Abstract: The age of big data provides new opportunities and challenges to the memory/storage system.Traditional main memory architecture based on DRAM faces the problems of capacity,energy consumption and reliability.The new non-volatile memory (NVM) devices are non-volatile and byte-addressable,and possess the feature of low idle consumption,so they can replace persistent storage,main memory or storage class memory (SCM).Though NVM devices provide new choices to the revolution of traditional memory/storage system,there are some security concerns as well.For NVM device itself,the endurance is limited.So writing frequently at one place can wear it out.The lifetime of the NVM devices can be seriously affected by that.When NVM devices work as memory,the non-volatile feature makes the data persistent in the NVM devices.The attackers can steal it and extract sensitive information or tamper the data.When NVM devices work with DRAM as heterogeneous memory,hard-to-find pointers may occur because of non-volatile feature of NVM.In addition,NVM device can work as SCM,because it’s byte-addressable like DRAM.Applications can directly operate the NVM devices through load/store interface bypassing the file system.This paper surveyed some solutions about wear-leveling,reducing write operation,reducing write amount,encrypting main memory,designing consistent and right management mechanism.Finally,it explored some issues that need to be concerned from the aspects of hardware,OS and programming model.

Key words: Consistency, Encryption, Non-volatile memory, Safety, Wear-leveling