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  1. #include <iostream>
  2. #include <string>
  3. #include <cmath>
  4. using namespace std;
  5.  
  6. string RSA(string buf, string alf, int ed, int n)
  7. {
  8. 	string TC;
  9. 	for (int j = 0; j < buf.length(); j++)
  10. 	{
  11. 		for (int i = 0; i < alf.length(); i++)
  12. 		{	
  13. 			if(buf[j] == alf[i])
  14. 			{
  15. 				cout << i <<" ";
  16. 				int En = i;
  17. 				int step = En;
  18. 				for (int x=2; x<= ed; x++)
  19. 					step = (step*En)%n;
  20. 				En = step;
  21. 				cout << En << endl;
  22. 				TC += alf[En];
  23. 			}
  24. 		}
  25. 	}
  26. 	return TC;
  27. }
  28.  
  29.  
  30.  
  31. int main()
  32. {
  33. 	int p = 3;
  34. 	int q = 7, e = 5, d  = 17;
  35. 	int n= p*q;
  36. 	int fi = (p-1)*(q-1);
  37. 	string alf = "abcdefghijklmnopqrstuvwxyz "; 
  38. 	string buf;
  39. 	cout << "Vvodi stroku: ";
  40. 		getline (cin, buf);
  41. 		cout << buf << endl;
  42. 		string TC = RSA (buf, alf, e, n);
  43. 		cout <<"Encrypt -> "<< TC << endl;
  44. 		string UnTC = RSA (TC, alf, d, n);
  45. 		cout <<"Decrypt -> "<< UnTC << endl;
  46.  
  47.  
  48. 	return 0;
  49. }
  50.  
Success #stdin #stdout 0s 4524KB
comments (?)
stdin
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abc
stdout
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Vvodi stroku: abc
0 0
1 1
2 11
Encrypt -> abl
0 0
1 1
11 2
Decrypt -> abc
https://ideone.com/L7eI4P
language:
C++ (gcc 8.3)
created:
4 years ago
visibility:
public

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