4
votes
2answers
609 views

Why are simple packet filter firewalls insufficient for the protection of web applications?

I was wondering why exactly are simple packet filter firewalls insufficient for the protection of web applications?
1
vote
1answer
188 views

Is truecrypt a good choice to work with file that are generated and manipulated via browser

i'd like to know if Truecrypt is a reliable software for filesystem encryption, at the level of pgp as security level, and if it suitable to work with files that are generate via web browser, so ...
15
votes
4answers
1k views

My credit union is reducing its maximum password length to 10 characters

I just received an email from my credit union saying they are redesigning their online banking service and that I will need to change my password by October 22 to conform to the new limit of 10 ...
2
votes
2answers
450 views

Safety of opening .txt files via URL

If I'm given a URL that points to a .txt file, is it always safe to open it? Can it possibly contain virus or malicious content?
6
votes
3answers
313 views

How much added security do I really get with a longer key size?

Imagine I have a cipher which supports keys of 128, 192 or 256 bits. Suppose that there are no vulnerabilities in the cipher regardless of key length. I'm going to use it to encrypt something, and ...
2
votes
1answer
321 views

Keyloggers and Performance Benchmarks

I don't know very much about keyloggers; but I thought I'd be able to detect the presence of one by writing a program to simulate keystrokes (in Windows) and recording the throughput, then repeating ...
2
votes
2answers
449 views

How attacker can access victim's account without knowing its credentials?

I want to login facebook from a wifi connection and check sign-in page is over https but later when i don't pay attention to address bar (for example when playing games and click on links like a crazy ...
-1
votes
1answer
94 views

Sharing of Wireless Security and Encryption Settings

Frequently I try to connect to various wireless networks and spend more time trying to determine the correct settings (WPA or WPA2? Personal or Enterprise? and so on) than anything else. Why isn't ...
2
votes
1answer
956 views

Password authentication using DynamoDB

I'm working on a Mac app. I have users stored using DynamoDB. Authentication is needed to enforce access control on system-internal operations, such as uploading files to Amazon S3. Of course, I ...
0
votes
2answers
1k views

Running Apache as system service on Windows 2003 R2 64-bit

Trying to make my point, that running Apache with PHP5 module as Windows service is not secure. All I got to prove it - FTP access to some internal website. So what I did - I uploaded file test.php ...
4
votes
3answers
2k views

Is a forced rewrite from http to https secure? What does SSLRequireSSL add?

I've read contradicting advice about forcing https connections in the following way: RewriteEngine On RewriteCond %{HTTPS} off RewriteRule (.*) https://%{HTTP_HOST}%{REQUEST_URI} To me it seems ...
3
votes
3answers
1k views

What are methods for preventing browser hooking / drive-by downloads?

This question may be a bit too broad and open ended, however I'm hoping to get some good advice on this. With the advent of BeEF and more and more of the computers in networks being infected just by ...
14
votes
6answers
2k views

Why not RSA-encrypt the entire document?

I have recently learned of a way for person B to verify that a document sent from person A is indeed from person A. Person A gives Person B his public RSA key. This must be done reliably. Person A ...
10
votes
2answers
716 views

How insecure is PowerShell Web Access?

Windows Server 2012 comes with a new feature that allows you to administrate the server via a PowerShell command line in any modern browser including Smartphones. This sounds cool and scary at the ...
15
votes
3answers
10k views

How to encrypt database connection credentials on a web server?

OWASP advise against storing DB credentials in plain text: https://www.owasp.org/index.php/Password_in_Configuration_File However, they don't provide suggestions of how to encrypt the DB access ...
0
votes
1answer
127 views

How to initiate the learning process of modern day IT Security concepts mainly cryptography? [closed]

I am a programmer with about 7 years of experience mainly in Java . I am interested in the subject of cryptography very much . I love algorithms and datastructures . When I first started learning ...
12
votes
5answers
5k views

What is a DoS Attack and how does it differ from a DDoS attack?

Can some one explain to me the concept of Dos Attacks for web applications ? Also what is the distinction between Dos and Distributed Dos ( ie DDos) attacks ? Wikipedia says : In computing, a ...
5
votes
1answer
972 views

When and Why does Chrome display malware detection warning?

Google Chrome contains malware detection feature. When user visits some site, browser may display warning that site contains malware. What does it mean that site contains malware? Does it mean that ...
1
vote
3answers
2k views

How to exploit DRUPAL-SA-CORE-2012-003

I have read the security notices and understand that it "would allow an attacker to reinstall an existing Drupal site with an external database server and then execute custom PHP code". According to ...
2
votes
2answers
1k views

Revoked certificate validation using past times

I'm working on XAdES implementation for Java, as such I require cryptographic implementation to be able to verify certificates in the past. Unfortunately I have problems verifying revoked ...
5
votes
3answers
3k views

Can someone detect the URL an android app uses?

I have an android app that makes HTTPS connection to specific URL. Is there a way to keep this URL secret? I know that the IP address and the port number of that connection can be detected, but what ...
4
votes
2answers
721 views

Block cipher Implementation in C++

I'm writing an implementation of a block cipher in C++. I would like to study differential cryptanalysis of the cipher, so I'm generating random plaintexts and keys and then encrypt them. Which is ...
8
votes
6answers
3k views

Whats the probability of a personal computer being hacked?

For a normal computer user following these practices: Have an up to date anti-virus with a firewall installed (Norton). Do not install cracked software. Do not open suspicious links or download ...
10
votes
2answers
6k views

Security Concerns with TCP Forwarding

Until now I've been setting TCP Forwarding in ssh always blindly to no but searching on the net, I have trouble finding out what the actual security threat is, when allowing it. The one thing I did ...
5
votes
3answers
1k views

Bank forces me to use six character alphanumeric password

My bank (it's Westpac, one of the big ones in Australia) has some strange restrictions on passwords. They're maximum 6 characters in length and it must contain only characters A-Z and digits 0-9, and ...
9
votes
2answers
889 views

My bank makes me enter my password using the mouse. What's up with that?

Internet banking login process for Westpac requires user to enter the password using the mouse. It's annoying, what's up with that? Is it just to try and stop keyloggers on public computers or is ...
5
votes
5answers
235 views

Is there any security value of creatively naming folders containing sensitive files?

A friend of mine asked me if he could sign his tax returns without printing them out. While helping him, he insisted on naming the folder containing images of his signature and initials a completely ...
6
votes
1answer
1k views

Is it safe to store twitter access tokens client side?

After the Twitter oauth process, once I finally get my access_token_key and access_token_secret is it safe to store these in a javascript variable client side? As far as I can work out nothing can be ...
2
votes
1answer
252 views

Password checking in the context of symmetric encryption

It is my understanding that block ciphers like AES don't have any built-in mechanisms to verify data integrity upon decryption, although some modes of operation might provide that. I played around ...
17
votes
7answers
2k views

My company policy states I must put all passwords in a password safe shared with management. Is this secure?

As the title says, my company has a policy that all passwords to e.g. our workstations and server logins must be stored in an online safe. I won't say which one but there are some out there you can ...
9
votes
1answer
1k views

Reversible password storage obfuscation method for third-party login credentials

I have an internal business application, that as part of its functionality connects to a third-party app using login credentials specific to the user of my own app. These passwords are stored in a ...
2
votes
1answer
181 views

Security of re-encryption with a list of pre-computed password based keys

I have a problem where an encrypted file stored on a server needs to be decrypted through a precomputed list of passwords that are used one time only - OTP applied to encryption basically. The file is ...
1
vote
0answers
164 views

What becomes of SIEM when a large database like teradata gets involved? [closed]

My topic sentence says it all. I want to know the effect on performance, storage and analysis capabilities when teradata database is added. I'm talking about 70TB of storage with internal ...
3
votes
3answers
1k views

Can malware on my computer infect my phone?

Suppose my computer is compromised or has malware. Can the malware spread to my phone? If so, how? Has any malware been observed in the wild to do this? Relevance: Some banks use two-factor ...
4
votes
2answers
195 views

If I storing my own cards in a database. Does this fall under PCI compliance framework?

We want to store some cardholders data in our database. The card we want to store are all connected to our own company account. Does this fall under the PCI framework? For example do I have to comply ...
2
votes
2answers
1k views

Why does Amazon ask for the CVC/CVV if it bills without it?

I have a follow-up question relating to this question: How does Amazon bill me wihout the CVC / CVV / CVV2? If amazon.com can bill without the CVV why does it ask for it the first time information ...
5
votes
2answers
1k views

How can I use nmap to distinguish between a normal linux machine and an android device?

According to this link: here, nmap 5.2 onwards is now supposed to detect android smartphones. I am using nmap 6.01 but it only identifies android devices as running a linux kernel.
0
votes
1answer
497 views

is it OK to grant permission for IUSR_ to cmd.exe?

One of my developers asked me to grant permission to IUSR_ user (the IIS user) to CMD.exe (console) now I'm wondering is it safe to do it? He is complaing, that his libraries had to use console for ...
5
votes
1answer
4k views

Password length limits in history of operating systems and popular web sites

I heard that many years ago for example passwords on linux systems were limited to 8 characters. Or rather, you could type in more than 8 characters, but only the first 8 characters mattered. ...
26
votes
12answers
5k views

How secure are passwords made of whole english sentences

I often read as an advice to build strong passwords, just to think about a sentence and then take the initial letters. For example take a nonsense sentence like "I watch Grey's Anatomy at 9.40" gives ...
0
votes
0answers
41 views

Creating a VLAN seperating home network and server - security issues? [duplicate]

Possible Duplicate: Why do people tell me not to use VLANs for security? After my host of my vServer crashed his infrastructure (takes up to two weeks to get it back online!!!), I decided ...
56
votes
2answers
45k views

Is it a bad idea for a firewall to block ICMP?

This question was inspired by this answer which states in part: The generic firewall manifest file finishes off by dropping everything I didn't otherwise allow (besides ICMP. Don't turn off ICMP). ...
0
votes
1answer
862 views

QR code as certificate of authenticity

I need details about QR code that provides information about whether its product is original or not. The situation is a stamp that tells that this product has been certified as safe to be use by this ...
5
votes
2answers
9k views

Privacy implications of IDFA/IDFV? (iPhone/iOS)

Apparently, iOS 6 introduced IDFA, "identifier for advertisers", which identifies your device so that advertisers can track you and send you ads. It appears they also introduced IDFV, "identifier for ...
9
votes
1answer
488 views

Can all the (other) recepients of a PGP encrypted message be identified?

Does an encrypted message contain any information about whom it is encrypted to, or at least to how many recipients? And if so, is it at least only obtainable for other recipients or for just anybody? ...
2
votes
3answers
2k views

Using an IPS as an alternative to mod_security

I am considering deploying mod_security as an addition to our web infrastructure. I am worried about the increased load however as these servers get a lot of hits. I am considering using IPS's such ...
3
votes
3answers
133 views

Can the root of a system access to unencrypted data when using a double tunnel?

I connect to a DMZ gateway system (B) which is not secured. From this machine (B) I can connect to the final destination (C). A-->B-->C I created a ssh tunnel from A to B and forwarding the port 22 ...
0
votes
2answers
257 views

Analyzing SSL encryption

I have to analyze SSL encryption in my test network and want to prove the transported data is encrypted. What methods can I use to prove encryption is in place?
5
votes
2answers
893 views

Is it good practice to manually lock down ports on each host

We have a strong perimeter firewall. Would it make sense to still use IPTables on each host to hard block any and all ports except for the ones that are needed (DNS, 80 for the web server, nagios ...
0
votes
1answer
180 views

Proxy Non-HTTPS logins through EC2

I've been thinking a lot about password security these days, and have been becoming more and more hesitant to use services that have login forms that are not on HTTPS. As I was researching security, ...

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