5
votes
1answer
976 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
724 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
890 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
254 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
182 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
501 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
46k 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
864 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
490 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
134 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
897 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, ...
1
vote
3answers
536 views

Should I use a Firefox master password or NTFS encrypt my profile?

As a follow-up to another question, is the encryption via Firefox' master password more secure than simply NTFS encrypting the profile folder? I.e. is there a convincing reason to add the ...
5
votes
3answers
4k views

Where does StartSSL generate the cerificate, server or client-side?

I.e. do really only I have the private key or do I have to trust that StartSSL (or any other provider) don't store it themselves?
1
vote
0answers
262 views

Verifying Authenticode signed executables and DLLs using OpenSSL API [closed]

I have installed openssl and now the rsa_test.c is running fine. What I want to do is: Open any exe or dll digital certificate. Extract the Thumbprint and PublicKey. The public key contains the ...
4
votes
2answers
2k views

How does Firefox securely store my SSL certificate?

I'm currently testing a free personal SSL certificate (S/MIME client / authentication) from https://www.startssl.com, which installed directly into Firefox. Now when I store backup, I have to enter a ...
5
votes
2answers
2k views

Do Client Nonces enhance the security of HTTP Digest Auth?

As far as I understand the answer at http://security.stackexchange.com/a/3024/13447, client nonces are meant to prevent attackers from amortizing the costs of brute-force hash computations by being ...
4
votes
1answer
852 views

Are SSH packets encrypted even before new keys are sent?

What format does SSH use to exchange (encrypted / plain) packets before new keys are derived? SSH Document says that after key exchange, client and server use negotiated algorithm to encrypt the ...
2
votes
1answer
222 views

is root@localhost the same as Unix root with GUID = 0 and ID = 0?

Is a Mysql root user (root@localhost) the same as the computer root account (GUID = 0, ID = 0) ? I mean, is it the root which is executing the script? How can I know if the users are the same?
2
votes
3answers
1k views

A String that if encrypted or decrypted with the same key gets an English word/statement in both cases

I am trying to find a string S that if encrypted using a Vigenère cipher with Key K, it gets an English statement/word that makes sense. Additionally, if the same string S is decrypted using Vigenère ...
2
votes
2answers
492 views

Enterprise IDS - Deployment & Uses

I am investigating deploying the Snort IDS for an enterprise environment. This environment consists of a NOC that manages several servers, mainly internal but some internet facing. There are several ...
0
votes
1answer
188 views

Please define “Carpet Bombing”

I saw a 2008 article about a certain vulnerability in WebKit which referred to "Carpet Bombing": https://www.cert.org/blogs/certcc/2008/09/carpet_bombing_and_directory_p.html (This vulnerability is ...
1
vote
1answer
925 views

cracking MD5 with salt using JTR

In a legal, learning context at school, we have to understand security in Linux in the /ect/shadow file and the anaconda-ks.cfg. These two files contains often different kind of hash and the password ...
18
votes
1answer
869 views

Doing a dictionary attack on RSA if you have the public key?

I'm trying to learn exactly how RSA works. Currently I have a very, very simplictic overview that goes like this. Having the public key allows you to encrypt things. Encrypting the same message ...
1
vote
1answer
290 views

Where are located the DPAPI BLOBS and is there any tool to decypher them?

I'm doing some testing with DPAPI for a project where I'm involved. I would like to know where the users Masterkey are located and if there is any free utility to find and decipher them. I'm pretty ...
7
votes
2answers
6k views

How safe is the ownCloud encryption in a trusted LAN?

ownCloud looks like a promising locally hosted dropbox alternative. However, it has been pointed out that the encryption is not exactly strong... (The ownCloud team does at least provide a list of ...
3
votes
1answer
548 views

Base64 encode diffences in BCrypt implemenations

I was reading the source code of several BCrypt implementations and found that two common c implementations have a difference in their base64 encoding of for the salt. What is the effect, if any, of ...
5
votes
1answer
314 views

Does DPAPI works if a user hasn't a login password?

I was wondering if the DPAPI will still work properly if a user doesn't have a a login password (like most of the home users). I can't find this information on Google or in the official documentation ...
1
vote
0answers
1k views

Why do complex viruses tend to be written in assembly? [closed]

For example Simile is extremely complex and is written in assembly. If something is going to be complicated isn't it best NOT to write it in assembly?

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