Samsung Electronics Co., Ltd.

Seongjun Ahn

Heewon Lee

Sangkwon Moon

Jun-Ho Jang

Seokhwan Kim

A storage system includes a host device and a storage device. The host device generates a file, and generates a unique file identifier (UFID) for each file, wherein the UFID is based on an identifier of the generated file and at least one logical address corresponding to the generated file. The storage device generates a key for encrypting or decrypting write data corresponding to the generated file based on the UFID and a random number, and encrypts the write data by using the key.

Storage device and storage system configured to perform encryption based on encryption key in file unit and method of operating using the same

Embodiments include a method of operating a storage device including a flash memory, comprising: calculating a reuse period of a selected memory block in the flash memory; determining a set of wordlines of the selected memory block for writing data based on the reuse period of the selected memory block; and writing the data into the set of wordlines.

Method for operating storage device determining wordlines for writing user data depending on reuse period

A storage device includes a nonvolatile memory having a plurality of memory cells and a memory controller to control the nonvolatile memory. The operating method of the storage device includes reading previously programmed memory cells among the memory cells of the nonvolatile memory and determining a time after erase of the previously programmed memory cells, programming selected memory cells of the nonvolatile memory, and programming meta data including a time after erase of the selected memory cells, based on the determined time after erase of the previously programmed memory cells.

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Seoul, South Korea

Seongjun Ahn