29
votes
5answers
5k views

How to be completely anonymous online?

I recently saw this post on reddit: http://www.slashgeek.net/2012/06/15/how-to-be-completely-anonymous-online/ But the majority argument, both on reddit and on comments on that post seems to be that ...
1
vote
1answer
81 views

Ways to make it more difficult for data to be lifted from a website?

Assume for a moment that I run a public-facing website that hosts pictures and names of people in a "billboard" fashion (i.e. you do not have to register to view the information) and that my site ...
27
votes
3answers
13k views

How do hacking groups register domains remaining anonymous?

Let's take lulzsec as an example; they registered lulzsecurity.com. There are two problems that I don't understand how they solved: They had to pay for it. Tracking down money is generally much ...
15
votes
6answers
6k views

How does a server obtain the IP Address of a user?

How does a server obtain the IP Address of a user? Is it possible to fool the server by spoofing the IP Address?
4
votes
4answers
5k views

Detecting or preventing process memory injections on Windows (anti-hack)

Standard hacking case. Hack injects into a started game process and writes over process memory using WriteProcessMemory call. The situation is like this: we are hosting a game server clients join ...
36
votes
9answers
3k views

Why do password strength requirements exist?

Password strength is now everything, and they force you to come up with passwords with digits, special characters, upper-case letters and whatnot. Apart from being a usability nightmare (even I as a ...
12
votes
5answers
2k views

Is using “HTTPS everywhere” extension secure?

I would like to know if one should use 'HTTPS everywhere' extension? Is it secure to use it? Are there any better alternatives? HTTPS Everywhere is a Firefox and Chrome extension that encrypts ...
1
vote
4answers
275 views

How do governments carry out computer surveillance?

If https is really secure as companies tell us, how do governments manage to eavesdrop on terrorist and criminal communications? http://en.wikipedia.org/wiki/Computer_surveillance
-1
votes
1answer
237 views

Impact of attack occured in Radius, DHCP and HTTP servers on VOIP?

Assume we can crash the RADIUS server in a VOIP system. What would be the impact on the confidentiality, integrity, and availability of VOIP service. What would be the impact if the same question if ...
5
votes
4answers
2k views

Send new password by email is bad practice but what to do if user forgot his password?

According to http://plaintextoffenders.com/post/7006690494/whats-so-wrong-about-sending-a-new-password-in it's bad so what to do ? Just ask him to set a new one ?
2
votes
2answers
90 views

Does the CVSS impact score correpond to probability?

From http://nvd.nist.gov/cvsseq2.htm , I noticed that the CVSS standard attributes the following impact values ​​for confidentiality, integrity and availability: 0 for none impact , 0.275 for partial ...
0
votes
1answer
337 views

Amazon S3 Encrypted File Backup System

I am designing my backup system to Amazon S3 (probably Singapore) and I would like to have all my files strongly encrypted on the server. I use ArchLinux x64. My system will append only once an ...
1
vote
3answers
10k views

How to trace malicious hackers?

What are some of the ways law enforcement agencies can trace a hacking attempt back to the hacker? IP and MAC addresses can be spoofed easily, hackers can easily hide their tracks using compromised ...
2
votes
2answers
204 views

ASLR in Ubuntu 11.10

In many of the exploits I see nowadays, brute forcing is a common method of bypassing ASLR on 32 bit machines. However, many of these exploits crash the current process, for example, PHP. Isn't the ...
0
votes
2answers
292 views

Signing up on a paid site with a credit card

I'm building a subscription-based website that needs to accept recurring payments. The concept is much like that of Netflix, but there is also a variation between the two. When a user attempts to ...
2
votes
2answers
1k views

Skype security (linux)?

From the following article skype & from archlinux skype wiki some major skype insecurity in linux are: The skype binary is disguised against decompiling, so nobody is (still) able to reproduce ...
5
votes
3answers
514 views

Web Hosting companies asking for password in plain text

Recently, on live chat, a representative of a web hosting company (will not disclose the company name for liability issues), asked me for my password to the server in plain text in order to verify the ...
10
votes
2answers
871 views

LastPass application architecture

I'm trying to find details on the application architecture of the Lastpass browser app for Firefox and Chrome. All that seems to be out there is this security analysis: ...
1
vote
3answers
2k views

How do I use a TPM to protect my BIOS/EFI from “remote” attacks

I have a work/gaming computer. The work side is a SSD with linux and the game side is a SSD with Win7 (all security turned off, planning to get viruses and rewipe every LAN). Only one of the drives ...
4
votes
2answers
325 views

How do I remove or anonymize file names and path that are stored in compiled .NET exe output?

When an exception occurs in a .NET application, the exception output also includes the path and file name of the code file that resided on the developer's machine. This shares some information that ...
1
vote
2answers
521 views

Can a TCP connection with a VM be “escaped from” to reach the host? [duplicate]

Possible Duplicate: How secure are virtual machines really? False sense of security? If a VM (e.g. VirtualBox) on host A opens a TCP connection to a hacker Z, are there any possible ...
0
votes
2answers
102 views

Looking for information about CVE-2006-6876 vulnerability

In order to study vulnerabilities of a SIP server and the impacts of DOS attacks on the QoS of VoIP service, I have found this vulnerability which can be exploited to cause DoS on SIP server. But I ...
2
votes
2answers
839 views

Hardening a perimeter router

What are some of the steps that could be taken to harden a perimeter (internet facing) router from attacks by potentially malicious users?
3
votes
1answer
69 views

How to install client securely?

I'm writing a program in PHP that sends data from one master to many clients (all Joomla websites). When the client software is installed, it should send a message to the master identifying itself, ...
2
votes
2answers
345 views

How to properly secure OO PHP CMS?

I have OO PHP application which serves pages as well it does payment card processing via external RBS payment gateway. There is also reporting database. The problem is when somebody exploits this PHP, ...
6
votes
1answer
552 views

What governing body is responsible for the use of GSM SMS alphanumeric SenderID's?

Currently, I am writing a paper about GSM sender spoofing and how this flaw is possible with the use of different techniques and attack pattern in the GSM 2G implementation both technically and ...
5
votes
4answers
15k views

How to prevent my website from getting malware injection attacks?

My website was banned as a malware website by Google. When I checked the code, I found out that some code injected many files on my server. I cleaned everything manually, edited all files on my server ...
11
votes
3answers
8k views

What's the advantage of using PBKDF2 vs SHA256 to generate an AES encryption key from a passphrase?

I'm looking at two comprable pieces of software which need to encrypt data on disk using a passphrase. One uses PBKDF2 to generate the encryption key from a passphrase, while the other uses two rounds ...
3
votes
2answers
560 views

MX record Man In The Middle Attack?

In theory it should be possible to change a MX record of site A (aspmx.exampleA.com) to site B (aspmx.exampleB.com) and send the mail back to site A (aspmx.exampleA.com) So you can intercept all the ...
1
vote
1answer
261 views

Blocking direct access to ajax source

I made a calculator. I want to prevent that people can use the ajax.php to get the results without accessing the webpage. They have to use the API for that purpose. I suppose I can add a key ...
5
votes
3answers
210 views

How to best present 'Security Vulnerability Feedback' to devs in the IDE (like VisualStudio)

I posted today a pretty cool PoC where I was able to provide real-time 'security vulnerability feedback' to a developer as he is writing code in VisualStudio. You can see the video at Real-time ...
1
vote
2answers
157 views

Can a biometric device serve as a user based entropy source?

I am wondering if a biometric device can be used to generate some entropy or key material that would be stable across each authentication. The contrary would be for biometric devices to act like an ...
3
votes
2answers
642 views

Risks of serving untrusted content under HTTP Content-Type: text/plain?

Am I gonna run into XSS attacks by doing this, or will a file download be prompted? Are there security problems that would rise in a modern browser?
1
vote
1answer
325 views

Is Oracle gathering information from my machine when I download Virtualbox or Netbeans?

When we try to download Netbeans or Virtualbox from the Oracle/Sun site, our firewall warns us that some suite called EdgeSuite tries to obtain information from our machines. I don't know what ...
6
votes
2answers
12k views

Is NAT Loopback on my router a security problem?

Some DSL routers prevent NAT loopback. Security is sometimes cited as the reason. Is NAT loopback really a security issue? And if so, how is this exploited? NAT loopback... where a machine on the LAN ...
2
votes
3answers
1k views

Why would you do a password audit

I was thinking last night after reading an article about pen testing and security audits, why would you get a list of all the passwords for the company you are auditing and put them through a piece of ...
1
vote
3answers
3k views

Tracing an IP from a mobile broadband ISP

My honeypot caught a hack attempt from an IP that was issued by Three Mobile Broadband (UK). My immediate thought was that most probable explanation was that the user was in the UK and had his ...
6
votes
3answers
642 views

Are online hash calculators dangerous?

I was about to use an online MD5 checksum calculator when I realized that my result could be added to a database. This is significant because the string I was going to type in was my bank password. ...
7
votes
3answers
797 views

How should I choose a difficulty factor for my password hashing function?

Assuming that I'm doing password hashing properly and using bcrypt, scrypt or PBKDF2, how should I go about choosing an appropriate difficulty factor? i.e rounds for bcrypt, iterations for PBKDF2 and ...
16
votes
3answers
7k views

Can someone get my WPA2 password with honeypots?

Yesterday I went to my cousin's home and I saw that I'm not connected to his wireless (for internet access). Then I have looked up the list of wireless points. I have found his name and clicked it ...
1
vote
2answers
280 views

Securing a VPN connection

I'm new to this we want to install a new VPN connection that will be used to connect using Internet to some networks in the office the contractor want to use a" Cisco NAC Network Module or Cisco IPS ...
2
votes
4answers
422 views

Fingerprinting Hash Function

For the purpose of fingerprinting data with the least chance of collision will combining the length (as a 32 bit unsigned integer stored in addition to the hash) of the input data and/or sampling a ...
1
vote
1answer
696 views

Smart card compatible with Schlumberger (Gemalto) Cryptoflex 16K and USB reader

Another question related to previous ones A SW system constructed with Microsoft CNG can be FIPS 140-2 Level 2 Compliant? and About performance of Smard card for performing 3DES in a MD5 hash We need ...
1
vote
1answer
403 views

About performance of Smart card for performing 3DES in a MD5 hash

Another question related to previous, unanswered A SW system constructed with Microsoft CNG can be FIPS 140-2 Level 2 Compliant? Another alternative is to store the keys in a Smart card permanently ...
3
votes
4answers
3k views

Determining the point of compromise on an infected web server?

Recently a friend of mine has had his web server compromised - all PHP files were injected with malicious code, in particular one that looks to be called "GetMama". If I look this up, it seems that ...
21
votes
5answers
1k views

Hashed password storage with random salt

Ever since I've been making sites that require a user to log in with a username and password I've always kept the passwords somewhat secure by storing them in my database hashed with a salt phrase. ...
1
vote
1answer
102 views

How to detect suspicious tokens collected by a hacker

I previously asked a question here What's the use of adding a challenge in the otp algorithm? Let's suppose that a hacker has succeeded to collect tokens. Is there a way to detect suspicious ...
3
votes
1answer
765 views

Is using decrypt_derived more secure than a keyfile?

Say I have two partitions on a Linux system, a root partition (/) and a /home partition. Both of them are encrypted with LUKS. The /home partition needs only to be decrypted if / is unlocked and ...
7
votes
2answers
2k views

How can end-users detect malicious attempts at SSL spoofing when the network already has an authorized SSL proxy?

I'm working on one client's network where they have enabled HTTPS authority spoofing on their proxy. This allows them to effectively perform a man-in-the-middle attack to decipher all outgoing ...
4
votes
2answers
456 views

Are sandboxes overrated?

I've stumbled upon the following on the blog of the NoScript developer Giorgio Maone. First, he quotes the following ArsTechnica article about an XSS bug in Adobe Flash: As useful as sandboxes ...

15 30 50 per page