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?
28
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
440 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
20k 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
694 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?
11
votes
5answers
768 views

Non-OEM Biometric Software?

Most of us with fingerprint readers and such devices probably use the software provided by the vendor, to enable biometric OS login or single sign-on functionality. However, I've recently wondered if ...
6
votes
1answer
3k views

How to create your own RBL DNS Blacklist to prevent spam

I am getting sick of reporting the same old chinese emails to Spamcop now and would like to make my own small RBL list that I can easily add blocks of IP's to. I have a spare PC and static IP address ...
5
votes
1answer
213 views

How much protection does the Kill-Bit provide for ActiveX controls?

I have some ActiveX controls that are not supposed to run in the browser but only in my particular Front-End. I know that by setting the Kill-Bit I disable their execution in Internet Explorer and MS ...
13
votes
3answers
4k views

Nessus vs third-party scans

As part of our PCI-DSS compliance process we get scans done by a third party. Based on the form and wording of the output, it's pretty clear they're using Nessus for most of their heavy lifting. Same ...
0
votes
1answer
356 views

IR Jump Bag - What kind of bag/container to use?

I am working on putting together an Incident Response Jump Bag (detailed here). Any suggestions on what type of container/bag to use for this? It seems like a lot of little items that could be ...
6
votes
2answers
526 views

How can I authenticate a client connection in a secure way?

Let's say I have a server listening on port 1234. I have some client software that needs to be able to connect to this port. But I want to prevent malicious users from bypassing the client software ...
23
votes
4answers
9k views

Are MAC Address Filtering and SSID Hiding still worthwhile?

On a recent certification exam, I was presented with a question about ways to secure an 802.11 wireless network. It was a multiple-answer question, but the only two available answers that related at ...
16
votes
8answers
20k views

Which Instant Messaging services use or allow secure protocols, and what do those protocols cover?

We all know there's a myriad of Instant Messaging (IM) services out there. But, which of these services uses or permits protocols that actually secure your communications? For those that do, what ...
1
vote
1answer
716 views

Tutorial for SecurityCritical SecurityTransparent and new .NET 4 feature: Level 2

I need a primer for both the legacy (Level 1) .NET 2.0 security attributes and the new .NET 4 (Level 2) ones. I'm not familiar with the implications of controlling LinkDemand, stack walks, ...
6
votes
2answers
1k views

spam with my own domain

At my work we have a very tricky issue with spam. We use postfix, and recently began to receive several spams mail with our own domain. This is obviously very prejudicial for us, because many ...
69
votes
6answers
66k views

What is the difference between SSL vs SSH? Which is more secure?

What is the difference between SSH and SSL? Which one is more secure, if you can compare them together? Which has more potential vulnerabilities?
12
votes
3answers
481 views

Given SSH access, what should I do to protect a server and monitor (dangerous) user actions?

Context: Small business, mostly a software house for web applications but also some desktop software. Many external collaborators, so a variety of outside users with access to the servers. Single ...
6
votes
2answers
210 views

dealing with small businesses and security issues

I am dealing with a small business that I have no choice right now but to deal with. I do not work for this business but my personal life dictates that I use them right now. I noticed a few months ago ...
10
votes
4answers
708 views

How to define security requirements to ensure that developers… do not provide security by obscurity?

I tried to explain that security by obscurity should not be used but let's say I was challenged! I received the answer to list the known security by obscurity that I know, as a kind of bad practice ...
12
votes
1answer
345 views

What are the problems with encrypted but unsigned data?

In another question's answer, D.W. wrote: Make sure there is authenticity protection for the encrypted data (e.g., encrypt and then sign/MAC): you will need both confidentiality and authenticity ...
4
votes
1answer
3k views

How to convert IBM Domino SSL keys (private key) to the OpenSSL format?

I have a customer with an IBM Domino server. They offer a way to export SSL keys but in a weird proprietary format. Any idea on how to convert those to OpenSSL? Basically I need to upload this key to ...
3
votes
2answers
586 views

What is the proper priority/mix of (people, tools and technology, processes) to optimize defense?

I'm curious if people have different views on this and why. Update based on comments: Defend enterprises. Quotes: "Long-time blog readers should know that I don't rely on tools to defend my ...
5
votes
1answer
1k views

Windows mandatory access control: How to remove “mandatory level” label from the file?

1) How to remove "mandatory level" label from the file? I have two files, for first icalcs return Mandatory Label\Medium Mandatory Level:(NW) for second icalcs doesn't return anything (that means ...
3
votes
1answer
943 views

I'm using a Cisco ASA as a VPN endpoint. Where do the VPN clients get firewalled?

(Is this too application specific? It seems like a reasonable question that would be useful to other people...) So, I've got this ASA in front of a network that I didn't set up. It's been ...

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