Stack Overflow
Stack Overflow

Questions tagged [cracking]

Activities to break into computer(s) or technology systems without authorized access.

Questions requesting assistance with compromised sites rarely belong on Stack Overflow and generally should go to the sister site security.stackexchange instead.

243 questions
9
votes
2 answers

How to make an 'android unlocker' app safer against crackers?

For the paid version of my app I'm opting for the unlocker app route because it's easy to implement, allows for individual stats in the Developer Console but mostly because I wouldn't need to maintain 2 code bases (one for the free version and…
rfgamaral
  • 16,546
  • 57
  • 163
  • 275
8
votes
3 answers

How to crack a dBase file password?

I've inherited a bunch of dBase (.dbf) files from a legacy application, and I need to import the data into MS SQL or MS Access. I know these programs have built in "import" functions, but the dBase files are protected with a password, which nobody…
Shaul Behr
  • 36,951
  • 69
  • 249
  • 387
8
votes
1 answer

Electron with C++ backend - secure?

I have written a UI in Electron and I would like to connect it with my C++ code. However, I will be selling this product and so I would like to know if this makes it easier for people to crack my C++ code? Obviously I know compiled C++ can be…
Jack P
  • 469
  • 1
  • 6
  • 16
8
votes
6 answers

How secure is a PostgreSQL database if my server is stolen?

If I have a server with a database of top secret data in PostgreSQL and my password is practically impossible to guess (128 character string of all sorts of weird chars, generated by hand). The server password is also practically unguessable. Aside…
orokusaki
  • 55,146
  • 59
  • 179
  • 257
8
votes
4 answers

How to prevent Android's in-app purchase items being cracked

I have a free to download Android app, which comes with in-app purchase item (Non-consumable Items) Recently, I found several black markets carry my Android app, with all the in-app purchase item can be accessible freely. I was wondering, how does…
Cheok Yan Cheng
  • 47,586
  • 132
  • 466
  • 875
8
votes
5 answers

what's the meaning of 'admin' OR 1=1 -- '

The following query return all the passwords in the table tbl_user but I can not understand why this is happening. SELECT password FROM tbl_users WHERE name = 'admin' OR 1=1 -- ' Please help me to understand this part of the query: 'admin' OR 1=1…
Daniyal Javani
  • 229
  • 1
  • 5
  • 10
7
votes
6 answers

Hacking your own application

I am a web developer that is very conscious of security and try and make my web applications as secure as possible. How ever I have started writing my own windows applications in C# and when it comes testing the security of my C# application, I am…
instigator
  • 1,587
  • 5
  • 15
  • 27
7
votes
0 answers

John the Ripper Custom Rule

I am using John the Ripper to crack a copy of the passwd file at my work. I want to alert users that have weak passwords. I happen to know that many accounts have the default password which is different for every user but matches a specific…
jamesbtate
  • 1,359
  • 3
  • 19
  • 25
7
votes
2 answers

Cracking C# application with OllyDebug

I would like to know if there is a way to crack C# Windows application with OllyDebug. I have simple my own CrackMe application written with Visual C# 2010 Express. When I open it with OllyDebug and modify ASM code as I need, there is no "Copy to…
t3rmin41
  • 668
  • 2
  • 8
  • 18
7
votes
2 answers

Unauthorised code placed on web pages

Recently a website I have been involved with was hacked with unauthorised code being placed on a number of pages. I was just wondering if anyone could shed any light onto what exactly this code does, and what benefit it would be to the user who…
Tom smith
  • 670
  • 2
  • 15
  • 31
7
votes
3 answers

howsecureismypassword.com algorithm

There is a nice site http://www.howsecureismypassword.net/ which determines how long it will take to crack a password. What I want is to implement feature like this, so I need an algorithm for that
hasrthur
  • 1,410
  • 15
  • 31
6
votes
1 answer

OTP/XOR Cracking two ciphertexts that have the same key

How can I crack two ciphertexts that have used the same key twice? For example, plaintext1 uses the key "abcdefg", and plaintext2 uses the key "abcdefg". I know that ciphertext2 ^ ciphertext1 is equal to plaintext1 ^ plaintext2. And the method to…
Mateen Ulhaq
  • 24,552
  • 19
  • 101
  • 135
6
votes
2 answers

What does this perl malware do with changing "$0"?

We had an intrusion into our server over the weekend and I'm trying to trace the tracks of the intruder. It seems they ran a perl script, causing a www-data process called init to run at 100%. Unfortunately I don't have perl expertise, so I have no…
bitmask
  • 32,434
  • 14
  • 99
  • 159
6
votes
5 answers

Decrypt MD5 hash

Is there any way to decrypt the encrypted MD5 string, given the key?
ha22109
  • 8,036
  • 13
  • 44
  • 48
5
votes
6 answers

Testing against hacking attempts

I want to make sure my site is protected against hacking attempts and I think the best way to test is to try and hack my site myself. What sort of things do hackers do to try and hack my site? E.g., Test - they might put javascript in a input field…
woot586
  • 3,906
  • 10
  • 32
  • 40
1
2
3
…
16 17