Encryption at runtime

#include <iostream>
#include <Windows.h>

using namespace std;

void XorEncrypt(DWORD orig, DWORD size)
{
	__asm
	{
		push eax
		push ecx

		mov eax, orig
		mov ecx, orig
		add ecx, size
		enryption_loop:
		xor byte ptr [eax], 0x9A
		inc eax
		cmp eax, ecx
		jl enryption_loop

		pop eax
		pop ecx
	}
}

int main()
{
	string orig = "Hello World";
	DWORD size = orig.size();
	
	XorEncrypt((DWORD)&orig, size);

	system("pause");
	return 0;
}