215 Topics
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| | Create a Client/Server using DatagramSocket and DatagramPacket Programming and using DiffieHellman (1024) as encryption algorithm.  |
| | Write C++ program for Elgamal Encryption. Give the results after Run the program code. |
 | Hello, have the following program code: #include <stdio.h> #include <stdlib.h> #include <ctype.h> int main (void) { char c; while( (c = getchar()) != '\n') { putchar(c); } putchar ('\n'); return EXIT_SUCCESS; } At the moment he reads in entered characters and outputs them again. I should [write](https://prowritingservice.com/write-my-essay/) it so that …  |
| | OK, I programmed a few DLLs using Linux years back. My memory (and my memory could be faulty), was that I had the program decide which dll to load based on user input. So I had two dlls, each with a `string encrypt(string, string)`function. The user was asked to specify … |
 | I am not going to lie, this is for a class project but I am lost and can't figure out where things are going wrong. We were tasked with coding an RSA algorithim based off a lab we previously did in class. The lab and project description can be found … |
| | Hello, I've been asked to create a tool using 3rd party API. The API requires to send the user details in encrypted format. The problem here, they didn't mention what kind of encryption we should do. They just provided a two C++ functions to encrypt the data. I'm a PHP … |
 | This is a program for Encryption and Decryption This program uses the Simple Data Encryption Standard (SDES) Algorithm. This Algo takes 8-bits of plaintext at a time and produces 8-bits of ciphertext. It uses 10-bits of key for Encryption and Decryption.  |
| | I'm tring to develope newcamd virtual server i have read the newcamd protocol documentation there is some missed Points the newcamd protocol uses 3des encryption 112bit CBC Mode point one : what is the padding mode?? point two : what is the vector key?? another thing for example i spyed … |
| | Problem Statement: NAtural DIAlogue team at Orange labs has an abbreviation "Nadia Team". This abbreviation causes a big problem for them in Egypt as a lot of Egyptians think this team is owned by a female called nadia and they don't know they are working on NAtural DIAlogue. To solve … |
| | I'm trying to create a very simple enigma machine cipher. But mine doesn't decrypt the data correcly. #include <iostream> #include <string> using namespace std; const char alphabet[27] = { "ABCDEFGHIJKLMNOPQRSTUVWXYZ" }; const char reflector[27] = { "WSXRFVYHNIKPQAZEDCTGBUJMOL" }; const char rotors[27] = { "QWERTYUIOPASDFGHJKLZXCVBNM" }; /* Get the position of …  |
 | File I/O With C++ Fstream **Intro** File handling is as simple as writing in a book, much easier to modify and find. It's so simple people get confused with it :-). Welcome to the world of file handling. We will use the c++ fstream classes to do our file handling. … |
| | I'm trying to understand how the function encrypt works (linux), but event with this simple example is not working. Any ideas?. Thank you. #define _XOPEN_SOURCE #include <unistd.h> #include <stdlib.h> #include <iostream> #include <string> int main() { const char key[64] = "12" ; /* bit pattern for key */ char txt[64] … |
| | I need to copy modified data that is stored in an char* to another char* but I get an access violation error. Here is the code int EncryptData(char *data_source, char *data_cipher, size_t sizeofdata) { char *tmp_data; long long int digit; tmp_data = new char[sizeofdata]; /* Do some calculations here with … |
| | I am using Qt 5.2.1 and I made a program that takes some values and saves them on a text file. What I want is that everybody can see this file and read the content but nobody can edit it. To edit it, you would have to run the program … |
| | Hello People! I am quite new to Qt (and programming in general). And I am making a program that requires me to encrypt a file and decrypt it after asking for a password through the program. But I have no Idea where to start. What I already have - A …  |
 | // A program to use a run-time loaded DLL.cpp : Defines the entry point for the console application. // #include "stdafx.h" #include <Windows.h> #include <iostream> using namespace std; //Creates a new type of variable which is a function pounter called, cryptFunPointer. typedef void (*cryptFunPointer) (int key , char inString, char …  |
| | This is the problem: Write a class EncryptableString that is derived from the STL string class. The Encryptable string class adds a member function void encrypt( ) that encrypts the string contained in the object by replacing each letter with its successor in the ASCII ordering. For example, the string … |
 | I am kind of new creating the A1Z26 cipher generator. But this has a problem. Only the program generates the last two numbers. What's wrong? #include <iostream> #include <ostream> #include <string> using namespace std; int i; // Counter char str1[101]; // A string of characters for generator. string str2, str3; … |
| | Hello! I am working on a small decryption / encryption program using Win32 Console Application c++ nothing big, here is my code: #include "stdafx.h" #include <iostream> #include <fstream> #include <conio.h> #include <stdio.h> using namespace std; int _tmain(int argc, _TCHAR* argv[]) { char name[100],target[100],ch,mod; //Declare Variables unsigned char apostrophe; int num[100],i,option; … |
| | Hello everyone, I am having trouble with an assignment. The assignment consists of a basic encryption and decryption program already written for me, I just have to write the encryption function. What we have to get the program to do is enter an integer and a text, and get the …  |
| | Hey guys, as the title says, this is my first encryption program. Being extremely simple, I was just looking for advice on ways I could improve it. I just recently got back into programming(I tried to learn before but unfortunately lost interest while I was still learning the basics) and …  |
| | So, I've been through a class in java so I know a little bit of what I'm doing... The assignment I have is to create a program that takes a string and converts the letters four away in the alphabet (ie: a becomes e and so forth). I've gotten most … |
| | Every time I want to write an encryption program, say RSA algorithm. I have to re - invent the wheel and design the key generation and all those small things my self. Now latly I heard abou AES algorithm and that it is so secure and a lot more stuff. … |
| | I wrote a very simple encryption program, well the algorithm is simple but there is one thing I am strugling with. Basicly after the user's key is generated the program will write it to a file. Then when the user want to decrypt the encrypted file, the file with the … |
| | Can someone help me with this? This is part of my first assignment. I am quite new to programming. > A company wants to transmit data over the telephone, but they are concerned that their phones are tapped. All of their data are transmitted as four-digit integers. They wanted you …  |
| | I have an XML file that is in this format: <root> Test string <Signature> WvZUJAJ/3QNqzQvwne2vvy7U5Pck8ZZ5UTa6pIwR7GE+PoGi6A1kyw==</Signature> </root> I was able to produce the SHA256 and produced a string by using the following: string CalculateSHA256(const string& input) { SHA256 hash; string digest; StringSource _(input, true, new HashFilter(hash, new HexEncoder (new StringSink(digest)))); return …  |
 | I just have a program to implement RSA encryption, and it runs but when I try to encrypt a message it crashes. When I bebug it won't show any error, What is the issue,How Can I fix the program? #include<iostream> #include<cmath> using namespace std; #define MAXLENGTH 500 int size = … |
 | Hello, I need to encrypt an image but my program is accepting 16 bytes of data for encryption from a file named plaintext.txt.. The program is encrypting data in blocks of 16 bytes that is the 1st 16 bytes are read then it is encrypted and saved in the ciphertext.txt …  |
| | I have a project and a part of it is related to sha 1 encryption using openMP. Any help would be highly appreciated. |
| | I have made this RSA encryption program but it crashes when it is finished decrypting the line. What is wrong and how can I fix it? #include <iostream> #include <string> #include <cmath> using namespace std; bool IsPrime(int p); int main() { int p, q; int n, phi; int e, d; … |
| | I have this RSA encryption code but it doesnt encrypt the whole message its suppose to encrypt. It only encrypts #include <iostream> #include <string> #include <string.h> using namespace std; // prime numbers int p, q; //compute int n ;//= p * q; //totient int phi;// = (p - 1) * … |
| | http://en.wikipedia.org/wiki/Transposition_cipher#Columnar_transposition This is wiki site of what am trying to do #include <iostream> #include <cstring> #include <cmath> using namespace std; char GRID[3][80]; int MENU(int menu_choice); int REVIEW_OF_GRIDS_FIRST_79_CHARACTERS(int four); int main() { cout << " This is RAIL FENCE CIPHER\n" << endl; //----------------------------------------------------------------------------------------------------- //filing GRID with asterisks(*) char asterisk='*'; int k=-1; …  |
| | I've tried cin >> userInput; and it stops reading the word after it hits a space. but then I tried cin.get and it just skips all the other cins. Then I tried cin.getline and it skips over the userInput cin and goes right to the next cin (cin >> direction). … |
| | Hello, I'm now year 12 in a programming oriented high school and I have some 3-4 months to complete a programming based project. I know SQL (completed "Introduction to Computer Science" course), PL/SQL (New to PL/SQL but I'm learning fast), C# (learned it 3 years and had good grades) and …  |
| | Hi, I am using RC4 to encrypt the data. It works fine. But I found that some encrypted values contains NULL character or other escape characters in result. Due to which when I read the string back to decrypt, does not give the whole string back but truncate the string. … |
| | I need some project ideas on cryptography/information system securoty for a simple and small project.......  |
| | I'm coding a encryption program where I need to generate random prime. I wrote this code for(i=3; i<10000000; i=i+2 ) { for(j=2; j <= sqrt(i); j++ ) { if(!(i%j)) break; } if (j>sqrt(i)) { cout<<i << " "; } } This tests a number till is square root. Its good …  |
| | I am new to this forum but need help with some code. This is not for school, so help would be appreciated. I have an E Book Reader (Chinese Hanlin w/ Android OS). I need to be able to password protect the USB port, so nothing can be downloaded onto … |
| | #include <iostream> #include <cmath> #include <string> #include <cstdlib> #include <cstring> using namespace std; char Outputing(char shifted_letter); int found_match; int searching_alphabet; int main() { const char ORIGINAL_alphabet[26]={'a','b','c','d','e','f','g','h','i','j','k','l','m','n','o','p','q','r','s','t','u','v','w','x','y','z'}; //maybe const isn't necesery char alphabet[26]={'a','b','c','d','e','f','g','h','i','j','k','l','m','n','o','p','q','r','s','t','u','v','w','x','y','z'}; cout << "This program encrypts messages using Ceaser Cipher\n"; cout << "\n---------------------------------------------------------"; cout << "\n---------------------------------------------------------"; cout << "\nEnter …  |
 | #include <iostream> #include<string> using namespace std; int main() { string admin_pwd="testing"; string encrypted ; string unencrypted; char key[5] = "abcd"; for (int x=0; x < admin_pwd.size(); x++){ encrypted += admin_pwd[x] ^ key[x/100%30]; } cout << "Encrypted = " << encrypted<<endl; for (int x = 0; x < admin_pwd.size(); x++){ unencrypted …  |
| | hi i am getting a floating point error while im trying to complile the rc4 encryption in c++...i was wondering if anyone could help me out...i have the code pasted as below #include <stdio.h> #include <iostream.h> #include <ctype.h> #include <string.h> unsigned char s[256]; unsigned int i, j; void swap(unsigned char …  |
| | I know that it generates a public key and then a private key. You encrypt with public and can only decrypt with private key. How is this algoritm going to work in a C++ program, how am i going to compute the public key and then the private key? Also, … |
| | I have this code and when ever i try to put in the value 'e' it doesnt want to take it, the program freses. #include <iostream> #include <string> #include <fstream> using namespace std; int encrypt(); int decrypt(); int phi, M, n, e, d, C, N, D, answer, p, q, s; … |
| | Is that possible to decompile a C++(or Java) "exe" file enough to read a TEXT password,stored in the source? .......just a regular string or char. no encryption or stuff  |
| | Hello, I have just recently begun the move from Java (beginner) to C++ and have found an interestng project I would like to develop which should teach me some great c++ code. **Encrypted Console Journal** * Text File Encryption * File IO * Date && Time System Retrieval * Text …  |
| | I have this encryption code, it encrypt the file but doesnt want to decrypt it: it gives a segmentation fault error. By the way i am using linux... #include <iostream> #include <string> #include <fstream> #include <cstdlib> #include <sstream> #include <vector> using namespace std; int n, c, l; void gen_code(string word1, … |
| | I am implementing RSA in C++ and here's my design(code structure). *keygen.h* namespace rsa{ class keygen{ public: //Constructor keygen(size); //Generate keys void generate(); //Getters string gete(){ return xyz; } .. .. .. private: //initializes bignums void initall(); keygen(){} //Private Member variables goes here } } *prime.h* namespace rsa{ //First 100 … |
| | Hey guys! I have an encryption project for school and i have to randomly generate a 3x3 matrix. I know how to assign the values to the 2d array but i am unsure how to return the array. I know it is possible to return a vector of a vector …  |
| | Hello everyone, I wanted to implement AES encryption technique to encrypt text file of any size. but for large size my compiler crashes.could anyone solve my problem problem is in line 304 according to me I attached my code with this thread plz help me asap. |
| | It doesn't run! Can you help me please? Devc++ compiles it, and also launch the exe file, but it stops after the second for cycle! Why? :D [CODE]#include <iostream> #include <string> using namespace std; int main() { int N,i,z; cout<<"Digitare il umero di caratteri che contengono il nome "; cin>>N; … |
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