Payman Kalani torbaghan - Department of Computer Engineering, Neyshabour Branch, Islamic Azad University, Neyshabour, Iran
Reza Ghaemi - Department of Computer Engineering, Quchan Branch, Islamic Azad University, Quchan,iran
Maryam Kheirabadi - Department of Computer Engineering ,Neyshabour Branch, Islamic Azad University, Neyshabour , Iran

In recent years, the rapid growth of the Internet, IoT and cloud computing has driven the growth of data across all areas of industry and commerce. "Big Data" is a word for large data sets, large, diverse, and complex, with difficulties in storing, analyzing and visualizing. Ineffective macro data should not just focus on the volume, speed or variety of data, but should focus on the best way to protect data. However, there is an obvious contradiction between security and privacy of the big data and its widespread use. Many techniques have been proposed and implemented such as encryption and anonymity based techniques and other techniques for the protection of data privacy and macro security. But unfortunately, not all of these techniques are fully suitable due to the basic features of large data, such as volume, variety and speed. This article discusses the challenges and challenges facing privacy and security. Then a number of possible techniques to ensure the security and privacy of the big data are discussed and their advantages and disadvantages are discussed.

Big Data, Security, Privacy, Big Data Value