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4
votes
2answers
328 views

How can IA-5(1)(b) be enforced on non-Windows systems?

I have a question posted already for this issue in Windows systems, and thought that non-Windows systems should perhaps be covered separately. In NIST SP 800-53 Rev. 3, IA-5 is the control addressing ...
52
votes
6answers
11k views

How can a system enforce a minimum number of changed characters in passwords, without storing or processing old passwords in cleartext?

In some environments, it is required that users change a certain number of characters every time they create a new password. This is of course to prevent passwords from being easily-guessable, ...
7
votes
2answers
2k views

How can IA-5(1)(b) be enforced on Windows systems?

Note: I've also posted a question for this issue on non-Windows systems. In NIST SP 800-53 Rev. 3, IA-5 is the control addressing "Authenticator Management". The requirements in this control include ...
45
votes
2answers
22k views

HMAC - Why not HMAC for password storage?

Nota bene: I'm aware that the good answer to secure password storage is either scrypt or bcrypt. This question isn't for implementation in actual software, it's for my own understanding. Let's say ...
56
votes
17answers
4k views

Can we still provide confidentiality when cryptography is outlawed?

In certain jurisdictions, use of cryptography by the private sector is limited: e.g. there are reports that in the UAE and other countries not all of the encryption capabilities of the BlackBerry are ...
6
votes
2answers
601 views

Patching Mechanism and security holes

Let me clarify two methods of patching softwares and then I will go straight to the question: I am using both MAC OS X and Windows and different mechanisms of these two famous operating systems in ...
5
votes
2answers
2k views

Password History/Password policy

I'm referring to "remembered" password that the domain keeps so a user cannot reuse that password until it has expired in what was set at Password Policy on DC (W2003/W2008). Where is password ...
4
votes
2answers
196 views

Question about the SessionLock paper

Some time ago there was a big fuzz over Firesheep: by listening to wifi traffic your login session can be stolen which is very bad because now somebody can e.g. send emails on your behalf. Some people ...
3
votes
3answers
1k views

Ranking of web security conferences

I have prepared a paper to publish in a web security conference. How can I know the ranking of available conferences to know which conference is better? For example, should I look at their sponsors?
19
votes
1answer
5k views

Collision rate for different hash algorithms

Is there any collision rate measure for popular hashing algorithms (md5, crc32, sha-*)? If that depends only from output size, it's quite trivial to measure, but I suppose that depends also of ...
6
votes
3answers
283 views

What indicators did OWASP use to end up with OWASP Top 10?

I was asked by a student how OWASP Top 10 are ranked, based on which indicators: is it severity? ease of exploit? ease of implementing their countermeasures? ... Knowing that each of these ...
12
votes
1answer
237 views

Is there an organization that reviews/approves crypto implementations?

As I understand it, NIST approves crypto algorithms but doesn't cover specific implementations. I think I've read about IEEE approving hardware implementations of, e.g. AES, but I can't think of any ...
22
votes
3answers
10k views

MySQL OLD_PASSWORD cryptanalysis?

The password hash used for MySQL passwords prior to version 4.1 (now called OLD_PASSWORD()) seems like a very simple ad-hoc hash, without salts or iteration counts. See e.g an implementation in ...
3
votes
2answers
466 views

Legal process for suing joejobber? [closed]

I'm currently being joejobbed, and want to sue the joejobber. Details: I have real damages: the joejob causes me to receive fake bounces, which: stop/delay my receipt of legitimate mail, since ...
9
votes
2answers
3k views

MIME sniffing protection

As it is known, older versions of MSIE (before 8) have a nasty habit of treating images as HTML if they "look like" HTML, which can lead to nasty vulnerabilities for sites that allow people to upload ...
20
votes
4answers
9k views

Is Schneier's “Applied Cryptography” current?

I've been recommended Bruce Schneier's 1994 book Applied Cryptography as an introduction to the use and the inner workings of cryptography. Is this book still current and a good introduction?
18
votes
5answers
12k views

Encrypting files in a windows environment

We have certain client data which must be encrypted at all times. The part we have been struggling with is encrypting files on network shares. Currently we have network folders encrypted using PGP ...
7
votes
4answers
590 views

What is the solution to Schneier's Law?

Schneier's law (which should probably be called Babbage's Law). States that: Anyone, from the most clueless amateur to the best cryptographer, can create an algorithm that he himself can't ...
8
votes
5answers
2k views

Should one sign and encrypt using the same key? The Azure Training Labs are taking this approach

I'm taking the Azure lab LoadBalancing with WCF and recognise what I have been told is bad from a security perspective, but am not sure if it applies here. Can someone look at this code and tell me ...
10
votes
2answers
447 views

Anyone know of security tools utilizing google's prediction API?

http://code.google.com/apis/predict/ From google: What is the Google Prediction API? The Prediction API enables you to make your smart apps even smarter. The API accesses Google's machine ...
20
votes
10answers
8k views

List of good security podcast one should listen to

I'm a hard core dyslectic who wants to read up on all things security without the reading part. So I want to know what good high quality security podcasts are there? I'm interested in almost ...
1
vote
4answers
5k views

How To - Learn basic hacking skills? [closed]

I'm interested in learning some basic hacking; and I've read online that Linux is a good place to start. Although, I've been a Windows user for as long as I can remember. So I was hoping I could get a ...
5
votes
2answers
1k views

How to submit credit card info to a separate server/website (PCI)

My company has a website/service that stores/processes credit cards and is PCI compliant (Site A). We also have websites with storefronts that need to submit credit card data to that site for ...
7
votes
1answer
2k views

Security Operation Center (SOC)

I am looking for resources and details on establishing a security operation center (SoC) or network operation center (NoC) based on ITIL or any other applicable regulations. Where can I find good ...
7
votes
8answers
493 views

Topics for SecureCoding course in C

So I was asked to put together a syllabus for a series of courses on the basics of secure coding, for a programming team. Though the time constraints are a bit... constraining, I'm working around that....
2
votes
2answers
9k views

aircrack-ng under Win7 — possible?

What needs to be installed to get the full aircrack-ng suite (or the closest possible equivalent) working under Win7? Should you use VirtualPC, VirtualBox, or VMware Workstation for this? Should you ...
8
votes
1answer
1k views

Linux wireless hacking book

I am looking for recommendations on a good wireless hacking book. I would like something more focused towards the defensive, but a healthy knowledge of both would be great. I would also need it to go ...
6
votes
2answers
2k views

What is more secure: Many subdirectories, or many subdomains?

I have 3 websites that could be configured as a "VirtualApplication" in servicedefinition.csdef: www.mydomain.net/enroll www.mydomain.net/admin www.mydomain.net/ ... or I can configure them as a ...
7
votes
4answers
1k views

Are there consumer-grade VPN services that support two-factor authentication, like SecurID?

I'd like to increase my VPN security, and Google hasn't turned up anything with regard to VPN services and SecurId. Does anyone know of services like this?
6
votes
6answers
2k views

How to protect data on a thumb drive

So I had a scare this past week (couldn't find my thumb drive) and figured I'd better put in some protection on my thumb drive. What is the best way to encrypt the data on the thumb drive? I am a ...
5
votes
1answer
682 views

Is storing a private key in a device as it was done in AirPort Express the right solution?

Here's a story about how one guy reverse engineered AirPort Express and obtained the private key that was used to prevent cloning the device ability to stream audio to approved devices only. So ...
3
votes
1answer
7k views

strongswan setup for ipsec environment

I have created two virtualbox ubuntu clones for the purpose of setting up a test strongswan ipsec network; I'm trying to follow this guide. The virtualbox machines are on a bridged adapter and i ...
162
votes
9answers
143k views

How secure are virtual machines really? False sense of security?

I was reading this CompTIA Security+ SYO-201 book, and the author David Prowse claims that: Whichever VM you select, the VM cannot cross the software boundaries set in place. For example, a virus ...
6
votes
3answers
1k views

Patent free symmetric-only key exchange protocols?

I am working with a networked embedded device with AES-128 and no public key cryptography (1KB RAM, 8KB flash). At install, the device is pre-loaded with a longterm AES-128 key known also to the ...
5
votes
3answers
523 views

How can I detect users that have requested AD Administrators to reuse an expired password?

There is a trend among companies I've worked at where administrators (or helpdesk folks) give a user a courtesy extension of the old expired password... rather than forcing the user to change it. ...
4
votes
1answer
1k views

Security Risk of Disabling forceguest in non-AD Environment

Our application group is looking to deploy a product which requires that we disable forceguest in HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\Lsa. We are running on a Novell network (I know, I ...
11
votes
2answers
4k views

Data Encryption and Key Management in C#

Which route to take, what are the pros and cons, which is more secure.. Generate AES key, encrypt the data with it and then encrypt the AES key with RSA, save the encrypted data and encrypted AES key ...
4
votes
1answer
614 views

How does the “Service Identity” feature of Azure ACS compare (and contrast) to a real IDP?

It appears that the ACS has IDP-style features within the "Service Identities" section. How does the ACS treat these in comparison to a real IDP? What is missing? Some examples I'm thinking of ...
6
votes
1answer
6k views

Command line Nessus/OpenVAS or NSE to find specific vulns?

Which methods do you use to quickly scan a network for certain vulnerabilities? I read in the O'Reilly book Network Security Tools that Nessus had the ability to test for one vulnerability only, but ...
14
votes
4answers
2k views

Is Steganography considered encryption and subject to USA export restrictions?

I have written an application for Apple's iOS which embeds messages in JPEG files using steganography (see http://en.wikipedia.org/wiki/Steganography). For the purposes of this question lets assume ...
14
votes
7answers
6k views

Why can an encrypted private key be brute forced?

When using SSH keys to authenticate to a server for remote access, why is it possible to devise the true key and therefore the passphrase from an encrypted private key, without checking each guess of ...
11
votes
2answers
6k views

Encrypting with Mongo

How can I achieve the following goals? All compute and storage to be located in the cloud. Encryption in transit of all data between web nodes and db nodes running MongoDB. How to set up tunnels? ...
5
votes
2answers
2k views

How do Azure ACS 2.0 security features compare to ADFS 2.0?

I'm configuring my relying party (a website) to use either ADFS or Azure ACS 2.0. ADFS 2.0 has some interesting features such as Token Replay prevention (in the SQL version) and may have other SAML ...
2
votes
2answers
458 views

DNS access limitations

Im working on a script that's going to talk to a DNS on a LAN that have information about local domains. And I believe its blocking my requests. So my question is: How can you limit a DNS server to ...
5
votes
2answers
216 views

Complexity of web certificate attacks

I heard a while ago about someone exploiting md5 weaknesses to create a web certificate with the same md5 that a different certificate has. They were able to create a certificate through bad issuing ...
4
votes
2answers
3k views

Giskismet query, how to select specific data?

I’m basically trying to get some stats from my war drive kismet database using giskismet but I’m finding it difficult to get specific data. Things I'm trying to do: Count how many wireless BSSID’s ...
7
votes
4answers
6k views

Does default ModSecurity protect enough against XSS?

It's been a few years since I mucked around with modsecurity... Will simply installing the package with the default rules provide enough validation to prevent any (okay, let's be honest - best we ...
82
votes
4answers
57k views

What is the use of a client nonce?

After reading Part I of Ross Anderson's book, Security Engineering, and clarifying some topics on Wikipedia, I came across the idea of Client Nonce (cnonce). Ross never mentions it in his book and I'm ...
18
votes
5answers
2k views

How should passwords be stored if they must be recoverable?

By "encrypting" passwords you are violating CWE-257: Storing Passwords in a Recoverable Format. But this is exactly what the French government wants. They want to be able to obtain the passwords of ...
2
votes
3answers
292 views

Identify client based on computed hash

I'm currently developing a web application which will serve data to iPhone clients. In order to be the owner of the data, I don't want other clients to be able to get it. I thought I could use a ...

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