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Non-volatile memory data secure erasing method based on random time

A non-volatile, data security technology, applied in the field of data security, can solve the problems of different erasing time and failure to restore valid data, etc., to increase the difficulty and ensure the effect of data security

Active Publication Date: 2019-10-11
TIANJIN UNIV
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  • Claims
  • Application Information

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Problems solved by technology

For this reason, this patent proposes a data security erasing method suitable for non-volatile memory. This method uses a random number generator and a counter to control the erasing time, so that the erasing time of each block of the memory is different, so that the attacker cannot recover valid data

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  • Non-volatile memory data secure erasing method based on random time
  • Non-volatile memory data secure erasing method based on random time

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Embodiment Construction

[0025] The present invention aims to propose a method for securely erasing non-volatile memory data based on random time. The method uses a random number generator, a counter and a high-frequency clock structure to regulate the data erasing time so that the erasing time is random, and then The number of residual electrons in the floating gate unit is made random, which greatly increases the difficulty of data recovery and ensures the data security of the memory chip.

[0026] Aiming at the problem of data residue in the general erasing method of non-volatile memory, the present invention proposes a data erasing method based on random time, which first performs a general erasing, and then performs a special random time erasing, thereby The overall erasing time is made random, which ensures that the data in the non-volatile memory cannot be recovered.

[0027] In order to make the purpose of the present invention, technical scheme clearer, below will combine figure 1 The flow c...

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Abstract

The present invention relates to the field of data security, and aims to provide a random time based nonvolatile memory data secure erasure method. The method comprises: by using a random number generator, a counter and a high frequency clock structure, regulating and controlling the data erasure time, so that the erasure time is random, the number of residual electrons in the floating gate unit is random, difficulty of data recovery is greatly increased, and data security of the memory chip is guaranteed. Thus, the technical scheme adopted in the present invention is the random time based nonvolatile memory data secure erasure method, and the method specifically comprises the following steps: by using a random number generator, a counter and a high frequency clock structure, controlling the data erasure time, so that the erasure time is random, and the number of residual electrons in the floating gate unit is random. The method disclosed by the present invention is mainly applied to data security.

Description

technical field [0001] The invention relates to the field of data security, in particular to a method for safely erasing nonvolatile memory data based on random changes in erasing time. Background technique [0002] With the rapid development of microelectronics technology, memory chips, as the only carrier of various data and programs, are increasingly subject to external attacks, posing a huge threat to users' independent intellectual property rights and sensitive information. Among them, the non-volatile memory represented by FLASH memory has been widely used in various fields of society due to its advantages of large capacity, small size, and fast transmission rate. [0003] However, the existing non-volatile memory has data residual phenomenon, and it will be a huge challenge to completely remove the key data remaining in it. Even after physical erasing or overwriting, the non-volatile memory unit (floating gate unit) still remains The presence of residual electrons al...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G11C16/04G11C16/14G11C16/34
Inventor 赵毅强辛睿山赵公元王佳李跃辉
Owner TIANJIN UNIV