Abstract
Transmission of digital contents over public channel with access restricted to intended beneficiary even the contents are intercepted by others. In technological ages, cryptography plays a vital role in broadcasting, network communication, cell phones, etc. for transmitting sensitive information. The era of quantum information processing has many applications in daily life and one of its implications in data security. The data security and quantum information are two different modules of information processing that uses the notion of qubit model instead of classical information theory. It uses quantum mechanics instead of classical mechanics for information processing (covert communication). Elements of quantum theory have energy and angular momentum called spin, which carries the polarization. The purpose of writing this article is to introduce the concept spinning from quantum dynamics in data security, which leads to the development of quantum cryptography. The scope of this article is to protect contents' privacy by polarized spin matrices passed by finite-state machine at secret phase information.