I need a small program that can calculate the checksum from a user input. Unfortunately, all I know about the checksum is that it's xor all data in packet. I have tried to search the net for an example without any luck. I know if I have a string: 41,4D,02,41,21,04,02,02,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00...
Ever since reading Clean Code I have been trying to keep my code descriptive and easy to understand. I have a condition where either A or B must be filled in. But not both. And not neither. Currently the if statement to check for this condition is hard to follow at a glance. How would you write the following to make it clear at a gl...
Possible Duplicate: What does ^ do in c# (Enums)? This may be a noobish question but...nowhere have I seen what Xor means in c++ or c#. I think it might mean and/or and if it does, im smart cause that's a blind guess =D. I use c# now but im pretty sure xor means the same thing. The problem is - I don't know what xor means. ...
I know J has a primitive that works like xor ~:, but this is really a not equal to (!=) I can make it function like a bitwise xor by saying:xor =: 4 : '#.((#:x)~:(#:y))' within a verb definition, but this only works when the binary representations of the numbers are the same length. Is there anything I can do short of making a full-out ...
hey all, im getting this error, and i don't know why. Fatal error: Maximum execution time of 30 seconds exceeded in E:\web\autoopti\thanks.php on line 65 The code I have for the PHP script is: <?php $key = 129; $email = $_REQUEST["payer_email"]; $first = $_REQUEST["first_name"]; $last = $_REQUEST["last_name"]; $...
hey all, is it possible to have some sort of very simple reversible encryption in php that can be reversed using C# Winforms? thank you ...
hello all. i'm having a problem while encrypting some data in the file. i'm using simple xor for that. lets say i have this struct: struct MyFile{ char fileName[128]; int account; float balance;}; saving this as a binary file is working properly but when i use xor to encrypt the filename in the struct and save the struct to hd then re...
What is the simplest way to do a three-way exclusive OR? In other words, I have three values, and I want a statement that evaluates to true IFF only one of the three values is true. So far, this is what I've come up with: ((a ^ b) && (a ^ c) && !(b && c)) || ((b ^ a) && (b ^ c) && !(a && c)) || ((c ^ a) && (c ^ b) && !(a && b)) Is th...
From: Encryption Co. To: x$*sj4 (that's you) Your mission, should you choose to accept it, is to create a program in the shortest number of keystrokes that Takes two filenames parameters (either command line or stdin), the first is a file containing the key and the second some message. Both files will be plain text. Applies the key t...
I have been trying to Implement XOR linked list and its operations but I have not been able to do it properly. Is it possible to implement it in C since XOR link list involves operations on addresses?? I would be very thankful if some actual working code is given. ...
I have a simple function, that checks if the strings given match a certain condition, then generate a 3rd string based on the 2 ones received as arguments. The 3rd string is fine but when I return it it suddenly turn into "\n". string sReturn = ""; if (sText.size() != sPassword.size()) { //Checks to see if the texts match a conditi...
The problem is that I want to get the original values of B, or the original value of C or A. Here is the code: Dim strA As String = "A" Dim strB As String = "B" Dim strC As String = "C" Dim result As Byte = 0 ' Fetch the byte character code of strings and Xor them all into the result in a sequence. result = resu...
i am making a program to implement xor encryption,while playing around with my program i entered various key combinations the program was working perfectly until i entered value of key : 904932 which caused ommition of 'd' character e.g if i enter 'hi my name is dexter and i hate my stupid sister dede' in edit1,encrypting and decrypting...
How to make an Encode function based on this Decode function? I got the source code for the Decode function on the internet but I need the Encode function. All my attempts to make it failed and the original coder isn't available at the moment. The (original) code: byte Decode(byte EncodedByte) { EncodedByte ^= (byte)194; Encod...
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 crack plaintext1 ^ plaintext2 is the same method to crack a "book cipher" (also sometimes c...
Looking forward to see some cool XOR tricks. May be using other bit-wise operators also. ...
Hi, I'm currently writing a very small Java program to implement a one-time-pad, where the pad (or key) itself is generated as a series of bytes using a SecureRandom object, which is seeded using a simple string with the SHA-512 algorithm. Generating the one-time-pad hasn't caused any problems, and if I supply the same seed string each...
Possible Duplicate: Why is this statement not working in java x ^= y ^= x ^= y; Sample code int a=3; int b=4; a^=(b^=(a^=b)); In c++ it swaps variables, but in java we get a=0, b=4 why? ...