hi everyone..i need to crack a symmetric key by implementing a method called CrackSymmetricKey I must use the TEA encryption algorithm below: Code: union myMsgType{ unsigned long textConverted[2]; char text[9]; }; class TEA_Algorithm { public: void CrackSymmetricKey(union myMsgType plaintext, union myMsgType ciphertext); void Decrypt(unsigned long k[], unsigned long ciphertext[], unsigned long plaintext[]); void Encrypt(unsigned long k[], unsigned long plaintext[], unsigned long ciphertext[]); TEA_Algorithm() {}; virtual ~TEA_Algorithm() {}; }; As input, im given the following ciphertext and i need to find the secret key that has been used to obtain this ciphertext, and hence, deduce the original plaintext. // myCiphertext.textConverted[0] = 2022673309; // myCiphertext.textConverted[1] = 3810199360; Code: #include "stdafx.h" #include <iostream> #include <string.h> using namespace std; #include "TEA_Algorithm.h" void TEA_Algorithm::Encrypt(unsigned long k[], unsigned long plaintext[], unsigned long ciphertext[]) { unsigned long y = plaintext[0], z = plaintext[1]; unsigned long delta = 0x9e3779b9, sum = 0; int n; for (n= 0; n < 32; n++) { sum += delta; y += ((z << 4) + k[0]) ^ (z+sum) ^ ((z >> 5) + k[1]); z += ((y << 4) + k[2]) ^ (y+sum) ^ ((y >> 5) + k[3]); } ciphertext[0] = y; ciphertext[1] = z; } void TEA_Algorithm::Decrypt(unsigned long k[], unsigned long ciphertext[], unsigned long plaintext[]) { unsigned long y = ciphertext[0], z = ciphertext[1]; unsigned long delta = 0x9e3779b9, sum = delta << 5; int n; for (n= 0; n < 32; n++) { z -= ((y << 4) + k[2]) ^ (y + sum) ^ ((y >> 5) + k[3]); y -= ((z << 4) + k[0]) ^ (z + sum) ^ ((z >> 5) + k[1]); sum -= delta; } plaintext[0] = y; plaintext[1] = z; } void TEA_Algorithm::CrackSymmetricKey(union myMsgType plaintext, union myMsgType ciphertext) { /* what should i write here if this is what's given: plaintext:= security ciphertext: myCiphertext.textConverted[0] = 2022673309; myCiphertext.textConverted[1] = 3810199360; additional information: key[0]=key[1]=k[2]=k[3] and you're asked to determine what is the secret key that has been used to encrypt this plaintext. */ } plz help..i know i should make a loop inside but im very weak in programming