103
votes
9answers
12k views

How can PayPal spoof emails so easily to say it comes from someone else?

When I receive a payment in PayPal, it sends me an email about it (pictured below). The problem is that the email is shown to be coming from the money sender's email address and not from PayPal ...
3
votes
1answer
327 views

What lawful interception standards are used outside Europe?

In Europe European Telecommunications Standards Institute (ETSI) define the standard requirements to handle a lawful interception. It's define all from the terminology and definition to the ...
8
votes
4answers
1k views

Automated encryption detection

Is there any program that, given a cipher text, it would tell me what the encryption algorithm is? What if I have the plain text? Is there something that can be done in that case?
16
votes
4answers
2k views

sniffed packets , is there a way to put together the file?

I would like to know, in case an attacker manged to capture some packets from my network traffic, can he build from them a file or any easy to understand thing? I know that the TCP/IP protocol is ...
4
votes
2answers
7k views

Listing of DNS vulnerabilities

I am currently studying how to setup DNS servers and all aspects of the DNS system. I would also like to study the security aspect. I want to use current DNS server attack on my test servers. Is there ...
5
votes
2answers
3k views

What asymmetric encryption algorithms are in common use beside RSA?

I am looking for an asymmetric encryption algorithm other than RSA?
4
votes
1answer
956 views

Is a public known password protected Wifi more secure than one without a password?

When connecting to a public Wifi from a café for example, some don't use a password and some do. If they do use a password it is often publicly known to everybody around. Does having a password on ...
9
votes
3answers
7k views

Proxy vs. Firewall

I understand that very simply put a proxy is a sort of 'man in the middle' allowing/denying access to certain services/resources. Strictly in terms of security (I mean here privacy, parental control ...
8
votes
1answer
11k views

Are open ports dangerous?

I have forwarded port 80 to WAMPServer and 25565 to the MineCraft-server running Bukkit. (http://www.bukkit.org/) Am I vulnerable to attacks. Can hackers attack me if WAMP-server is running or if it ...
1
vote
3answers
478 views

Install my own proxy

My school network has blocked a lot of webpages, including TeamViewer, which I need. The IT department told me to find a proxy, because it was their ISP who had blocked the sites. To connect to the ...
10
votes
2answers
5k views

Is it safe to store the password hash in a cookie and use it for “remember-me” login?

I want to store an encrypted string of the password hash in a cookie and use the hash to lookup the user and log them in (if they want to be remembered). Is this safe? The password is one-way hashed ...
3
votes
3answers
214 views

Best approach for making an app that connects to sensitive information

I'm gonna be writing an app that connects to a server with sensitive information and one of the main requirements is that only my app will be able to make the connection. There is no user supplied ...
11
votes
3answers
2k views

Which Linux kernel vulnerabilities allow installing a kernel-level rootkit?

My question is related to vulnerabilities that allow installing a Linux kernel-level rootkit (for example, to modify the execution flow inside the kernel; for return-oriented attacks; or to modify ...
6
votes
3answers
190 views

How could one detect if Apple/Google/etc. has modified a third party application distributed through their App Stores?

Are there any realistic methods for verifying that Apple or whoever has not tampered with third party application distributed through their App Store? You might for example have an open source ...
8
votes
1answer
257 views

Why are website certificates secure?

I understand how HTTPS connections work, and I also understand they they require a certificate to know that the secure connection you have is with the right server (and not someone pretending to be ...
3
votes
1answer
200 views

What are best practices considering the use of Apple data protection?

Since iOS 4, Apple data protection supports hardware based encryption of confidential information on the device. I looked around for best practices considering the use of Apple data protection, but ...
7
votes
3answers
2k views

Where can I find exploit code?

I am doing VA/PT on a sample web application. I run the nessus scanner and I found some high severity problems. It is related to HP System Management Homepage. The CVE numbers are: 2010-1917, ...
12
votes
4answers
6k views

Does symmetric encryption provide data integrity?

Let's say I have one server that encrypts a file with a symmetric key, e.g. AES-CBC, and sends it to clients that decrypt it. Does that provide data integrity when decrypted? Or is it possible for ...
3
votes
4answers
4k views

Should I enable domain authentication in my DMZ

Traditionally at my place of work we have an internal subnet that is completely protected behind our firewall. No ports are allowed to be opened to direct connections from the public network. We also ...
4
votes
1answer
246 views

Two generals' agreement

I am trying to figure an agreement protocol on an unreliable channel. Basically two parties (A and B) have to agree to do something, so it's the two generals' problem. Since there is no bullet-proof ...
5
votes
3answers
3k views

What are the odds of brute-forcing an archive with 256-bit encryption?

I have a file (a stand-alone archive). I lost the password to it, but it has been encrypted using 256-bit encryption. The password is some 20-odd characters long (including non-alphanumeric ...
3
votes
1answer
370 views

Security for a low latency online multiplayer game

I am designing an online multiplayer game and I am looking for a good tradeoff of secure communications with minimal CPU and bandwidth utilization. My ideal solution would only use UDP packets since ...
14
votes
4answers
4k views

What risk does Carrier IQ pose, exactly?

There has been a lot of discussion about Carrier IQ, monitoring software that is pre-installed on many Android phones. Many allegations have been thrown out. My questions: What exactly does Carrier ...
8
votes
6answers
2k views

Filter user input before the database or upon display?

Given a web application where user data must be properly escaped to avoid XSS, is it better to try to remove the "bad stuff" before it enters the database, or is it best to allow it in the database ...
6
votes
3answers
1k views

DB Passwords: More Secure in a PHP App's .ini config files or apache2 environment variables?

I manage a php app whose key variables (such as database server addresses, DB user names and passwords, etc) change depending on their environment (Dev, QA, Production, etc.). In order to simplify ...
20
votes
6answers
3k views

What is the difference between $200 and $1,000+ Firewalls?

Instead of asking about the pros and cons of specific hardware, I thought I would ask a broader question: What are the differences between really expensive and inexpensive firewalls? What extra ...
4
votes
6answers
1k views

When storing private identifying information in a web application, what is “industry standard” best practices? [closed]

I am building a hosted (SaaS) web application that stores PII like name, email address, and employer of the user. As of right now, I don't intend to ever store credit card numbers or bank account ...
6
votes
1answer
696 views

Yahoo! Messenger injection attack

Just five minutes ago I had an injection attack through Yahoo! Messenger. The only visible effect was the change of my status message. I also got a dialog message saying that a script cannot continue ...
3
votes
2answers
291 views

How does one make password easily forgettable?

Is there any phycological research that appears relevant to making passwords easily forgettable under adverse circumstances? Circumstances might include when under duress, after some duration of ...
5
votes
4answers
2k views

How to roll my own security mechanism - avoid SSL

i'm looking at implementing my own security mechanism rather than using ssl due to ssl being 'hopelessly broken' http://www.theregister.co.uk/2011/04/11/state_of_ssl_analysis/ and also because it is ...
3
votes
3answers
180 views

Resources/tools for controlling access to corporate email on smartphones

If one of our employees has access to corporate email on a smartphone I want to make sure that if they lose the phone then whoever finds it can't get at any corporate email on that phone. For iOS ...
8
votes
4answers
355 views

How to test a physical machine?

In two weeks time, I will have to test a couple of computers that a client would like to provide to its employees. The main concern is making sure that the employees won't be able to use those ...
8
votes
4answers
5k views

Is .htaccess protection secure enough?

For the moment we protect a directory on our site with .htaccess and .htpasswd. But I was wondering how secure this is? Are there things I should watch for or can do make it more secure? I don't know ...
5
votes
2answers
1k views

Is that possible? A router with arpspoof from factory

Just bought a 3G router from China and then checked the log: [1970-01-01 00:00:00] The system will be restored the factory value. [1970-01-01 00:00:00] The system current version: 1.0.5.1. ...
2
votes
4answers
2k views

Web Security Certifications

I'm looking for a certification for Web Application Security and Web Pen Testing. Via Google I found the following two: Certified Web Application Tester GIAC Web Application Penetration Tester How ...
9
votes
5answers
2k views

Mobile Carrier Javascript Injection

So it appears that T-Mobile in the UK are injecting a javascript file into the head of files that are transfered over their mobile data network. The file in question is 1.2.3.8/bmi-int-js/bmi.js ...
7
votes
2answers
2k views

ssh public/private key pair

I am having problems understanding how ssh really works. I know it uses a public key cryptography to encrypt messages. However, I can ssh to a server without first generating a public/private key pair ...
1
vote
2answers
156 views

Is there a cyber equivalent to the JTLS?

Is there a cyber warfare equivalent to the JTLS? Is a "cyber range" the correct term for something like that?
3
votes
2answers
264 views

security and the well constructed Qt plugin

"All you'd have to do is build a plugin and you could completely pwn the software." I'm building an application using plugins. I think all you have to do is build a plugin and copy it into the ...
-1
votes
1answer
758 views

IIS won't forward the logged on user credential to webservice request?

Ive enabled Windows authentication in my IIS. for the sample lets assume my Active directory username is \domain\John My task flow is like that : Iis won't forward the loged on user credential ...
5
votes
1answer
1k views

Oracle ExaData Security best practice

Does anybody have experience with Oracle ExaData Security? Client wants to move all of his Oracle DB to central Oracle ExaData server. So on same machine will be hosted DBs of different vendors and ...
13
votes
4answers
2k views

How is a worm different from a virus?

In spite of various online articles, I'm a bit unclear on the distinction between a "worm" and a "virus". Two related questions-- Is there a useful and clear distinction here or no? If so, what is ...
6
votes
3answers
505 views

Firewall says that a program that I'm developing is trying to connect to the Internet

I'm seriously confused about this, since the program is entirely developed by myself and has no means/functionality to connect to any network/the internet whatsoever. I'm a software engineer but not ...
21
votes
5answers
1k views

Are address bars unphishable?

I've taken, out of curiosity, the Phishing Quiz by OpenDNS that tries to teach the general public about detecting phishing: Ever wonder how good you are at telling the difference between a ...
1
vote
3answers
752 views

Three Message Authentication Protocol

I have a protocol where "A" initiates communication with "B". "B" then sends a challenge to check if "A" is really "A". "B" does not remember sending the challenge so "A" has to respond by sending the ...
4
votes
2answers
2k views

What are the security implications of SSH tunneling?

We have an internal lan (not connected to internet, all internal ip addresses, behind a firewall, no routing to outside), we also have a machine that sits on the edge of our lan (two nics, one on the ...
9
votes
2answers
23k views

nmap scan shows ports are filtered but nessus scan shows no result

I'm performing an port scanning on a range of IPs on our remote site. I tried running nmap scan on that IP range and some of the IP result are shown as filtered When I perform a nessus scan on the ...
8
votes
2answers
2k views

Antivirus for scanning anonymous file uploads

Since I have no experience with AV solutions on Unix-like environments, I would need help with suggestions on something that can be suitable for scanning files that are uploaded by anonymous users ...
13
votes
2answers
14k views

Sudo password when authenticating via passwordless SSH

I've got a few boxes all networked together on Amazon EC2, each of which are in automated communication with each other via SSH (rsync, etc). As such, I've created SSH keys on each of these machines ...
9
votes
3answers
1k views

localStorage for apps over https. What expectations are there?

I run an online gradebook. To keep student data private, I transfer all data over https. Now, I'd like to use localStorage to avoid redundant calculations and server requests. However, according to ...

15 30 50 per page