9
votes
2answers
4k views

SSL Certificate revocation check

In the SSL protocol I don't see where the certificate is checked for revocation status. https://developer.mozilla.org/en/Introduction_to_SSL Is the Certificate Revocation and Status Checking not ...
10
votes
4answers
2k views

Is Facebook Connect or Twitter OAuth PCI Compliant?

We have a system that stores credit cards securely on file. We'd love to allow users to sign up using Facebook Connect or Twitter. Obviously this wouldn't be secure if we were trusting just any old ...
10
votes
3answers
3k views

Can anyone suggest good open source tools for scanning source code for vulnerabilities? [closed]

I'm particularly looking ones which detect vulnerabilities in C/C++ code. I've seen a bunch of proprietary tools but no open source ones.
0
votes
3answers
3k views

3 way authentication

Can someone please tell me what does 3 way authentication mean? I cannot understand this concept? :( Now if there are two people A and B 1.) A challenges B with a question 2.) B gives the answer and ...
3
votes
1answer
119 views

Protect file in a web site

How would you protect a password file in a web site? Is hashing the individual passwords not enough? What other steps do I need to follow?
9
votes
2answers
5k views

Encryption decryption time

Does the encryption / decryption time of rsa algorithm vary significantly with a change in key length? For example, is there a noticeable difference in encryption/decryption time between 512 bit and ...
5
votes
1answer
1k views

Clark Wilson Integrity Model: Rules

What is the conceptual difference between certification rules and enforcement rules in the Clark Wilson model? Am I on a wrong path when I assume that certification rules ensure external integrity ...
4
votes
1answer
197 views

When does one need to be concerned with leaking timing information in .NET?

According to this post, Dominick Baier was comparing two HMACSHA256 signatures and was leaking timing information upon an unsuccessful comparison. When working with .NET crypto classes, when should ...
0
votes
2answers
193 views

Create a certificate signing request [closed]

can someone please tell me a few tools that can be used to create a CSR ?
4
votes
2answers
4k views

What is an intermediate certificate authority?

What is meant by an "intermediate certificate authority?"
7
votes
1answer
3k views

Is SSL key generation client-side, server-side, or both?

Who generates the session keys for a SSL symmetric encryption? Is it the client for both client and server where client generates part of it while the server generates the other part?
3
votes
1answer
1k views

Does the Ophcrack LiveCD require hash collection via programs like pwdump?

When I used the Ophcrack LiveCD recently, the program automatically ran without me manually loading any hashes. Question is: If Ophcrack does not automatically find hashes, how can I go about ...
0
votes
1answer
154 views

Does using many XML parsers (XDocument, XMLDocument) from the public Internet increase attack surface area?

I am coding an anonymous WCF service that allows others to post XML into it. Does using different kinds of XML parsers XDocument, XMLDocument, or even 3rd party parsers increase the attack surface ...
10
votes
1answer
858 views

Relative importance of CHROOT for web servers

I have read extremely mixed opinions on the process of chrooting for a web server (non-shared environment). Some people swear by it, yet others say that it isn't as secure as everyone says. Given ...
7
votes
5answers
1k views

Master thesis topic - mod_security

I've been playing with mod_security for some time and I'd like somehow to use it in my master thesis. I don't know exactly how this work could be more interesting than describing what mod_security ...
46
votes
4answers
11k views

Why should one not use the same asymmetric key for encryption as they do for signing?

In an answer to a question about RSA and PGP, PulpSpy noted this: It is possible to generate an RSA key pair using GPG (for both encryption and signing -- you should not use the same key for ...
10
votes
2answers
27k views

How is PowerShell's RemoteSigned execution policy different from AllSigned?

I'm still pretty new to PowerShell, and recently read this in a blog posting about creating and using PowerShell scripts. To prevent the execution of malicious scripts, PowerShell enforces an ...
8
votes
6answers
527 views

Doing a demo about open wireless networks exploiting with Firesheep

A collegue and I have been asked to do a demo where we show off stealing Facebook sessions with Firesheep. I've never used Firesheep before myself, but I reckon it should be a simple task. I know the ...
19
votes
4answers
3k views

Reverse engineering malware/viruses

Assuming a machine has malware, regardless of how it got there, one thing I would like to learn to do is to take the binary file and reverse engineer it to see what the malware is doing/has already ...
4
votes
3answers
198 views

Most informative DEF CON talk?

I didn't make it to DEF CON this last year... I'd like to know what you thought was the most interesting/informative presentation and possibly a link to more information on the topic. [mod - ...
10
votes
3answers
3k views

How does an SSL server prove its identity?

This document says that a challenge response authentication proves the servers identity. But is a man in the middle attack still possible if the client does not verify domain name ? Please help me ...
2
votes
2answers
157 views

What are the advantages of sequential signing

What the advantage of sequentialy signing a document? That means signing a document by two people in a sequential manner?
27
votes
4answers
16k views

How to achieve non-repudiation?

If I have a message that I need to send to another person, how do I achieve non repudiation ? Is digitally signing the message sufficient ?
28
votes
9answers
2k views

I see entry level security skills as a problem for industry - what can we do about it?

Okay, so we push corporates to improve security, and provide training to IT staff and awareness presentations to CEO's etc, but each year a new batch of graduates are brought in to companies as others ...
4
votes
1answer
537 views

Data loss protection in software artifacts

Data loss protection is a major concern to every industry. The software engineering process involves multiple points for potential data loss, as a number of parties are involved other than the client ...
3
votes
2answers
318 views

Which PCI SAQ would you say to use if you are neither a merchant nor service provider?

Low down: This client does zero with credit card data (no processing, no passing of it, nothing), but they do have a device often placed on the same network segment of a POS (Point of sale) system. ...
8
votes
3answers
6k views

How can I enumerate all the saved RSA keys in the Microsoft CSP?

I have an application that is creating several keys and storing them in various stores (in this case the Machine store). How can I enumerate all the keys on a given Windows system? ...
-1
votes
2answers
439 views

What can one define as quality criteria for an XML Schema?

One of the usage of Input validation, is to be protect against XSS. In case one would need to define best practice for the functions validating the input, then some (which I am calling quality ...
4
votes
1answer
712 views

Why does Bouncy Castle have a separate download for the IDEA algorithm?

I'm looking at downloading the C# binary for Bouncy Castle and see two downloads with source code. One has the IDEA algorithm, the others presumably not. http://www.bouncycastle.org/csharp/ Why ...
15
votes
7answers
8k views

What are the realistic, and most secure crypto for Symmetric, Asymmetric, Hash, Message Authentication Code ciphers?

I'm interested in updating this two pronged question for 2011: What cryptology is most appropriate for low-powered devices (such as a cellphone), and yet still effective? What cryptology is most ...
17
votes
2answers
7k views

How does RSA encryption compare to PGP?

On this answer ck says RSA and PGP are different. What you are essentially asking is how do I run my petrol car on diesel? The answer is you can't. I would be interested in a more ...
3
votes
1answer
3k views

How do I use C# to encrypt/decrypt data where the private key is on a smartcard, hardware security module, TPM chip etc

Is anyone aware of a C# code sample to interact with smartcard, hardware security module, TPM chips (etc), that will allow me to encrypt and decrypt data? My goal is to allow my application to ...
6
votes
3answers
1k views

Safe implementation of sharing encryption secrets (username, password) in the cloud

I'm building a multi-tenant (cloud) environment that needs to push out (or make available for download) configuration files for agents (background services) that receive this information. One of the ...
36
votes
5answers
19k views

Servers for penetration testing

I am learning to use Metasploit as part of one of my college lessons. As you may know there are software builds like NOWASP (Mutillidae) or Damn Vulnerable Linux that allow you to exercise on pentest ...
6
votes
8answers
693 views

What is the vulnerability in my PHP code?

A website of mine was recently hacked. Although the actual website remain unchanged, they were somehow able to use the domain to create a link that re-directed to an ebay phishing scam. I've taken ...
19
votes
3answers
2k views

Where to report malicious URLs, phishing, and malicious web sites?

I recently discovered that my web site was hacked: there was a HTML hidden div selling about shoes... I Googled the text in question and voila: thousands of sites have been hacked. Check this out: ...
1
vote
2answers
863 views

Possible to use CAPICOM to extract current SSL certificate?

I'd like to extract the current SSL certificate from the current browsing session, and read the properties. I'd like to do this at the Browser, for content that is delivered from the server. I'm ...
11
votes
5answers
2k views

Storing private asymmetric key in application binary?

I would like to give a daemon-style process (i.e. no user interaction) access to a shared secret key so that it can access a shared, encrypted data file. User applications accessing the same encrypted ...
4
votes
1answer
740 views

How to prevent CSRF if you want to include Flash plugins in your form like Uploadify in your form?

What is CSRF? I need a basic definition that is not just lifted from Wikipedia. I understand SQL injection, XSS, cookie poisoning, but I just cannot wrap my mind around this. I am using a ...
7
votes
3answers
3k views

User “home directory” on iPhone, Android, Windows mobiles and Blackberry

Is anyone aware of any mobile (iPhone, Android, Windows mobiles and Blackberry) Operating System that support multi users? I am not aware but I thought it is worth double checking. Off course, in ...
28
votes
8answers
3k views

If someone breaks encryption, how do they know they're successful?

Let's say I have a file containing a random bunch of bits and then I encrypt it using some modern algorithm (Blowfish, AES, or whatever). If someone captures the file and mounts a brute force attack ...
46
votes
4answers
12k views

Is posting from HTTP to HTTPS a bad practice?

Working on the assumption that SSL serves both to encrypt data and to provide assurance as to the identity and legitimacy of the website, should the practice of providing a logon form on a page ...
29
votes
11answers
1k views

Does hashing a file from an unsigned website give a false sense of security?

Consider this. Many websites with software downloads also make available MD5 or SHA1 hashes, for users to verify the integrity of the downloaded files. However, few of these sites actually use HTTPS ...
19
votes
4answers
1k views

Biometric versus other Two Factor Authentication Mechanisms

Over the years biometrics is the go-to movie authentication mechanism, but in the real world I'm getting conflicting opinions about it. Everything I've learned shows that biometrics are flawed ...
0
votes
0answers
273 views

Is there software available for two-factor, biometric authentication to the OS?

Many fingerprint readers and other biometric authentication devices come with software for single-factor authentication to the OS. Is there any third-party software (F/OSS or otherwise) available for ...
4
votes
4answers
558 views

What particular concerns should one bear in mind when wardriving?

I'm considering starting a neighborhood-wide wardrive, with the objective of raising awareness to the risks of running unsecured wireless networks. Right now, I'm still in the planning stages of this ...
8
votes
6answers
7k views

One Time Passwords. Using OTP at Windows, Ubuntu and internet sites

my question is this: Is there a way (software,hardware/token or web-ware) to use One Time Passwords in the following scenarios: Logon to my pc/laptop (windows or ubuntu) Logon to sites with OTP ...
0
votes
2answers
318 views

is there any solution to manage network forensic, SIEM and intelligence analysis and investigation in a enterprise network?

Anyone have experience in a solution to manage in an integrated view this functionality ? - network forensic - SIEM - intelligence analysis and investigation Like Niksun or Solera solution do ? I'm ...
17
votes
4answers
4k views

Protection against account lockout DoS

Any ideas on how to protect against the following scenario? Company x uses active directory for authentication of it's employees. The company has multiple authentication points that are semi-public ...
13
votes
2answers
7k views

How do Intrusion Detection Systems (IDS) work?

How do Intrusion Detection Systems (IDS) work? As I understand it, they monitor network traffic but what exactly do they look for? How can they tell apart regular activity from intrusions?

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