3
votes
3answers
326 views

Do on-demand SSL certificates exist?

A few days ago, I visited an SSL protected website. Since Safari complained about the SSL-certificate, I did a short inspection: The certificate was issued by GoDaddy in just the minute I ...
1
vote
2answers
2k views

SSH Access using private keys

I am trying to practice ethical hacking in my own lab. I have got limited shell in a fedora box in addition I am able to read root files like /etc/shadow trough another vulnerability. Now, I need to ...
4
votes
1answer
1k views

Different SSL states as seen by Safari, Chrome and Firefox

Today, I visited some sites of the German DHL group. While Chrome and Safari complain about an invalid certificate of Firefox accepts it. Which one is right, which one is wrong? Which decision ...
2
votes
1answer
2k views

Open source video conferencing software with encryption [closed]

A couple of friends and I are looking for an open source video conferencing software. We'd like to run the server on a Debian box, but the clients are Windows machines. Most importantly, it should ...
2
votes
4answers
214 views

How does Eve monitor and obtain ciphertexts?

Throughout my readings on cryptography, Eve is always assumed to have the capability to be a passive listener and obtain every message exchanged between two communicators. How can one demonstrate ...
-1
votes
1answer
193 views

Benefit of having strict ACLs [closed]

My company uses strict ACLs for the connection between two boxes. What are the benefits of these?
0
votes
1answer
85 views

Payload authentication + HW-SW Binding

I want to authenticate a (2nd stage) bootloader during the boot process using a symmetric key, which is derived from HW properties of the platform the bootloader is running on. Thus, I want to bind ...
1
vote
4answers
355 views

Spam title includes unusual words from my recent emails

Occasionally, I get spam that includes in the subject line an unusual name or word that appears in other (legitimate) messages I recently received. Perhaps a coincidence, I thought, until it happened ...
0
votes
1answer
108 views

How to track MAC policy violations back to HTTP request?

Suppose there is a web application under public load that runs under a very restrictive MAC (e.g., SELinux, TOMOYO, Grsecurity) policy. Suppose we detect and log a MAC policy violation like a file ...
85
votes
8answers
8k views

Do we need to logout of webapps?

A quick Google search doesn't reveal whether it is important to logout of webapps (online banking, Amazon, Facebook, etc.), or if I am safe just closing the tab or browser. I am sure I heard on some ...
13
votes
3answers
14k views

How secure is Android's facial recognition?

Android supports using facial recognition for unlocking your phone. How secure is that mechanism? For instance, if someone has a good quality picture of your face, can they defeat the facial ...
3
votes
1answer
1k views

Fuzzer causes crash. Now what?

Can anyone point me in the direction of some good tutorials regarding how to identify the type of vulnerability as reported by !exploitable and where to go from there? Essentially I've got myself a ...
2
votes
1answer
353 views

Kismet Output Shows 3 Possible Encryption Options, Which one?

Ran into an interesting situation with Kismet and Airmon-ng while observing a client wireless network. Basically, I'm observing the network using airmon-ng, and I have my BSSID and frequency set to ...
-1
votes
2answers
173 views

Linux: Blocking outside attempts at attacking computer

in the past when I wanted to block outsiders from attempting to start connections with my Linux machine's various TCP services, what I was told to do was to add this line to /etc/hosts.deny: ...
0
votes
1answer
867 views

Is this password hashing + salt method the most secure way possible? [duplicate]

I am just wondering what all the security experts think of my method for password hashing. I want to come up with a method I can use for all my future web development projects. First I create a ...
4
votes
3answers
1k views

Forgot Password? - sends email with plaintext password

A "reputable" education company that my university utilizes for it's Physics course online materials sent my plaintext password in an email after using the Forgot Password? tool. I know that this is ...
5
votes
1answer
459 views

Is Adobe Flash Player installer redirect due to a malware?

When I go to http://get.adobe.com/flashplayer/ 'Install Now' will redirect me to their homepage without downloading the update or any explanation. What could be going on? Is some malware ...
1
vote
1answer
1k views

Spoofing OS during browsing

I am using http://www.mybrowserinfo.com/ to gather some info about me while browsing. I want to change my OS to appear that its a Windows Xp machine.(No VM solutions please:D) If you have any ...
0
votes
1answer
281 views

Does a malicious android WebView break the DoubleSubmittCookie countermeasure against CSRF?

Initial situation: A RESTful webservice defends against CSRF attacks by using the double submit cookie approach. This means that the authentication token gets submitted twice and verified at the ...
4
votes
2answers
3k views

Biba and Bell LaPadula together

Can Biba model always be combined with Bell-LaPadula model? What are the issues that arise?Would there be conflicts?How would information flow be affected?
2
votes
1answer
89 views

Is it safe to remove these groups from the Local Security Policy area?

I'm trying to edit a particular section inside the Local Security Policy snap in and I'm wondering if I really need to give all of these groups (I think they're groups) permissions. Based on this ...
1
vote
3answers
673 views

Pentesting my Own Server File Upload

I recently created my own IIS server (set on version 7.5) and I was going through checks to make sure my webdav is not vulnerable. My users need to upload files to their individual accounts and can ...
0
votes
2answers
4k views

Statistics about malware targeting different OS

Are there any reports or statistics that describe the numbers or types of malware attacks on different operating systems, such as Linux, Unix, Windows, MacOS?
2
votes
2answers
4k views

Benefits of REJECT over DROP on a single PC

Recently I learned about the difference between DROP and REJECT in a firewall. I understand that REJECT is better because it closes the connection immediately instead of waiting for timeout as DROP ...
1
vote
1answer
474 views

WordPress Comment Hacking Attempt

Recently Akismet asked me to moderate a possible spam comment on my blog. It was: <!--mfunc ...
1
vote
1answer
101 views

Set Gateway for our LAN

I am new to Networking. In our organization we try to setup gateway for security purpose so that we can block certain harmful websites. All I know is gateway is a device. What we have is the LAN ...
2
votes
4answers
20k views

Can someone tell if you are using a VPN by your IP address?

I am wondering whether a website you are accessing can tell if you are using a VPN or not based on your IP address? I have done some Google research and it appears, that this is the case. However, I ...
1
vote
1answer
731 views

Expiring Decryption Key

So, I'm just a programmer -- I don't know much about cryptography so bare with me and my lack of knowledge in this realm. But essentially, I'm wanting to cache data that could be potentially volatile ...
1
vote
1answer
125 views

Certificate Mapping in IIS

When pasting the certificate blob in the configuration editor in IIS 7.5 for one on one authentication, is this the server certificate or the client certificate?
1
vote
3answers
278 views

Are subdomains a cure for phishing?

Seeing as phishing is getting more popular and users are becoming less concerned about security, I am trying to come up with a solution for a new site of mine that can stop phishers. For instance, any ...
2
votes
2answers
310 views

Manual Checks for Signs of Infection on Windows 7

Suppose I wanted to run some manual checks to see if my Windows 7 machine has been infected. I don't usually do anything to get it infected, but I would like to check whether the below steps are ...
-1
votes
1answer
103 views

Subdomains a possible defense against phishing [duplicate]

Seeing as phishing is getting more popular and users are becoming less concerned about security, I am trying to come up with a solution for a new site of mine that can stop phishers. For instance, any ...
4
votes
3answers
660 views

comparing password hashing algorithms - PoC ideas?

OK so I just started working for a security consulting firm and we recommend SHA 256 (with salt) for password hashing because MD5 is too weak. I have read some brilliant answers (the list is too ...
0
votes
1answer
387 views

SSL (TLS v1.2) - Can i offer fallback CAs when upgrading Certificates? (Java)

I am currently developing a product that involves two network situations. At the client side, multiple computers form a P2P network (multiple locations, multiple p2p networks), and a subset of nodes ...
2
votes
1answer
266 views

Android: Are locally-stored encryption keys readable by attacker who gained root access?

i have a question: i'm trying to understand a specific point in android encryption. All the encryption keys are software based and are stored locally on the machine, so correct me if i'm wrong but ...
0
votes
1answer
194 views

TCP IN connection from another user in my home network. Is it safe?

I'm using Comodo Firewall and I noticed that sometimes I'm getting TCP IN connection from another IP address in my home network (only one router and few wireless users): TCP IN | 192.168.1.50 | ...
7
votes
2answers
2k views

Encrypting something with multiple keys such that k out of n keys are needed; what's it called?

I am trying to find information on how to encrypt something in such a way that there are n keys, and k of them are needed for decryption. However, I have been searching Google for half an hour but ...
1
vote
1answer
1k views

How can a gmail recipient open email in two different countries, at the same time?

I sent an email to person in Russia, and tracked it with Right Inbox, when the email is opened I get notified. The problem is I get 2 different IP addresses, one in Russia, and one in the US, both ...
12
votes
2answers
1k views

Ensure data doesn't linger after being deleted

I'm trying to make a service that keeps as little data on its users as possible. To that end, I want to make sure that someone using forensic tools won't gain any more information than I would by ...
1
vote
1answer
387 views

IIS 7.5 WebDav Security Issues with Students

Hello Currently I am setting up a server for college students (this includes tech-savy IT students as well) and I will be using IIS 7.5 with Webdav for the students to access their files from home. ...
0
votes
1answer
1k views

Can someone please briefly explain HIPPA compliance?

I worked in web hosting for several years, particularly security. I am familiar with PCI compliance and I would say the "short and sweet" guide to PCI for an eCommerce store is as follows: Client ...
5
votes
1answer
459 views

Does encrypting the same file twice with two different keys present a security risk?

Suppose you have a file that you wish to maintain two encrypted versions of, each version encrypted with its own (randomly generated, sufficiently long) key. The actual method of encryption is by ...
1
vote
1answer
624 views

Intrusions attempt monitoring (on MacOS X) [closed]

I know utilities such as last exist - but not sure if it's applicable for my needs - I'd like a system to notify me of any login attempts on any of my macs (home, work or remote). Attempts from a ...
0
votes
1answer
34 views

MacOS: quarantining data for import

I have collected over many, many years data from many sources, some of which could be questionable - for example an upload page on a web server at home - to the point where I don't completely trust ...
0
votes
1answer
224 views

Mac OS: keylogger vulnerability & FileVault 2

I'm configuring my mac and encrypting my disks with FileVault 2. As the boot disk is encrypted at startup I have to login via the EFI partition before the OS will boot. From my understanding, most ...
2
votes
2answers
257 views

Why would Tor not be vulnerable to this easy-sounding attack?

I'm thinking of this attack on Tor, which I'm sure won't work, as it is much too simple. Mr. Blackhat sets up lots of intermediate nodes. However, whenever TCP connections come in, they are given ...
0
votes
2answers
343 views

Would multiple exposed bcrypt hashes of the same UUID v4 with random generated salt be too insecure?

I'm looking into implementing an ownership check on JSON objects and want to avoid going back to the database to ensure ownership of said object/record (i.e., to prevent a user from updating an ...
0
votes
2answers
145 views

VM security, how to access main OS

Is there any way for me to access the main computer if the VM has been infected? Let's say that I am running Debian or ubuntu in a VM and the main computer uses Windows (or other way around just so ...
4
votes
2answers
1k views

Is HTTP Digest + MD5 still an alternative to consume my own api?

I'm reading a lot about implementing security constraints to a REST API. There are a lot of methods, some better than others for 3party applications or to consume my own API. HTTP Basic + TLS (with ...
4
votes
4answers
598 views

Key-agreement protocol in a REST API

I have a C# REST API which exposes some methods over the HTTP protocol. The API is intended to be used my my Android applocation (Java) which is currently in the makings. Since the app is in an early ...

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