- Paul大先生Lv 51 decade agoFavorite Answer
Don't know what you ask exactly! But I'll try to answer it
1) from English point of view, there are many words you can use, such as:
protection, security, safeguard, defense, shield...
2) if you are talking about protect the source code file, you can use
password protection, scramble code, firewall...
3) if you are talking about inside the program (i.e., programming), you can use
private/local variables (instead of global variables)