2
votes
2answers
155 views

Why is it so difficult to protect an application against buffer overflows?

For example, buffer overflow vulnerabilities in Flash are often discovered. Shouldn't a proper verification of all function parameters in Flash source code be enough to protect against buffer ...
2
votes
1answer
165 views

MITM SSL connection

I read this article today about an SSL MITM. I am trying to understand this attack. This may be a naive question. My understanding is that the WebView sends a request to domain name, the server ...
2
votes
3answers
221 views

Security “Threat” with Picture of Yourself?

This is one issue which I have came by in the world of Security, which I can not seamlessly wrap my head around. How is it a threat to one's security by showing them a picture of themselves to people ...
0
votes
2answers
214 views

Can session data be manipulated without access to source code

When implementing a web-based application, how secure are any session variables against manual manipulation beyond the scope of my code? i.e. when a user is authenticated, if I were to initialise a ...
-1
votes
1answer
119 views

Where are MAC used?

I can think of where people use hashes and signatures. But where are MAC used in real life? Are there any protocol in cryptography that uses MAC? Or examples where MACs are relevant?
1
vote
3answers
138 views

Is it safe to share my hostname

I am using GNU/Linux. Sometimes, I copy/paste code from the terminal (like user@hostname ..) to put it in a forum thread or a blog ..etc And I was always wondering that it is better to hide it . Is ...
14
votes
2answers
6k views

Is Apple's push notification service implementation vulnerable to a MitM attack

Recently(more info) I've spotted a strange message in the logs on my quite recent, fresh installation of OS X Mavericks 10.9.2 Apr 27 15:26:47 Ivans-MacBook-Pro.local apsd[194]: Unrecognized leaf ...
1
vote
0answers
44 views

Is the root CA certificate required in the .crt file? [duplicate]

I am setting up SSL on Nginx with a free StartSSL certificate. Based on the instructions given on this StartSSL page I created a unified certificate containing the CA's root certificate, Intermediate ...
-3
votes
3answers
340 views

Hashing credentials. Is hash(email+password) secure enough?

I am working on a client server application where to identify each user I was thinking of storing a single database entry: hash(email + password) In my opinion, this is enough to stop some known ...
-2
votes
4answers
136 views

Trying to secure a code

I am trying to make hard to a code to be modified. Security is my concern. Ok, I know what you guys will say about piracy, bla bla bla. Lets refrain from that discussion. I am trying to collect ...
4
votes
3answers
1k views

Is web app safe in not public folder?

I'am wondering if it's really safe to use this structure of my web application. WEBAPP Application Controllers Models Views ... Framework ... ...
0
votes
1answer
55 views

Applications of ODEs to Cybersecurity

My university's cybersecurity program allows one to take a course in ordinary differential equations as an elective. The course would be interesting to take, although I don't know how I'd apply it to ...
3
votes
1answer
256 views

How to fix this broken crypto protocol?

I am considering a protocol where you upload a one time pad to a server, using public key encryption and then the result (using the pad) is sent back in plaintext: Alice uses Bobs RSA public key to ...
-1
votes
1answer
99 views

AES Key Generation?

I am generating a random number and using the random am generating the AES key of 256 bit. If I use the same random number again, whether it will generate the same AES Key again ? If not means why ? ...
0
votes
1answer
516 views

Fomat String vulnerability used to display data outside the function stack frame?

if we run the following code using the input "hi", the output will simply be "hi" main(int argc, char **argv) { char *secret = "This is a secret 1\n"; char *secret2 = "This is ...
1
vote
1answer
1k views

What is a AUTH-KEY in the security of the computers?

I'm studying security in computers and in particular the URL Spoofing. I understand that a form of URL spoofing is phishing. Then I read that a countermeasure against phishing is the authentication ...
1
vote
0answers
291 views

RSA 4096 key size difference - “sig” and “sig 3”

Whenever I generate a new 4096 RSA key in my GPG program and export the public key to a text file, I get a text file containing a total of around 52 lines (it varies, one of them is 53 lines). ...
1
vote
1answer
511 views

SSL Handshake random number?

I realized all of the phase of the handshake but I do not understand how it does that from the two randomly generated numbers are unable to generate a session key that the client and the server uses ...
7
votes
1answer
5k views

Determine if private key belongs to certificate?

Given a certificate¹ and a private key file², how can I determine if the public key on the certificate matches the private key? My initial thought was to simply encrypt some text with the public key ...
3
votes
2answers
392 views

Small, Vulnerable apps for exploit training

I'm looking for some really small apps on Ubuntu for some bufferoverflow exploitation training. I don't want to start off with some huge apps. I know some sites like http://www.oldversion.com.de/ ...
1
vote
3answers
345 views

Security risk of connecting one mobile device to another mobile device's hotspot

Is there any risk when connecting an Android Phone to a [Verizon] iPhone's Hotspot? If there are I'd like to know about solutions. The Android Phone will basically be tapping the data plan of the ...
3
votes
2answers
2k views

Are RSA 2048, ECDSA, and the SHA uncrackable in the sense that AES-256 is uncrackable?

The answer http://security.stackexchange.com/a/25392 has seemingly shown that AES-256 will not be directly cracked for at least the next 200 years (unless we manage to harvest the energy output of ...
3
votes
3answers
800 views

I want to roll my personal cloud hosted Password Manager using pass. How secure/insecure would this be?

I've come to the conclusion that I need to up my security. I currently have a dozen memorized passwords I use for every device and website. I'm against KeePass/Lastpass due to having to trust they ...
3
votes
1answer
126 views

Force user to download a file to their hard drive via hyperlink?

I want to design a scenario in which I have a web site which contains a link. If the user clicks on this link, it will save a file in a specific pat in his hard disk without his consent. Is this ...
1
vote
2answers
6k views

Unrecognized leaf certificate

Every 15 minutes or so I get this message in my system.log Apr 25 22:05:36 Ivans-MacBook-Pro.local apsd[194]: Unrecognized leaf certificate Apr 25 22:20:57 Ivans-MacBook-Pro.local apsd[194]: ...
1
vote
1answer
201 views

When does S/MIME require the other party's certificate and when is their key enough?

Trying to understand S/MIME implementation, I see that sometimes you must have the other party's certificate, and sometimes its enough to just have their public key. I'm confused as to when you need ...
0
votes
1answer
177 views

How to get rid of geolocation info on linux?

First of all: I HAVE read the "Why does Google know my location?" posts but still in my case it is a bit weird / the solutions cannot fit. The Setting: Fresh installed linux. Never ever logged in ...
0
votes
1answer
119 views

What to focus on in Cloud security? [closed]

I am writing my bachelor thesis in CS on cloud security and its weaknesses and started to do research today and got quite overwhelmed. I am mainly looking at IaaS and PaaS services and have decided ...
0
votes
1answer
197 views

What are the implications of an overly-restrictive password policy? [duplicate]

I came across an interesting password policy online recently: "Please be sure to enter a password that meets the following criteria: must be 8 characters long must not be based on dictionary words ...
2
votes
2answers
309 views

Wifi Sniffing Prevention

I share my wifi with my brother. Recently I came to know he is sniffing on my browsing. Is there a way I can prevent him from sniffing on my browsing? PS: I can't afford VPN.
1
vote
2answers
335 views

What is ISO27000 (27001) and how to achieve it? [duplicate]

I have recently came across ISO 27000. Basically what I learnt is that it is used for audit purpose in organizations. Can you tell what exactly it is, if I am wrong? What tools are available for ISO ...
1
vote
1answer
100 views

Amazon Turk - How secure is it? Strange behavior

I just had this really strange experience with Amazon Turk, where suddenly I was logged into someone else's account. I was logged into the company's Turk account, left my computer for a while, ...
1
vote
1answer
544 views

Secure connection between two clients inside a wifi without internet connection

I'm currently trying to understand secure connections inside a WiFi network without an Internet connection. I would like to use some sort of SSL tunneling inside a WiFi network between two clients. ...
1
vote
1answer
162 views

Are there vulnerabilities in display connections? [duplicate]

I have been in the market for a DisplayPort KVM. Most of these products come from small companies I have never heard of and possibly do not trust. I understand the risk of plugging in USB to any ...
1
vote
2answers
372 views

How does NASA get hacked? [closed]

I have come across several news websites which claim that NASA websites get hacked many times a year. A 15-year-old computer hacker caused a 21-day shutdown of NASA computers that support the ...
46
votes
6answers
7k views

Site is being redirected to Viagra store; all the usual suspects turn up nothing

I have a client's site (http://changewise.biz) being redirected to a Viagra store (mywifeishappy.com). We've gone through all the usual suspects but cannot find the culprit that's causing the ...
1
vote
4answers
148 views

Is it possible to block specific users that connect to the internet behind of same gateway with NAT?

Assume there are two internet users (A and B) that connect to the internet from the same gateway by using NAT. That means they use same IP address while passing through our firewall. Now assume we ...
2
votes
2answers
2k views

Avoiding SSL handshake for each call

My application interacts with many other HTTPS based services. As we use them at considerable frequency, I am worried about the performance impact of using HTTPS. Is there any mechanism ( time bound ...
0
votes
1answer
226 views

Encryption and Decryption in stateless manner

I want to store some user's security information in cookie, but I want to encrypt it so that nobody can see what is really inside it. And when client makes request, I want to decrypt it. What ...
1
vote
1answer
87 views

How to fuzz shared objects?

I know there have been similar questions about that topic, but I think mine differs from the others. I have this application which I am able to crash, but the error seems to happen inside of a shared ...
6
votes
1answer
583 views

How to detect malicious code sending information to attacker's server in linux

Suppose you have some malicious code on your linux laptop, for example a rootkit or trojan or something like that. Now restrict your attention to the case that the malicious code does transfer some ...
1
vote
0answers
336 views

Can the device seed be recovered from the iPhone/Android RSA SecurID app?

The Windows RSA SecurID app allows the device seed to be determined and cloned from one machine to another (see this blog post). Do either the iPhone or Android RSA SecurID apps suffer from the same ...
11
votes
3answers
10k views

Best method to sandbox X applications in ubuntu

What's the best way to sandbox an X application like firefox or thunderbird in ubuntu (going into the direction of what qubes os does, but only for single applications)? I know there are many ...
2
votes
1answer
820 views

JS malware detection

Is there a way to detect a malicious JavaScript code within a webpage before the script runs on my computer ? I want to develop a Python script that prevents from 8 JS malwares that I can embed on my ...
1
vote
0answers
263 views

Does Mac OS X 10.8+ support self-signed Package Installer

I'm not sure whether self-signed Package Installer are supported by Mac OS X 10.8+ Using informations in How to create an Apple Installer Package Signing Certificate I could create a Package ...
2
votes
2answers
440 views

What is the problem with multiple encryption and how do you know if you have decrypted a cipher?

I have 2 questions that are somewhat related: When you try and guess the key in a program (in a brute force way), how does the program know if it got it right and it had deciphered the message (I'm ...
10
votes
2answers
4k views

How does Android filesystem encryption work?

I'm interested in encrypting my Android devices for security in the (hopefully will-never-happen) event of the phone being recovered by an unknown/unauthorized person. How does Android filesystem ...
3
votes
4answers
955 views

Does a PGP signature provide integrity verification?

Many websites including OpenSSL's website provide downloads along with MD5/SHA1 checksums sometimes in addition to PGP signatures for the files. Simply put, do PGP signatures provide file integrity ...
2
votes
1answer
539 views

Configuration settings for sessions in php

I recently found the following configuration settings: use-strict-mode hash-bits-per-character hash-function and I have some questions about them: Use-strict-mode says the following: session....
2
votes
2answers
2k views

Load balancer and two machines - how many SSL certificates do I need?

We have a load balancer facing the Internet. It's balancing load towards two systems behind it in the back-end running apache. How many SSL certificates do I need to buy? - One for the load-balancer ...

15 30 50 per page