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Encryption key management

A technology for encrypting keys and keys, which is applied in the field of memory and can solve problems such as loss of content in volatile memory

Pending Publication Date: 2022-07-19
MICRON TECH INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Volatile memory will generally lose its contents when power is removed from the device permanently or in some cases temporarily

Method used

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Examples

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Embodiment Construction

[0010] Encryption methods may use block ciphers to provide data security, for example, using keys to authenticate data. For example, a key can convert data from plaintext to ciphertext when encrypting; and convert data from ciphertext to plaintext when decrypting. Block ciphers provide block transformation of information bits to encrypt (or conversely, decrypt) data. For example, Advanced Encryption Standard (AES) is a type of block cipher. Additionally, block ciphers may operate in different modes within the encryption device / method, eg, as a "stream cipher" using a counter. For example, a counter can be used as a basis for changing the underlying key used by the block cipher so that the key changes over time; in turn, changing the data in the encrypted data stream. For example, Galois / Counter Mode (GCM) is a type of stream cipher.

[0011] It can be complex and cumbersome to secure NVDIMM devices.

[0012] Examples of systems and methods described herein provide for eras...

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PUM

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Abstract

The invention relates to encryption key management. Examples of systems and methods described herein provide for erasing an encryption key for data access to a non-volatile memory device. The memory controller may generate an encryption key for data access to the non-volatile memory device; and, to provide security for data stored on the non-volatile memory device, the memory controller may store the encryption key in a local cache of the memory controller. The encryption key may be erased in response to losing power or powering down the memory controller. Advantageously, when the memory controller (or a computing device implementing the memory controller) loses power, the data stored at the non-volatile memory device may not be accessed. Thus, if a malicious actor physically removes (or steals) a computing device implementing the memory controller (e.g., a laptop) to retrieve the data, the data stored on the non-volatile memory device may not be accessed.

Description

technical field [0001] Embodiments of the present disclosure relate generally to a memory, and more particularly, in one or more of the illustrated embodiments, to erasing an encryption key used for data access to a non-volatile memory device key. Background technique [0002] Emerging memory architectures are designed to handle a range of memory access requests and may include memories with different characteristics. For example, memory may include dynamic random access memory (DRAM) and phase change memory (PCM). Non-volatile memory can be extremely non-uniform. For example, some NAND flash memories (eg, based on page type) can be read or written faster than others, the latency varies as they wear out, or different NAND flash memories have different levels of cells (eg Multi-Level Cell (MLC)). Emerging memory architectures can also utilize non-volatile dual in-line memory modules (NVDIMMs) such as NVDIMM-P or NVDIMM-F. NVDIMMs typically include both non-volatile and v...

Claims

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Application Information

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IPC IPC(8): G06F21/79G06F21/62G06F21/60G11C14/00G11C7/20
CPCG06F21/79G06F21/6218G06F21/602G11C14/0018G11C14/0063G11C7/20G06F13/1668G06F13/4068G06F13/4221G06F2212/1052G06F2212/7203G06F2212/214G06F2212/466G06F12/1408G06F2212/402G06F2212/312G06F12/0238G06F12/0246G06F21/107
Inventor D·赫尔顿J·赫里茨
Owner MICRON TECH INC
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