. Is there any risk in reusing the same salt ...
14
votes
5answers
1k views

Safe way to authenticate (multi-factor authentication?) while being monitored?

(I'm trying for a bit more precise answer, particularly with regard to multi-factor authentication, than I received for "Safe way to use a computer that has spyware/keylogger installed?" on SU.) ...
11
votes
2answers
2k views

Password auditing

Most password policies require the password to be at least 8 characters long and contain symbols from at least 3 classes (lower case letters, upper case letters, numbers, other). Problem is, that a ...
8
votes
2answers
315 views

Can you tell if an attack is successful by looking at IPS logs?

In my organization, we have an IPS behind a firewall. Each time a security event is triggered, I am left to wonder if the attack is really successful. For events that are set to drop in inline, we can ...
15
votes
2answers
3k views

Tamper-proof BIOS password & settings storage with Trusted Platform Module?

In the olden days, one could trivially bypass BIOS passwords on most PCs by removing the BIOS battery and clearing the CMOS. My question is: On modern PCs equipped with a Trusted Platform Module ...
4
votes
3answers
2k views

Is there a compelling reason to ssh tunnel RDP connections?

We don't run any Microsoft products natively in our office, but there are a few folks who use a linux RDP client to access an application on remote virtual desktops with a service provider. Would it ...
9
votes
7answers
2k views

Is there any asymmetrically encrypted file system?

Is there a file system providing a directory where everybody can write, but only the directory owner can read the files? In theory it could be done by encrypting using the public key while writing, ...
9
votes
2answers
638 views

Running proprietary software on Linux safely

As a summer project, I'm looking to prevent any piece of proprietary software like many games I run from have access to my personal files. After looking a lot at sandboxing, I've decided that anything ...
-1
votes
1answer
371 views

Learning Network Security [duplicate]

Possible Duplicate: Resources to learn about security I'm a software developer. I'm interested in learning Network Security, what is the recommended books, video courses, etc that I can ...
3
votes
2answers
2k views

Is this algorithm for a random string cryptographically secure?

I've pieced together this algorithm (if it can be called that) from various bits of code I've seen online, and I'm wondering how cryptographically secure it is. It's used to generate passwords: ...
5
votes
2answers
975 views

Beginners materials for web security [duplicate]

Possible Duplicate: Resources to learn about security What materials can I study to learn web development security. I'm a web developer, I use ASP.NET, Java, PHP, and JavaScript. I want to ...
8
votes
3answers
4k views

Encryption on mobile phone - myth?

Well, about six months ago I had pleasure to meet Harald Welte and when he talked about m-banking (banking via smartphones) he said that the most people thing it's safe while, in fact, mobile ...
15
votes
3answers
629 views

Does signing out of a website ensure no-one can cookie hack?

If I click the signout link of a website, does this mean it is not possible for someone to hijack my cookie and sign in with it? While I'm logged in, is it possible for someone who has access to my ...
6
votes
2answers
3k views

Storing account numbers and sort codes online

There are a lot of questions on storing credit card information, and of how PCI SSC/PA-DSS regulations apply to such activities and systems. I have read a lot of these, but my question relates to a ...
8
votes
4answers
15k views

Security issues with allowing Dropbox installations on client PC's in our organisation

Does anyone know if there is any good reasons not to allow Dropbox installations on our client PC's? All the PC's have antivirus installed and running. I know it is an additional attack vector to ...
7
votes
3answers
552 views

Which resources can help me learn how to use metasploit?

I tried google search but I can't find good resources to learn how to use the metasploit framework. Where would you suggest a beginner go to learn about using metasploit?
0
votes
1answer
279 views

Where can I practice web-security or network-security? [duplicate]

Possible Duplicate: Servers for penetration testing I'm in a process of learning security of networks and websites. I already practised code reviewing but I want to perform exercise. Is ...
6
votes
4answers
3k views

Are there lists of most common words or ngrams used in passwords and passphrases?

I've been thinking about ways to focus brute forcing dictionary attacks on passwords and passphrases based on the assumption that certain words, combinations of letters, and combinations of words are ...
6
votes
3answers
390 views

Are there password/passphrase guessers/crackers which can utilize facts supplied about the target?

I was just reading a discussion about cracking passwords that said the person running the tool might know things about the target like the birthday of his first girlfriend's dog but the tool won't. ...
6
votes
4answers
6k views

Are the iPhone “connect the dots” passwords secure?

A popular way to login to iPhones and other phones is to use a "connect the dots" password. For those unfamiliar, it looks something like this: Is this kind of passwords secure from brute force ...
17
votes
6answers
4k views

How can I protect my computer from my potentially malicious colleagues?

So, I work in this small company (10 people) where we do stuff in programming, for various platforms. I started recently working there (2 months) right after I graduated. My work is not exactly ...
75
votes
2answers
18k views

Amount of simple operations that is safely out of reach for all humanity?

Cryptographic primitives usually assert some security level given as number of operations to mount an attack. Hash functions, for example, give different security levels for collision attacks, ...
12
votes
6answers
2k views

Best method of retiring hard drives [duplicate]

What are some typical ways you guys retire hard drives? We have a hard drive that won't mount anymore (makes clicking sounds when it tries to mount). The data on it isn't necessarily sensitive (no ...
5
votes
5answers
2k views

What password cracking software is commonly used?

I am curious to know how secure my passwords are. What password cracking software is commonly used? Preferably open source. EDIT: I am actually looking to crack my passwords used on services I ...
13
votes
2answers
7k views

Paypal Account created using my gmail account

Some time ago, probably about 6 months, somebody hacked my email account and used gmail settings to forward my emails to him/her. I noticed that, removed the forward and changed the password. Now, I ...

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