Ma hoa ROT la gi?
Ma hoa ROT (Xoay) la cac ma hoa thay the chu cai don gian thay the moi chu cai bang mot chu cai khac o mot so vi tri co dinh trong bang chu cai. ROT13, bien the noi tieng nhat, dich chuyen cac chu cai 13 vi tri.
Vi du, Hello tro thanh Uryyb khi duoc ma hoa bang ROT13.
ROT13 va ROT47 tu dao nguoc: ap dung cung mot thuat toan hai lan se tra ve van ban goc. Dieu nay lam cho chung huu ich de an spoiler, cau tra loi cau do hoac van ban bi lam mo nhe ma khong can mot ham giai ma rieng.