1
vote
3answers
371 views

Requirements for a smartphone anti-theft App

I recently installed Cerberus in my [personal] Android device to get some protection against theft (I'm not really interested in protecting its data, but rather in increasing the odds the device will ...
2
votes
1answer
1k views

What is the difference between `extendedKeyUsage` and an application policy?

In some Microsoft articles like http://technet.microsoft.com/en-us/library/cc731792%28v=ws.10%29.aspx, I find some confusing statements like Application policies are sometimes called extended key ...
0
votes
2answers
3k views

What knowledge is neccessary to work in computer security? [closed]

What level of knowledge does a person need to work in computer security? Are the following skills sufficient? Good knowledge in TCP/IP networking Good knowledge in firewalls/firewall techniques ...
33
votes
7answers
3k views

Is there a difference between GET and POST for web application security?

I have 2 choices in sending data between 2 web applications. I encode the data in Base64 and append to the URL and retrieve these parameters at my destination application and decode the parameters. ...
13
votes
2answers
15k views

Is it possible to use S/MIME in the web client of Gmail?

I could not find any options in the web interface of Gmail. All I could find was a Firefox plugin to use S/MIME with Gmail, but it seems to be outdated.
3
votes
1answer
690 views

Pure SRP authentication without TLS

IF using a SRP for client/server application authentication without TLS. Will it be vulnerable to man-in-middle attack, since if using SRP, the public info doesn't really useful to calculate the ...
9
votes
3answers
51k views

How do I detect malware on Mac OS X?

I have a computer running OS X, and I want to know if there's malware (e.g. a keylogger, or something that lets an attacker control my computer, or something that stops me from installing whatever I ...
8
votes
3answers
999 views

How practical/important is the Lucky Thirteen TLS attack?

I was reading this article which talks about a new attack against TLS being called Lucky Thirteen. It claims to allow repeatable MitM attacks against HTTPS connections. It's described as being fairly ...
9
votes
4answers
10k views

Why is it even possible to forge sender header in e-mail? [duplicate]

With so many popular e-mail providers forcing users to log on using their SMTP servers, why is it still possible to forge "From: " header in e-mails? What prevents users from simply discarding the ...
7
votes
1answer
631 views

Safest way to keep an offline bitcoin wallet

Keeping a large amount of bitcoins in an online computer is dangerous. The bitcoin wallet is merely a file, and once the file has been copied the bitcoins can be transferred to another account. ...
3
votes
4answers
198 views

Generate DB Password from license key - a good idea?

There's this web app which has a SQLServer database, and the connection string it uses to access the database is not stored in any configuration file. Rather, the designers decided it would be a good ...
-8
votes
2answers
755 views

PHP injection on 777 file [closed]

Some one has modified a PHP file, which had permissions set to 777, on my VPS server. How can someone do that without administrative access to the server? What information I can give you? I know ...
1
vote
1answer
107 views

How can be detected connection throttling in response to portscan detection?

Imagine that I have to pentest a server that implements portscan detection based on the number of packets received to different ports in a time interval. I don't know that the server is implementing ...
2
votes
4answers
902 views

Tracking a user who has posted abusive messages

A visitor to our site has posted abusive messages and I wish to block them but I'm not sure there's much I can do besides blocking their IP address (and even that won't help much). After analysing ...
34
votes
4answers
20k views

Demystifying Web Authentication (Stateless Session Cookies)

I'm currently researching user authentication protocols for a website I'm developing. I would like to create an authentication cookie so users can stay logged in between pages. Here is my first ...
-1
votes
1answer
311 views

How to prevent code injection like automatically adding extra character? [closed]

Code: $result = "Hello World"; $jsonEncodeValue = $result; echo $jsonEncodedValue; Assumed Output: "Hello World" Real Output: \n"Hello World" This \n Line Feed added automatically. For this ...
4
votes
3answers
4k views

Email hacking myth

I never believed that some one can actually hack an email that easy. If someone hacks an email it means he actually hacked the server and he will gain access to many emails not to mine only. Anyway ...
0
votes
2answers
92 views

Situations that a firewall should use rule for all packets

When should a "match all packets" rule be used (instead of chain policy)? I think that this should be used in real time applications like audio streaming or video broadcasting. Are there other ...
1
vote
2answers
1k views

Secure against HTTP FLOOD ATTACK

What is the best way to defend your web site against HTTP FLOOD POST/GET ATTACK ?
4
votes
5answers
4k views

Strange android app … possibly a mass malware?

I started receiving on my android Samsung Galaxy note strange notifications in Mandarin (the language of the people of china). Once I click on the notification it opens my browser with a blank page ...
1
vote
1answer
152 views

Error using ncrack

I am trying to run a ncrack command of the following format: ncrack -P filePath1 filePath2 --user user1, user2, user3 ipAddress:port and I get the following error; Does anybody know why I'm ...
0
votes
1answer
123 views

Auto encrypt chunks of content for backup, best practice?

I'm just curious and it's more like a mind game, I'm not into cryptography. How would one encrypt data that's constantly generated? Put the data automaticly into chunks encrypt the chunk and send it ...
-1
votes
1answer
240 views

A simple but dangerous vulnerability in windows7?

I discovered that if you change the extension of any file to .lnk, that is make it like a shortcut file, then you can't change the extension again, even if you have set 'show the file extension names' ...
-3
votes
2answers
894 views

Good Practice: Storing Passwords in general

I've got a totally theoretical question to you on today - what is the "best" practice for storing passwords? [Best in terms of security and performance] Usually, especially PHP-Developers tend to ...
5
votes
3answers
11k views

How do you detect load balancing?

Scenario You need to PenTest XYZ.com. You expect, because it is a high traffic site, that multiple servers are being used with a load balancer. Question Aside from pulling the MACs (which are ...
4
votes
2answers
5k views

Why doesn't Microsoft implement salt on users passwords in Windows?

Pretty straightforward - So we use rainbow tables to get passwords of users out of hashes. So why won't Microsoft implement salt on the passwords in Windows to be hash(password+salt)? Won't this ...
3
votes
6answers
424 views

Protecting an admin area from the public

We are about a month away from launching a pretty important site, which comes with an admin console to help us manage the site. Now I'm not very interested at just leaving the admin out in the open ...
1
vote
1answer
304 views

Packet-filtering firewall evasion (Scanning)

Context I'm very familiar with different applications of scanning tools (. . . and you can use -mtu to specify the size of the fragments in nmap . . .) but every piece of information I read about ...
2
votes
3answers
261 views

Authentication system against the user

I try to search articles on the internet in this category, but no result. In generally we use authentication of the user against the system. So, we want to authenticate the user before he\she use our ...
3
votes
2answers
460 views

How content-type:image can lead to infected JAR file?

Symantec published a news about a malvertising campaign targeting IE users with Java exploits (already known vulnerabilities). At some point they explain that the users are redirected on malicious ...
1
vote
1answer
500 views

Os command injection privileges

I have a question about privileges when performing an Operating system command injection. If an attacker succeeds in getting a reverse shell on a remote server through netcat (netcat -v -e ...
4
votes
3answers
2k views

Is there is a way to lock my USB port over the device physically?

Is there is a way to lock my USB port over the device physically ? For example I am connecting the USB mouse and keyboard on an public computer but I do not want anyone to remove them physically. I ...
1
vote
0answers
41 views

Database hash for password field [duplicate]

I'm using a mysql database and am looking for a cryptographic hash method for a password with salt added to it. What would be the best hash method for this problem?
1
vote
2answers
170 views

Need a time consuming symmetric encryption

I have a database with millions of entries, each entry encrypted with a (different) password. Normally, only one entry is needed at a time. If somebody steals the database, I want to make it hard for ...
2
votes
1answer
800 views

Proxy server and IP address blockade

i am in china. so i use web freer to use blocked sites like face book and you tube. we use broadband connection provided by our university. some times the server goes too down and we can not use ...
3
votes
2answers
446 views

Securing Time Sensitive Data

I have a number of time sensitive, embargoed pieces of information that I need to distribute over the Internet and have received at a precise time. I'm currently dealing with the problem by uploading ...
18
votes
2answers
25k views

Brute Forcing Password to a Truecrypt-encrypted file with Partial Knowledge

A while back, I encrypted a few files with Truecrypt, and stored the password in my head. Now I need to access it again, the password isn't working. I'm sure most of it is right, but I'm off by one or ...
2
votes
1answer
1k views

sha-512 vs sha-3? [duplicate]

Does the new SHA-3 Keccak hashing algorithm offer any benefits from SHA-512? "Even worse, none of the SHA-3 candidates is significantly better. When SHA-3 is announced, I'm going to recommend that, ...
2
votes
2answers
4k views

What is more risky? Database Server in DMZ or Trusted Network?

Hoping this is not a dupe of any of the related database / DMZ questions, but I don't think any of them answered my question sufficiently. Assume the following A web server is being used for ...
3
votes
1answer
685 views

How to debug/reverse engineer java applets?

I need to analyze a java application (a .jar file) for a war game. I know java can be decompiled, but the coder apparently did a lot of obfuscation to prevent the reverse engineers from understanding ...
2
votes
4answers
1k views

My website has been hacked, what do i do next? [closed]

So. I couldn't see any other question like this on Sec.Se so i thought i'd ask. My public website www.foo.com has been hacked. The front page is sending it to be redirected to seoblog.fooblog.com in ...
1
vote
1answer
501 views

What is the fight-back mechanism in OSPF?

I want to know more about the fight-back security mechanism in OSPF routing protocol. When is the mechanism activated and how does it work? I found the source description of OSPF fight-back, but the ...
3
votes
2answers
5k views

Protecting against SSL Strip [duplicate]

I've read you can attack connections using tools like sslstrip, if you are on the same network. So what ensures that our SSL connections remain safe? Does it depend on the cert strength? Do you ...
5
votes
3answers
408 views

What is a reasonable expiry for user authentication certificates?

This question is about a nearly decentralized P2P system with a centralized certificate authority where users can authenticate and receive a certificate on their public key and then can authenticate ...
6
votes
1answer
792 views

For a desktop application, why use an SSL certificate from a trusted authority?

When a web browser connects to a server and downloads an SSL certificate, a third-party trusted authority ensures that the client is talking to the host that it's looking for. If the host uses a ...
18
votes
7answers
1k views

How to deal with a person who gets easily fooled by internet and mail scams?

alternative title: How to deal with a person who has gotten paranoid and doesn't want to go online anymore? A person, who has over the years been scammed many times, by bad spam/fraud emails, and ...
11
votes
1answer
6k views

Android Runtime Code Injection

I'm doing research for a static analysis tool to help detect malware in Android applications. I'm wondering if it is possible to perform code injection on Android without using a class loader. I ...
5
votes
5answers
244 views

How to avoid to lose data encrypted because it was encrypted by no longer supported software?

How can I avoid losing data that is encrypted using methods that may become obsolete? I have valuable family records I wish to secure, so I plan to encrypt them before putting them in long-term ...
10
votes
6answers
818 views

Does not having https moot this entire site?

On a bank website the other day, I noticed that they were giving out a phone number on a page that wasn't over https. This seemed really wrong to me, since it would allow somebody to change the phone ...
2
votes
1answer
2k views

Using John the Ripper to crack SHA hash w/ partial knowledge

Group, I have a SHA1 hash that I would like to brute-force. I have knowledge of several characters before and after the password (ie, if the hash is derived from "xxxpasswordyyy", I know both xxx and ...

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